Zealand Cohort Research Articles

The prevalence and clinical features of leflunomide-associated peripheral neuropathy in patients with rheumatic disease in a New Zealand cohort.

To identify the prevalence and clinical features of leflunomide-associated peripheral neuropathy in patients with rheumatic disease over a 42-month observational period between January 1, 2016 and June 30, 2019. A retrospective observational study was conducted using regional prescription data identifying all patients treated with leflunomide for rheumatic diseases in the Southern District Health Board of New Zealand. Medical records were used to identify patients who developed peripheral neuropathy while receiving treatment with leflunomide. Demographic characteristics, co-therapies, and additional risk factors for peripheral neuropathy were also recorded. A total of 482 patients were identified as receiving leflunomide for the treatment of rheumatic during the study period. In total, 23 patients developed leflunomide-induced peripheral neuropathy within the cohort giving a prevalence of 4.7%. Nerve conduction studies (NCS) performed in 18 (78.2%) of these patients confirmed a distal axonal, sensory, or sensorimotor peripheral neuropathy. The majority of patients (n = 22; 95.6%) either improved, stabilized, or resolved on cessation of the drug, with or without medication washout. Adverse symptoms were reported in association with peripheral neuropathy in 15 of the 23 patients (65.2%): these included pain, poor sleep, compromised skin integrity, poor balance, and a Charcot-like arthropathy. Additional treatment was required to manage symptoms of peripheral neuropathy including nine patients (39%) who received pain relief. This study supports the previously reported association between leflunomide treatment and the development of a peripheral neuropathy. However, our findings suggest that this is more common than the previous estimates. In patients with psoriatic arthritis and previous tarsitis, there appeared to be an association with a Charcot's-like arthropathy, a complication not previously noted in the literature.

Food neophobia scores at 8 Years and associations with nutrition-related behaviors at home in early life: Findings from a New Zealand contemporary birth cohort

Food neophobia (FN) reduces nutritional adequacy and variety which poses a significant concern for children's health and well-being We described the FN scores among 8-year-olds and examined its associations with nutrition-related behaviors at 45 months within the Growing Up in New Zealand cohort (n = 4621). FN was estimated using the Food Neophobia Scale (FNS). Mean FNS scores between variable categories were compared using t-tests for independent samples and ANOVA. Associations between FNS scores at 8 years and nutrition-related behaviors at 45-months were examined using multivariate linear regression. The mean (standard deviation) FN score was 46.2 (15.2) with statistically significant differences by sex (boys = 47.6 (15.7), girls = 43.8 (14.2), p=<0.001). For all children, in models adjusted by breastfeeding duration and sociodemographic characteristics: children who sometimes and never/almost never ate the same foods as their parents, scored, on average, 5.8 and 11 points higher in the FNS (versus those who did always/almost always); children who occasionally/never found mealtimes enjoyable scored on average 3.6 points lower in the FNS (versus mostly/quite often); children who always/almost always had the television on during mealtimes scored on average 2.7 higher in the FNS (versus never/almost never). In comparison to children who mostly/quite often had time to talk to others during mealtimes, those who never/occasionally did it scored on average higher points in the FNS overall (1.46 points higher) and within girls (1.73 points higher). These findings support the eating behavior statements in the National Children's Food and Nutrition Guidelines, which emphasize early exposure to food variety, limiting mealtime distractions, and acknowledge that parental role modeling shapes children's nutrition-related behaviors. Early adoption of preventative interventions for reducing FN in early and middle childhood are needed.

Eye care following pre-school vision screening: Data from the Growing Up in New Zealand study.

This study aimed to determine adherence with follow-up from the New Zealand pre-school vision screening programme. The study also examined associations between pre-school vision screening outcomes and cognitive measures assessed at the 54-month follow-up in the Growing Up in New Zealand study cohort. A cross-sectional retrospective record review of pre-school vision screening outcomes and hospital ophthalmology records with linkage to Growing Up in New Zealand cohort study data. Of 176 children referred from vision screening, 21.6% did not attend a referral appointment. Of 138 children who attended a referral appointment, 21.0% did not attend one or more follow-up appointments. Ethnic differences were observed in attendance at referral appointments (attended Māori 13%, Pacific 22.5%, European/Other 64.5%; not attended Māori 26.3%, Pacific 28.9%, European/Other 44.7%; P = 0.04) and follow-up appointments (attended Māori 11.9%, Pacific 15.6%, European/Other 72.5%; not attended Māori 17.2%, Pacific 48.3%, European/Other 34.5%; P = 0.001). Vision screening outcome was significantly associated with letter naming fluency scores (P = 0.01) but not name and numbers scores (P = 0.05). Non-attendance at referral and follow-up appointments limits the efficacy of vision screening, particularly for children of Māori and Pacific ethnicity. Children referred from vision screening achieve lower scores on letter naming fluency, a key predictor of reading ability in later childhood. Equity-based improvements are required to ensure that all children referred from vision screening receive appropriate follow-up eye care.

Comparison of outcomes of the 50-year follow-up of a randomized trial assessed by study questionnaire and by data linkage: The CONCUR study.

Self-reported questionnaires on health status after randomized trials can be time-consuming, costly, and potentially unreliable. Administrative data sets may provide cost-effective, less biased information, but it is uncertain how administrative and self-reported data compare to identify chronic conditions in a New Zealand cohort. This study aimed to determine whether record linkage could replace self-reported questionnaires to identify chronic conditions that were the outcomes of interest for trial follow-up. Participants in 50-year follow-up of a randomized trial were asked to complete a questionnaire and to consent to accessing administrative data. The proportion of participants with diabetes, pre-diabetes, hyperlipidaemia, hypertension, mental health disorders, and asthma was calculated using each data source and agreement between data sources assessed. Participants were aged 49 years (SD = 1, n = 424, 50% male). Agreement between questionnaire and administrative data was slight for pre-diabetes (kappa = 0.10), fair for hyperlipidaemia (kappa = 0.27), substantial for diabetes (kappa = 0.65), and moderate for other conditions (all kappa >0.42). Administrative data alone identified two to three times more cases than the questionnaire for all outcomes except hypertension and mental health disorders, where the questionnaire alone identified one to two times more cases than administrative data. Combining all sources increased case detection for all outcomes. A combination of questionnaire, pharmaceutical, and laboratory data with expert panel review were required to identify participants with chronic conditions of interest in this follow-up of a clinical trial.

How mothers talk to their children about failure, mistakes and setbacks is related to their children's fear of failure.

Many people fear failure and making mistakes. This fear can be transmitted from parents to children, suggesting that parental communication regarding failures and setbacks may play a critical role in shaping a child's perception of mistakes. In this study, we investigated how everyday parent-child conversations about setbacks influence children's fear of making mistakes. Drawing on the large pre-birth Growing Up in New Zealand cohort, we focused on a sub-sample of 231 mother-child dyads who engaged in a recorded conversations about a "recent disappointment or setback" when the children were 8 years old. Conversations between mothers and children about the recent disappointments were coded to identify whether parents recognised or acknowledge their child's emotional response, if action plans were discussed, and the types of resources that the child could draw on. The children also completed a questionnaire about their global self-worth and their fear of making mistakes. The discussion of clear action plans, in the absence of a discussion about collaborative resources, was found to be associated with an increased fear of making mistakes among children. Conversely, when mothers clearly acknowledged their child's emotions and discussed ways to work collaboratively with their child on future problems, there was a notable decrease in the child's fear of mistakes. However, it is noteworthy that many mothers in our study either minimally acknowledged or dismissed their child's emotions(40%), rarely discussed action plans (55%), or collaborative resources (79%)when discussing the recent setback.

Feasibility of C2 Lamina Screw Placement in a New Zealand Cohort: Computed Tomography Analysis According to Ethnicity and Gender.

Previous analyses have suggested variations in cervical spine canal morphology according to ethnicity, possibly in part due to variations in the posterior elements. The potential for these variations to affect the placement of instrumentation is uncertain. The aim of this study was to report on the feasibility of C2 lamina screw insertion in a New Zealand cohort including analysis of Māori, the indigenous people of New Zealand. A trauma computed tomography database was accessed to identify suitable images. On axial images, where the isthmus was at its widest, the outer diameter (OD) and inner diameter (ID) of the lamina were measured. Screw length was measured from a proposed entry point to the contralateral junction of the lamina and lateral mass. The spinolaminar angle was measured as the angle subtended by the screw trajectory and midsagittal plane. A 5.5-mm OD was accepted as a threshold for the feasibility of lamina screw placement. One hundred eighty-seven images were assessed: 115 New Zealand European and 72 Māori. The mean age of the cohort was 41.9 years (SD 19.6), and most patients (64%) were men. For the entire cohort, mean OD was 6.6 and 6.8 mm on the right and left, respectively; the mean inner diameter was 3.5 and 3.8 mm; mean screw length was 31.5 and 31.5 mm; and mean spinolaminar angle was 46.0° and 46.1°. C2 lamina screw placement was feasible in a majority of patients. Considering only Māori patients, placement was feasible in 96% of right and 94% of left laminae in men but 72% of right and 72% of left laminae in women. In a majority of patients, C2 lamina screw placement is feasible. However, advanced imaging must be carefully assessed preoperatively because data suggest that Māori women may not necessarily have optimal anatomy.Clinical RelevanceCare needs to be taken when assessing and planning surgery inpatients of different ethnicities because variations may exist in the morphology of the posterior elements of C2, leading to variation in optimal fixation strategy.Level of Evidence3.

2023 Australian guideline for assessing and managing cardiovascular disease risk.

The 2023 Australian guideline for assessing and managing cardiovascular disease risk provides updated evidence-based recommendations for the clinical assessment and management of cardiovascular disease (CVD) risk for primary prevention. It includes the new Australian CVD risk calculator (Aus CVD Risk Calculator), based on an equation developed from a large New Zealand cohort study, customised and recalibrated for the Australian population. The new guideline replaces the 2012 guideline that recommended CVD risk assessment using the Framingham risk equation. The new guideline recommends CVD risk assessment in people without known CVD: all people aged 45-79 years, people with diabetes from 35 years, and First Nations people from 30 years. The new Aus CVD Risk Calculator should be used to estimate and categorise CVD risk into low (< 5% risk over five years), intermediate (5% to < 10% risk over five years) or high risk (≥ 10% over five years). The following reclassification factors may be applied to recategorise calculated risk to improve accuracy of risk prediction, particularly in individuals close to a risk threshold: Indigenous status/ethnicity, estimated glomerular filtration rate, urine albumin to creatinine ratio measurements, severe mental illness, coronary artery calcium score and family history of premature CVD. A variety of communication formats is available to communicateCVD risk to help enable shared decision making. Healthy lifestylemodification, including smoking cessation, nutrition, physical activity and limiting alcohol, is encouraged for all individuals. Blood pressure-lowering and lipid-modifying pharmacotherapies should be prescribed for high risk and considered for intermediate risk individuals, unless contraindicated or clinically inappropriate. Reassessment of CVD risk should be considered within five years for individuals at low risk and within two years for those with intermediate risk. Reassessment of CVD risk is not recommended for individuals at high risk. CHANGES IN ASSESSMENT AND MANAGEMENT AS A RESULT OF THE GUIDELINE: The updated guideline recommends assessment over a broader age range and uses the Aus CVD Risk Calculator, which replaces the previous Framingham-based equation. It incorporates new variables: social disadvantage, diabetes-specific risk markers, diagnosis of atrial fibrillation and use of blood pressure-lowering and lipid-modifying therapies. Reclassification factors are also a new addition. Updated risk categories and thresholds are based on the new AusCVD Risk Calculator. The proportion of the population in the high risk category (≥ 10% over five years) is likely to be broadly comparable to more than 15% risk from the Framingham-based equation. The full guideline and Aus CVD Risk Calculator can be accessed at www.cvdcheck.org.au.

Children's speech, language and communication skills and parental knowledge in the growing up in New Zealand cohort.

There is a substantial discrepancy between international and local prevalence rates for speech, language and communication needs (SLCN) amongst children in New Zealand. Reports of communication impairment are likely to be underestimates. Prevalence data can describe population characteristics and inform the scope and nature of services to adequately meet demand. Parents and other caregivers are central to the early identification of children with communication needs but they may not recognise their child's needs or act on their concerns. Cross-sectional data were available for the Growing Up in New Zealand (GUiNZ) longitudinal study cohort at 24, 54 and 72 months of age, with 76% of whānau (families; n = 5241) completing three data waves. Descriptive and chi-square analyses were used to address: (1) What are the communication abilities of children in the first 5 years of life? (2) What do New Zealand parents understand of their children's communication? (3) Do New Zealand parents have concerns? (4) What are the trajectories of parental concern for children's communication in the first 6 years of life? At 24 months old, 16% of children had communication skills that were of concern to their parents. At 54 months, there were concerns for 12.6% of children. Although most parents were able to describe their child's expressive abilities, many parents remained unconcerned when their child demonstrated communication skills that did not met developmental expectations. Parents can offer valuable insights about their children, but in many cases their level of concern about SLCN did not align with a professional view which reflects a more nuanced understanding of children's speech and language and the impact on future communication skills and needs. Increased awareness through public health messaging specifically regarding lifelong influences of communication challenges will aid in prevention, early detection and intervention. What is already known on this subject Parent's expectations of child speech and language development will inform how responsive they are to difficulties in their child. Appropriate parental concern is key to recognition of children with speech, language and communication needs that warrant referral to a professional. What this paper adds to existing knowledge Parents are aware of expressive language skills that children acquire and can accurately identify their children's skills but have less knowledge of the ages of acquisition. Some parents are not concerned, do not seek support despite recognisable difficulties, and demonstrate limited understanding of the future consequences for children with communication needs that are unmet. What are the potential or actual clinical implications of this work? Public health messaging should include both skills and age ranges for speech and language acquisition. Additionally, educating the public of the impact of speech, language and communication skills on children's futures is needed.

Children`s dietary patterns and their maternal determinants during the first 5 years of life: Information from the Growing Up in New Zealand cohort

Monitoring indicators of children`s diet quality at the national level is imperative to examine if a country is on track to achieving children`s global nutrition targets and fulfilling the related Sustainable Development Goals. Despite the importance of diet quality in early life and its impact in health and wellbeing throughout the life course, Aotearoa New Zealand has limited information that is nationally representative or generalizable on children`s diet quality, especially among children under 5 years old. The only national child nutrition survey conducted to date took place two decades ago and involved children 5 years of age and older. We have previously used data collected by the Growing in Up in New Zealand cohort study, which is nationally generalizable, to partially fill historic gaps in knowledge of children`s diet and feeding practices in the first five years of life. Information on breastfeeding initiation, duration and exclusivity, timing of food introduction and whole-of-diet adherence to National Food and Nutrition Guidelines have been previously published 1–3. This work intends to complement information on NZ children`s diet quality by examining the cohort`s dietary patterns (DPs) at 9- (n = 6,259), 24- (n = 6,292), and 54-months (n = 6,131) and their maternal sociodemographic and health behaviour determinants. At all time-points, children`s DPs were identified using principal components analyses. Multivariate linear regressions were performed to examine the associations between each DP and the maternal variables. At 9-, 24- and 54-months two distinct DPs were identified, explaining, 36.4%, 35.3% and 33.6% of children`s intake variability, respectively. The Refined high in sugar and salt DP, at all time-points, was characterised by high positive loadings in white/refined breads and cereals and items with high content of sugar, sodium, and fat. At 24-months, the Refined high in sugar and salt DP also had high positive loading in the protein group. The Fruit/Vegetables DP, at all time-points, had high positive loadings for fruits and vegetables (with type varying across time-points). The Fruit/Vegetables DP had high loading in whole grain options of breads and cereals at 24-months and positive loading in the protein group at 9- and 54-months. High scores on the Refined high in sugar and salt DP at the three time-points were associated with maternal smoking habits, maternal education level, ethnicity, and maternal scores in the “Junk” and “Traditional/White bread” DPs (obtained at the antenatal maternal interview). High children’s scores on the Fruit/Vegetables DP, at all time-points, were associated with the maternal antenatal score in the “Health Conscious” DP. Findings support that policies and interventions aiming to improve early life diets in NZ should be culturally safe and support mothers’ access to formal education, healthy diets, and smoking cessation.

Health-related quality of life following trauma: Prevalence of problems and factors associated with six-month outcomes in a New Zealand cohort

Injury is a leading cause of health loss in Aotearoa me Te Waipounamu (New Zealand; NZ). The NZ Trauma Registry was established in 2015 to monitor outcomes in those experiencing severe injury and to identify ways of improving the quality of care for these patients. Few NZ studies have assessed outcomes in trauma patients using patient-reported outcome measures (PROMs) despite increasing recognition that the impacts of injury are better understood through PROMs. Our aim was to estimate the prevalence of self-reported problems with health-related quality of life (HRQoL) outcomes six months post-injury, and identify factors associated with these, in a cohort of Māori (the Indigenous population of NZ) and non-Māori individuals who had experienced major trauma. HRQoL outcomes were measured according to the five dimensions of the EQ-5D-5L. This information, along with sociodemographic data, was collected via structured telephone interviews. Participants (n=870), aged 16 years or more, were recruited following admission to a trauma hospital in one of three (of NZ's four) trauma regions. Multivariable models were developed using modified Poisson Regression to identify factors associated with outcomes for both Māori and non-Māori patients. The prevalence and severity of problems across each of the five EQ-5D-5L dimensions was similar for Māori and non-Māori except for Anxiety/Depression. The prevalence and severity of problems with Anxiety/Depression was greater for Māori. Factors associated with HRQoL problems at six-months were also largely similar for each cohort. Those commonly associated with outcomes were age, hospital length of stay, adequacy of household income, and participants’ expectations regarding recovery from injury. Further research examining recovery expectations in trauma patients to determine which factors contribute to formulating recovery expectations, and the potential impact of recovery expectations on treatment and rehabilitation, would be of value. Should expectations, at least in part, influence HRQoL outcomes, then routinely collecting data on patients’ recovery expectations, adequacy of household income and potential barriers to treatment and rehabilitation, could help inform post-hospital treatment plans, and identify those who may require additional support following discharge from hospital.

Maternal determinants of dietary patterns in infancy and early childhood in the Growing up in New Zealand cohort

Given the importance of diet in early life, assessing children’s diet is crucial to guide interventions. Using data from a nationally generalizable New Zealand (NZ) birth cohort we examined children’s dietary patterns at 9- (n = 6259), 24- (n = 6292), and 54-months (n = 6131), and their association with maternal sociodemographic and health behaviours. At each time-point, children's dietary patterns were identified using principal components analysis. We then used multivariate linear regression to examine associations between each pattern and maternal variables. At 9-, 24- and 54-months, two dietary patterns were identified, explaining 36.4%, 35.3% and 33.6% of children's intake variability, respectively. Refined high in sugar, salt and fat dietary pattern, at all time-points, was characterized by high positive loadings in white/refined breads and cereals, and items with high sugar, sodium, and fat content. At 24-months, Refined high in sugar, salt and fat also included a high positive loading with protein food groups. Fruit and vegetables dietary pattern, at all time-points, had high positive loadings for fruits and vegetables (with type varying across time-points). Fruit and vegetables also included high loading in whole grain options of breads and cereals at 24-months and the protein food group was part of this dietary pattern at 9- and 54-months. Children’s scores on the Refined high in sugar, salt and fat pattern had strong associations with maternal smoking habits, education level, ethnicity, and maternal scores in the “Junk” and “Traditional/White bread” dietary patterns (constructed from an antenatal interview). Children’s scores on the Fruit and vegetables pattern had strong associations with the maternal scores in the dietary pattern “Health Conscious”. Interventions to improve diet in early life in NZ need to be responsive to ethnicity and suitable for people of all education levels. Interventions that improve maternal health behaviours may also improve children’s diet.

Maternal reminiscing during middle childhood: Associations with maternal personality and child temperament from the Growing Up in New Zealand cohort study.

The way that mothers talk about the past (reminisce) with young children is linked to key memory, language, and socioemotional outcomes. The present research explored the role of a range of child, maternal, socioeconomic, and cultural factors that predict maternal reminiscing style, with a particular focus on maternal personality and child temperament. A total of 1,404 mother-child dyads from the prebirth longitudinal cohort study Growing Up in New Zealand (https://www.growingup.co.nz) participated in a reminiscing task about a negative event when children were 8 years old. This broader cohort is broadly representative of the New Zealand population in terms of maternal ethnicity and socioeconomic status. Conversations were scored using a revised version of the Elaborative Reminiscing Scale. Child temperament during infancy, but not childhood, uniquely predicted maternal reminiscing style. Maternal extraversion also predicted a more elaborative reminiscing style. Other maternal factors, including education, ethnicity, and age, were also identified as unique predictors of maternal reminiscing style. These findings fit well with an ecological systems view of maternal reminiscing as a function of child, maternal, and cultural factors. (PsycInfo Database Record (c) 2023 APA, all rights reserved).

Gut microbiota profiles in two New Zealand cohorts with overweight and prediabetes: a Tū Ora/PREVIEW comparative study.

Obesity-related metabolic diseases such as type 2 diabetes (T2D) are major global health issues, affecting hundreds of millions of people worldwide. The underlying factors are both diverse and complex, incorporating biological as well as cultural considerations. A role for ethnicity - a measure of self-perceived cultural affiliation which encompasses diet, lifestyle and genetic components - in susceptibility to metabolic diseases such as T2D is well established. For example, Asian populations may be disproportionally affected by the adverse 'TOFI' (Thin on the Outside, Fat on the Inside) profile, whereby outwardly lean individuals have increased susceptibility due to excess visceral and ectopic organ fat deposition. A potential link between the gut microbiota and metabolic disease has more recently come under consideration, yet our understanding of the interplay between ethnicity, the microbiota and T2D remains incomplete. We present here a 16S rRNA gene-based comparison of the fecal microbiota of European-ancestry and Chinese-ancestry cohorts with overweight and prediabetes, residing in New Zealand. The cohorts were matched for mean fasting plasma glucose (FPG: mean ± SD, European-ancestry: 6.1 ± 0.4; Chinese-ancestry: 6.0 ± 0.4 mmol/L), a consequence of which was a significantly higher mean body mass index in the European group (BMI: European-ancestry: 37.4 ± 6.8; Chinese-ancestry: 27.7 ± 4.0 kg/m2; p < 0.001). Our findings reveal significant microbiota differences between the two ethnicities, though we cannot determine the underpinning factors. In both cohorts Firmicutes was by far the dominant bacterial phylum (European-ancestry: 93.4 ± 5.5%; Chinese-ancestry: 79.6 ± 10.4% of 16S rRNA gene sequences), with Bacteroidetes and Actinobacteria the next most abundant. Among the more abundant (≥1% overall relative sequence abundance) genus-level taxa, four zero-radius operational taxonomic units (zOTUs) were significantly higher in the European-ancestry cohort, namely members of the Subdoligranulum, Blautia, Ruminoclostridium, and Dorea genera. Differential abundance analysis further identified a number of additional zOTUs to be disproportionately overrepresented across the two ethnicities, with the majority of taxa exhibiting a higher abundance in the Chinese-ancestry cohort. Our findings underscore a potential influence of ethnicity on gut microbiota composition in the context of individuals with overweight and prediabetes.

Cardiovascular risk prediction in a New Zealand cohort of patients with known cardiovascular disease - a regional individual patient-level data linkage study

Abstract Background National health databases have been underutilised in the development of cardiovascular disease (CVD) risk prediction equations for people with known CVD, yet can inform population level practice and policy—including identification of health equity gaps, high-risk groups, and high-risk localities. With the recent introduction of novel and expensive preventive cardiovascular drugs, stratifying risk in patients with prior CVD could be required to inform cost-effective use of these medications in the future. Purpose We sought to develop 5-year CVD risk equations in adults with known history of CVD in Aotearoa New Zealand, using data from administrative health databases and characterize distribution of risk according to sex. Methods All people above 18 years of age with a history of CVD hospitalization, living in the Auckland and Northland regions of Aotearoa New Zealand (approximately one-third of the national population) on 1 January 2014 were included. Participants were followed for 5 years (31 December 2018) or until death or the outcome of interest, being any fatal or non-fatal CVD hospitalization (ischemic heart disease, heart failure, ischemic stroke, or peripheral artery disease) during follow-up. Sex-specific 5-year CVD risk prediction equations were developed using multivariable Fine and Gray models taking competing risk of non-cardiovascular death into account. Predictor variables included were age; ethnicity; deprivation level; time since most recent CVD hospitalization, history of smoking, heart failure, atrial fibrillation, chronic renal disease, and diabetes mellitus; use of anti-thrombotic, blood pressure-lowering, and lipid-lowering drugs; and blood levels of glycosylated hemoglobin (HbA1c), non-HDL cholesterol, and creatinine. Results The cohort comprised 42,130 men (median age: 68 years [interquartile range (IQR): 59–76]) and 31,717 women (median age: 70 years [IQR: 60–78]) with 12,875 and 8,734 observed events during follow-up, respectively. Sex-specific 5-year CVD risk prediction equations with excellent calibration (accuracy) were developed (Figure 1). Increasing age; high deprivation level; more recent CVD hospitalization; history of smoking, heart failure, atrial fibrillation, chronic renal disease, diabetes mellitus; use of blood-pressure lowering drugs; and high blood levels of HbA1c, non-HDL cholesterol, or creatinine were predictors of elevated risk. There was a wide range of predicted 5-year risk, with 15% of men and 24% of women having a predicted risk below 15%, and 24% and 20%, respectively, having a predicted risk of 40% or above (Figure 2). Conclusion This study demonstrates that it is possible to develop accurate CVD risk prediction equations from administrative health databases for patients with known CVD. Marked heterogeneity in 5-year risk of a subsequent CVD event emphasise that the current ‘one size fits all’ approach to secondary prevention of CVD requires review.Figure 1Figure 2

Clinical predictors of rectal cancer response after neo-adjuvant (Chemo)Radiotherapy in Australia and New Zealand: Analysis of the Bi-National Colorectal Cancer Audit (BCCA)

Pathological complete response (pCR) is observed in 11–26% of locally advanced rectal cancers undergoing neoadjuvant chemoradiotherapy (nCRT). This study aims to determine pCR rates and clinicopathological predictors in the Australian and New Zealand (ANZ) cohort. The Bi-National Colorectal Cancer Audit (BCCA) was interrogated for all rectal cancer patients who underwent nCRT prior to surgical resection between 2007 and 2020. Patients were divided in two groups: pCR (AJCC tumour regression grade 0) and partial/no response (pPR, regression grade 1,2 or 3). In total, 3230 patients were included. Rates of pCR and pPR were 704 (21.8%) and 2526 (78.2%), respectively. Long-course nCRT (p < 0.0001), lower clinical tumour stage (cT; p < 0.0001), and nodal stage (cN; p = 0.003) were associated with pCR on univariate analysis. On multivariable analysis, cN0 stage and long-course nCRT remained independent factors for a pCR. Awareness of these predictors provides valuable information when counseling patients regarding prognosis and treatment options.

Robust immunogenicity of a third BNT162b2 vaccination against SARS-CoV-2 Omicron variant in a naïve New Zealand cohort

The ability of a third dose of the Pfizer-BioNTech BNT162b2 SARS-CoV-2 vaccine to stimulate immune responses against subvariants, including Omicron BA.1, has not been assessed in New Zealand populations. Unlike many overseas populations, New Zealanders were largely infection naïve at the time they were boosted. This adult cohort of 298 participants, oversampled for at-risk populations, was composed of 29% Māori and 28% Pacific peoples, with 40% of the population aged 55+. A significant proportion of the cohort was obese and presented with at least one comorbidity. Sera were collected 28 days and 6 months post second vaccination and 28 days post third vaccination. SARS-CoV-2 anti-S IgG titres and neutralising capacity using surrogate viral neutralisation assays against variants of concern, including Omicron BA.1, were investigated. The incidence of SARS-CoV-2 infection, within our cohort, prior to third vaccination was very low (<6%). This study found a third vaccine significantly increased the mean SARS-CoV-2 anti-S IgG titres, for every demographic subgroup, by a minimum of 1.5-fold compared to titres after two doses. Diabetic participants experienced a greater increase (∼4-fold) in antibody titres after their third vaccination, compared to non-diabetics (increase of ∼ 2-fold). This corrected for the deficiency in antibody titres within diabetic participants which was observed following two doses. A third dose also induced a neutralising response against Omicron variant BA.1, which was absent after two doses. This neutralising response improved regardless of age, BMI, ethnicity, or diabetes status. Participants aged ≥75 years consistently had the lowest SARS-CoV-2 anti-S IgG titres at each timepoint, however experienced the greatest improvement after three doses compared to younger participants. This study shows that in the absence of prior SARS-CoV-2 infection, a third Pfizer-BioNTech BNT162b2 vaccine enhances immunogenicity, including against Omicron BA.1, in a cohort representative of at-risk groups in the adult New Zealand population.

DynamX sirolimus-eluting Bioadaptor versus the zotarolimus-eluting Resolute Onyx stent in patients with de novo coronary artery lesions: Design and rationale of the multi-center, international, randomized BIOADAPTOR-RCT

BackgroundConventional drug-eluting stents achieve good safety and performance outcomes, but the stents permanently cage the vessel, leading to a non-plateauing rate of clinical events. The DynamX Bioadaptor is designed to reduce these long-term events through unique design features that permit restoring vessel function and physiology through the disengagement of uncaging elements after the resorption of a biodegradable polymer over six months. Promising initial results have been obtained in the DynamX mechanistic study, with excellent safety and effectiveness, positive arterial remodeling, improved vasomotion, compliance, and cyclic pulsatility. We now aim to confirm these findings randomizing the DynamX Bioadaptor against the Resolute Onyx stent. MethodsThis multi-center, international, randomized single-blinded study is conducted in 34 sites across Europe, Japan, and New Zealand and is divided into the European/New Zealand cohort and the Japanese cohort (which includes an imaging subset). It is designed to randomly assign 444 patients (222 per region) in a 1:1 ratio to either the DynamX Bioadaptor or the Resolute Onyx stent. Furthermore, a pharmacokinetic substudy is conducted in 9 patients enrolled in Japan to assess the pharmacokinetics of sirolimus after implantation of the DynamX Bioadaptor. Study follow-up is scheduled at one, six, and 12 months, and annually thereafter for five years; imaging follow-up includes angiographic, intravascular ultrasound, and optical coherence tomography assessments at 12 months in a subset of patients. The primary endpoint is 12-month target lesion failure. ConclusionsThis trial will provide valuable insights into the safety and efficacy of this novel bioadaptor when compared to a contemporary drug-eluting stent. Condensed abstractThe DynamX Sirolimus-Eluting Bioadaptor has unique design features aiming to reduce long-term events after percutaneous coronary intervention by permitting the restoration of vessel function through the freeing of uncaging elements. Promising initial results have been obtained in the DynamX mechanistic study. This trial aims to confirm these findings in a randomized setting. The European/ New Zealand and Japanese cohorts were designed to randomly assign 444 subjects in a 1:1 ratio to either the DynamX Bioadaptor or the Resolute Onyx stent. Furthermore, a pharmacokinetic substudy is conducted in 9 patients enrolled in Japan to assess the pharmacokinetics of sirolimus.

The incidence, impact, and risk factors for moderate to severe persistent pain after breast cancer surgery: a prospective cohort study.

Few Australasian studies have evaluated persistent pain after breast cancer surgery. To evaluate the incidence, impact, and risk factors of moderate to severe persistent pain after breast cancer surgery in a New Zealand cohort. Prospective cohort study. Consented patients were reviewed at 3 timepoints (preoperative, 2 weeks and 6 months postoperative). Pain incidence and interference, psychological distress and upper limb disability were assessed perioperatively. Clinical, demographic, psychological, cancer treatment-related variables, quantitative sensory testing, and patient genotype (COMT, OPRM1, GCH1, ESR1, and KCNJ6) were assessed as risk factors using multiple logistic regression. Of the 173 patients recruited, 140 completed the 6-month follow-up. Overall, 15.0% (n = 21, 95% CI: 9.5%-22.0%) of patients reported moderate to severe persistent pain after breast cancer surgery with 42.9% (n = 9, 95% CI: 21.9%-66.0%) reporting likely neuropathic pain. Pain interference, upper limb dysfunction and psychological distress were significantly higher in patients with moderate to severe pain (P < .004). Moderate to severe preoperative pain (OR= 3.60, 95% CI: 1.13-11.44, P = .03), COMT rs6269 GA genotype (OR = 5.03, 95% CI: 1.49-17.04, P = .009) and psychological distress at postoperative day 14 (OR= 1.08, 95% CI: 1.02-1.16, P = .02) were identified as risk factors. Total intravenous anesthesia (OR= 0.31, 95% CI: 0.10 - 0.99, P = .048) was identified as protective. The incidence of moderate to severe persistent pain after breast cancer surgery is high with associated pain interference, physical disability, and psychological distress. Important modifiable risk factors were identified to reduce this important condition.

Understanding the pathways between prenatal and postnatal factors and overweight outcomes in early childhood: a pooled analysis of seven cohorts

Background/objectivesChildhood overweight and obesity are influenced by a range of prenatal and postnatal factors. Few studies have explored the integrative pathways linking these factors and childhood overweight. This study aimed to elucidate the integrative pathways through which maternal pre-pregnancy body mass index (BMI), infant birth weight, breastfeeding duration, and rapid weight gain (RWG) during infancy are associated with overweight outcomes in early childhood from ages 3 to 5 years.Subjects/methodsPooled data from seven Australian and New Zealand cohorts were used (n = 3572). Generalized structural equation modelling was used to examine direct and indirect associations of maternal pre-pregnancy BMI, infant birth weight, breastfeeding duration, and RWG during infancy with child overweight outcomes (BMI z-score and overweight status).ResultsMaternal pre-pregnancy BMI was directly associated with infant birth weight (β 0.01, 95%CI 0.01, 0.02), breastfeeding duration ≥6 months (OR 0.92, 95%CI 0.90, 0.93), child BMI z-score (β 0.03, 95%CI 0.03, 0.04) and overweight status (OR 1.07, 95%CI 1.06, 1.09) at ages 3–5 years. The association between maternal pre-pregnancy BMI and child overweight outcomes was partially mediated by infant birth weight, but not RWG. RWG in infancy exhibited the strongest direct association with child overweight outcomes (BMI z-score: β 0.72, 95%CI 0.65, 0.79; overweight status: OR 4.49, 95%CI 3.61, 5.59). Infant birth weight was implicated in the indirect pathways of maternal pre-pregnancy BMI with RWG in infancy, breastfeeding duration, and child overweight outcomes. The associations between breastfeeding duration (≥6 months) and lower child overweight outcomes were fully mediated by RWG in infancy.ConclusionsMaternal pre-pregnancy BMI, infant birth weight, breastfeeding duration and RWG in infancy act in concert to influence early childhood overweight. Future overweight prevention interventions should target RWG in infancy, which showed the strongest association with childhood overweight; and maternal pre-pregnancy BMI, which was implicated in several pathways leading to childhood overweight.

Age at first exposure to antibiotics and neurodevelopmental outcomes in childhood

RationaleViral illnesses in children are common and are frequently treated with antibiotic medication. Antibiotics reduce the diversity and composition of the gut microbiota, leading to poor developmental outcomes.ObjectivesTo investigate the relationship between age at first exposure to antibiotics and cognitive and behavioural development at 4.5 years while controlling for multiple confounders, including otitis media.MethodsStudy participants were 5589 children enrolled in the broadly generalisable Growing Up in New Zealand cohort study, with antibiotic exposure data, maternal antenatal information, and age 4.5-year behaviour and cognitive outcome data. Children were categorised as first exposed to antibiotics according to the following mutually exclusive ages: 0–2 months; 3–5 months; 6–8 months; 9–11 months; 12–54 months or not exposed by 54 months. Developmental outcome measures included the Strengths and Difficulties Questionnaire, Luria hand clap task, and the Peabody Picture Vocabulary Test-III.ResultsIn univariate analysis, there was an evident dose–response relationship where earlier exposure to antibiotics in the first year of life was associated with behavioural difficulties, lower executive function scores, and lower receptive language ability. After adjusting for confounders, pairwise comparisons showed that first antibiotic exposure between birth and 3 months or between 6 and 9 months was associated with lower receptive vocabulary. Antibiotic exposure at any age prior to 12 months was associated with increases in behavioural difficulties scores at 4.5 years.ConclusionsFollowing adjustment for socioeconomic factors and otitis media, there is evidence that antibiotic exposure during potentially sensitive windows of development is associated with receptive language and behaviour later in childhood.