Conditional Logistic Regression Research Articles

Left atrial strain is associated with cardiovascular outcomes in children with congenitally corrected transposition of the great arteries

Abstract Background The assessment of the systemic right ventricular (sRV) function in congenitally corrected transposition of the great arteries (ccTGA) by echocardiography is restricted by its complex geometry. Purpose To determine the utility of left atrial strain (LAS) and sRV longitudinal strain (sRV-LS) in the prediction of outcomes in children with ccTGA. Methods This nested case-control study included all patients <21 years old with unrepaired ccTGA at our tertiary pediatric institution who had an echocardiogram prior to cardiovascular outcomes (milrinone-dependent heart failure, ventricular assistant device, heart transplant or death). LAS (both R wave and P wave references) and sRV-LS were measured using TomTec AutoStrain. To account for potential confounders, cases and controls were matched (1 cases vs 3 controls) by age ± 1 year and tricuspid regurgitation (TR) severity (none/mild vs. moderate/severe). Univariable conditional logistic regression was employed to assess the association between LAS and sRV-LS with outcomes among matched patients. Results Of 101 patients (64% male) with echocardiogram performed at 1.78 years old (IQR 0.02, 9.80), 14 (14%) developed an outcome. Baseline characteristics, LAS, and sRV-LS are depicted in Table 1. LAS and sRV-LS were not discriminative between age-matched cases and controls. In the matched cases and controls for TR severity, each unit-increase in LAS conduit phase (LAScd R and LAScd P) was associated with 18% and 22% higher odds of outcomes respectively, although these did not achieve statistical significance (LAScd R OR 1.2, 95% CI 1.0-1.4, p=0.09; LAScd P OR 1.2, 95% CI 1.0-1.5, p=0.08, Table 2). Conclusions After controlling for TR severity as a potential confounding factor, the conduit phase of LAS by both R wave and P wave references may have clinical implications as predictors of cardiovascular outcomes in patients with ccTGA. Larger and more well-powered studies are needed to further evaluate this association and studying longitudinal changes in LAS may provide insight in the development of outcomes in this population.

Low ambient temperature and incident myocardial infarction with or without obstructive coronary arteries: a Chinese nationwide study.

Although non-optimum ambient temperature is a major non-traditional risk factor for acute myocardial infarction, there is no prior knowledge on whether non-optimum ambient temperature could differentially affect myocardial infarction with obstructive coronary artery disease (MI-CAD) and myocardial infarction with non-obstructive coronary arteries (MINOCA). Using the Chinese Cardiovascular Association database-Chest Pain Center Registry, a nationwide, time-stratified, case-crossover investigation was conducted from 2015 to 2021. Meteorological data were obtained from an established satellite-based model, and daily exposures were assigned according to the onset of myocardial infarction in each patient. A conditional logistic regression model combined with distributed lag non-linear models (10 days) was used to estimate the exposure-response relationships. A total of 83 784 MINOCA patients and 918 730 MI-CAD patients were included. The risk of MINOCA and MI-CAD associated with low temperature occurred at lag 2 day and lasted to 1 week. Extremely low temperature was associated with a substantially greater odds ratio (OR) of MINOCA [OR 1.58, 95% confidence interval (CI) 1.31-1.90] than MI-CAD (unmatched: OR 1.32, 95% CI 1.23-1.43; equally matched by age and sex: OR 1.25, 95% CI 1.04-1.50), compared with the corresponding reference temperatures (30°C, 35°C, and 30°C). Stronger associations were observed for patients who were aged ≥65 years, female, or resided in the south. There was no significant difference for the impacts of high temperature on MINOCA and MI-CAD. This nationwide study highlights the particular susceptibility of MINOCA patients to ambient low temperature compared with that of MI-CAD patients.

Co-administration of COVID-19 and flu vaccines in healthcare workers: results from three campaigns

Abstract The COVID-19 pandemic, along with seasonal influenza, highlights the need for innovative public health strategies. Co-administering COVID-19 and influenza vaccines offers advantages for healthcare workers (HCWs), streamlining vaccination efforts and enhancing public health resilience. Recent evidence supports the safety and efficacy of this approach, endorsed by health authorities worldwide. However, its acceptance remains a concern. This study explores HCWs’ acceptance of vaccine co-administration in three campaigns post the introduction of the anti-SARS-CoV-2 vaccine. During three consecutive flu seasons from October 2021 to January 2024, a cross-sectional study was conducted in a large Italian teaching hospital. Data for 2021/2022, 2022/2023 and 2023/2024 were compared, focusing on healthcare workers present in all datasets. McNemar’s test examined changes in acceptance of co-administration. In addition, a conditional logistic regression model was designed to assess the determinants of co-administration through the vaccination campaigns in the three years. During these vaccination campaigns 7457 HCWs were observed (62.78% women, median age 43). Co-administration surged, particularly in 2022/2023, showing a 280.71% increase, consistent across all professional categories (p < 0.001). Controlling for gender and professional category, acceptance of coadministration showed a significant association respectively with “open days” twice a month (OR 2.9 CI [2.7; 3.6]) and a hospital vaccination clinic two days a week on weekdays (OR 4.5 CI [4.1; 5.4]) compared to conducting vaccinations at a clinic open everyday during the campaign period; no association was highlighted with age. This study investigates a facet of an increasingly significant topic, demonstrating that co-administering vaccines for SARS-CoV-2 and influenza is emerging as an effective strategy in annual vaccination campaigns, thanks to its safety and the streamlining of logistical and organizational processes. Key messages • The co-administration of vaccines offers a promising strategy to enhance vaccination rates among healthcare workers. • By identifying factors influencing acceptance, it aims to inform targeted interventions for maximizing vaccine uptake and public health resilience.

The Effect of Multidisciplinary Care on Polypharmacy in Advanced Cancer Patients near the End of Life

Abstract Objectives Multidisciplinary Team (MDT) aims to integrate cancer patient care plans and provide holistic care to improve clinical outcomes and quality of life. However, there is a lack of empirical evidence regarding the effect of MDT on polypharmacy in advanced cancer patients near the end of life, which warrants further investigation. Methods This retrospective cohort study utilizes the National Health Insurance Research Database (NHIRD), Taiwan Cancer Registry, and Cause of Death Statistics, provided by the Health and Welfare Data Science Center (HWDC), Ministry of Health and Welfare (MOHW). The study subjects were patients who were diagnosed with stage III or IV cancer, aged 65 or above, experienced recurrence or metastasis, and who died between 2014 and 2020. Propensity score matching (PSM) was employed, followed by analysis using the Generalized Estimating Equation (GEE) to examine the differences in the risk of polypharmacy in the last 30 days before death. In addition, to confirm the robustness of the results, we conducted two different sensitivity tests: the first way is to use different ages as sample selection criteria and only include people who died over 75 years old as study subjects; the second way is to use conditional logistic regression models as a multivariate statistical method. Results There were 35537 samples before matching, including 4942 who received MDT care and 30595 who did not. After 1:1 matching, 9884 patients were finally included in the analysis. The prevalence of polypharmacy significantly decreased during the study period from 59.90% to 58.80% (p = 0.03; trend test). When examined through different PIM criteria, patients who received care from MDT exhibited a lower risk of polypharmacy (OR = 0.91, 95% CI = 0.84-0.98). Conclusions Advanced cancer patients who received care from MDT during the end-of-life period had a significantly lower risk of polypharmacy. Key messages • The prevalence of polypharmacy significantly decreased during the study period from 2014 to 2020 among advanced cancer patients. • Advanced cancer patients who received care from MDT during the end-of-life period had a significantly lower risk of polypharmacy.

Effects of short-term exposures to lower air temperature and cold spells on myocardial infarction hospital admissions: a nationwide study in Sweden

Abstract Background Exposures to lower air temperature and cold spells have been associated with an increased risk of various diseases. However, the short-term effect of lower air temperature and cold spells on myocardial infarction (MI) remains incompletely understood. Purpose We aimed to evaluate the short-term effects of lower air temperature and cold spells on MI hospital admissions within the nationwide SWEDEHEART registry. Methods This population-based nationwide study included 120,380 MI cases admitted to hospitals in Sweden during the cold season (October to March) from 2005 to 2019. Daily mean air temperature was estimated at 1 km2 spatial resolution across Sweden using a three-stage machine learning approach and percentiles of daily temperatures experienced by individuals in the same municipality were employed as individual exposure indicators to account for potential geographic adaptation. Cold spells were defined as periods of at least two consecutive days with a daily mean temperature below the 10th percentile of the temperature distribution for each municipality. A time-stratified case-crossover design incorporating a conditional logistic regression model with distributed lag non-linear model using lag 0-1 and lag 2-6 days was employed to evaluate the short-term effects of lower air temperature and cold spells on total MI, non-ST-segment elevation MI (NSTEMI) and ST-segment elevation MI (STEMI). Results We found significant increases in risk for total MI, NSTEMI, and STEMI in association with a decrease of one percentile in temperature at a lag of 2-6 days, indicated by ORs (95% CI) of 1.099 (1.057-1.142), 1.110 (1.06-1.164), and 1.076 (1.004-1.153), respectively. Additionally, we found that cold spells were significantly associated with increased risks for total MI, NSTEMI, and STEMI at a lag of 2-6 days, with ORs (95% CI) of 1.077 (1.037-1.12), 1.069 (1.02-1.119), and 1.095 (1.023-1.172), respectively. Moreover, independent effects of lower air temperature and cold spells on MI occurrence were found after adjusting for each other. Conversely, we observed that lower air temperature and cold spells were associated with decreased risks for MI at a lag of 0-1 days. Conclusions This nationwide case-crossover study demonstrated a novel biphasic pattern in MI risk following exposure to lower air temperatures and cold spells, characterized by an initial transient reduction in risk at lags 0-1 day, followed by a significant increase in risk at lags 2-6 days. As climate change continues to induce complex shifts in regional weather patterns, enhancing protections to reduce future cold-related cardiac hospitalizations is crucial.

Increased risk of cardiovascular events in the weeks following hospitalised COPD exacerbations: the EXACOS-CV French nationwide case-crossover study

Abstract Introduction Previous studies indicate that in people living with chronic obstructive pulmonary disease (COPD), the risk of myocardial infarction (MI), heart failure (HF) decompensation, arrhythmias and ischemic stroke increases following a COPD exacerbation. This association has not been explored for detailed types of cardiovascular events (CVE), namely for different types of myocardial infarction. Objective To quantify the risk of CVE following a COPD exacerbation overall, and by detailed type of CVE. Methods A case-crossover study was conducted using the French national hospital discharge database (Programme de Médicalisation des Systèmes d'Information, PMSI). Case-patients: (i) were aged≥40 years with a COPD diagnosis; (ii) hospitalised in 2018-2019 for CVE; (iii) experienced the CVE within 24 weeks of a hospitalised exacerbation of COPD. Hospitalisation date for CVE was index date. Conditional logistic regression models estimated the association between a hospitalised exacerbation and CVE (overall and by type of CVE) – expressed as odds ratios (OR) – comparing the odds of a hospitalised COPD exacerbation during the risk period (4 weeks prior to index date) versus control periods (9-24 weeks prior to index date). Results Among 122,172 patients with COPD hospitalised for a severe CVE in 2018-2019, 9,840 (8%) had a hospitalised exacerbation of COPD in the prior 24 weeks and qualified as case-patients. Mean age was 76.8 years (SD 10.7); 6,496 (66%) were male. The most frequent CVE were decompensated heart failure (n=5,888, 60%) and acute coronary syndrome (n=1,070, 11%); in-hospital death in the 24 weeks following an exacerbation of COPD occurred in 950 (10%) patients. Median time elapsed between hospitalised exacerbation and CVE (any type) was 43 days (Figure 1); the shortest delays were observed for non-STEMI (24 days) and resuscitated cardiac arrest (28 days). Risk of CVE in the 4 weeks following a hospitalised COPD exacerbation was 3-times the risk in the 9-24 weeks post-exacerbation (OR 3.0; 95%CI 2.9-3.2 – Figure 2). This increase in risk was observed for each individual type of CVE. The highest effect size was observed for non-STEMI (OR 5.3; 95%CI 4.5-6.3). Conclusion The risk of CVE substantially increases following a hospitalised exacerbation of COPD overall and for all types of CVE (acute ischemic events, arrhythmias, and heart failure decompensation). The first month following a hospitalised exacerbation is a period of vulnerability for people living with COPD, with some variability in the magnitude and temporality of risk increase according to the type of CVE. These results stress the need for immediate and sustained monitoring of exacerbating COPD patients to prevent a subsequent severe cardiac event. In addition, exacerbations prevention is an essential target of COPD treatment.

The association between drugs and vaccines commonly prescribed to older people and bullous pemphigoid: a case-control study.

Bullous pemphigoid (BP) is an autoimmune skin disease that affects mainly older people. Numerous drugs have been previously associated with BP based on case series and small hospital-based studies. More reliable and precise estimates of associations between a broad selection of drugs/vaccines and BP will enable greater awareness of potential increased risk of BP following certain medicines and help identify clinical, histological and genomic characteristics of drug-induced BP for different types of culprit drugs. Greater awareness could lead to earlier recognition or suspicion of BP and referral to a dermatologist for diagnosis. Earlier diagnosis may lead to less aggressive treatment and improved well-being. To determine the association between drugs/vaccines commonly prescribed to older people and BP risk. We conducted a population-based nested case-control study between 1998-2021 using electronic primary care records from the Clinical Practice Research Datalink. We matched BP cases with up to 5 controls. Exposures were drugs/vaccines commonly prescribed to older people. We used multivariable conditional logistic regression adjusting for multiple drug use. For antibiotics, we considered prescriptions may be prescribed for undiagnosed symptoms of BP which resemble skin infection (protopathic bias) in a sensitivity analysis. Antibiotics were the therapeutic group associated with the highest risk of BP (OR: 4.60; 95%CI 4.40-4.80). However, after adjusting for protopathic bias, the OR reduced to 2.08 (95%CI 1.99-2.17). After adjusting for protopathic bias, of all antibiotic classes and subclasses, penicillins and penicillinase-resistant penicillins had the strongest associations with BP risk (OR: 3.44; 95%CI 3.29-3.60; sensitivity analysis OR; 1.74; 1.66-1.84 and OR: 7.56; 95%CI 7.15-8.00; sensitivity analysis OR: 2.64; 95%CI 2.45-2.85, respectively). Other drugs strongly associated with increased risk were gliptins (OR: 2.77; 95% CI 2.37-3.23), and second-generation antipsychotics (OR: 2.58; 95%CI 2.20-3.03). Healthcare professionals need to be aware of BP risk in older people particularly when prescribing penicillinase-resistant penicillins, gliptins, and second-generation antipsychotic drugs to recognise and manage BP early. Due to the low prevalence of disease, we do not suggest avoidance of drugs/vaccines to prevent BP. Further research should consider recency, dosage, and duration of antibiotic treatments.

Short-term effects of ambient temperature variability on myocardial infarction hospitalizations in Sweden: A nationwide case-crossover study

Abstract Background Climate change threatens human health and general welfare via multiple dimensions. However, the short-term effect of temperature variability, a crucial aspect of climate change, on myocardial infarction (MI) remains largely unexplored. Purpose We aimed to assess the short-term effects of temperature variability on MI hospitalizations within the nationwide SWEDEHEART registry. Methods This population-based nationwide study involved 228,897 MI patients from the SWEDEHEART registry in Sweden from 2005 to 2019. High-resolution (1 km × 1 km) daily mean ambient temperature was estimated using a spatiotemporal machine learning methodology and assigned to patients’ home addresses. Temperature variability was calculated as the difference between the same-day (as the MI event) ambient temperature and the average temperature recorded over the preceding seven days. Specifically, an upward temperature shift represents a rise in the current day’s temperature relative to the seven-day average, while a downward temperature shift indicates a corresponding decrease. A time-stratified case-crossover design incorporating a conditional logistic regression model with distributed lag non-linear model was applied to estimate the association between ambient temperature variability and total MI, ST-segment elevation myocardial infarction (STEMI) and non-ST-segment elevation myocardial infarction (NSTEMI). Moreover, we assessed potential effect modification by sex and medication intake. The results were expressed as odds ratio (OR, with their 95% confidence intervals [CIs]) per 1°C increase in temperature variability. Results Our study found that a 1°C increase in upward temperature shift was significantly associated with increased risks for total MI, STEMI, and NSTEMI (OR [95% CI]: 1.010 [1.006-1.015], 1.014 [1.006-1.022], and 1.009 [1.004-1.014], respectively). Furthermore, a 1°C greater in downward temperature shift was significantly associated with decreased risks for total MI and NSTEMI (OR [95% CI]: 0.995 [0.991-0.999], and 0.993 [0.988-0.998], respectively). Moreover, we found that males and patients who were on any heart medication, particularly digitalis, were at a higher risk of MI associated with exposure to higher upward temperature shifts compared to females and their counterparts not taking these medications. Conclusions This nationwide case-crossover study provides novel evidence that short-term exposure to increasing upward temperature shift is associated with an increased risk of MI hospitalization. Our finding highlights the cardiovascular health threats posed by upward temperature shifts, which are anticipated to increase in frequency and intensity due to climate change.

Factors Associated with Lipoprotein(a) Testing Among Multiethnic Individuals.

Lipoprotein(a) [Lp(a)] is a causal risk factor for atherosclerotic cardiovascular disease (ASCVD) and clinical guidelines recommend incorporating Lp(a) testing in routine care. Examine real-world, contemporary clinical testing patterns of Lp(a) among multiethnic populations. In this nested case-control study, we assessed the prevalence and factors associated with Lp(a) testing within a large Northern Californian health system between 2010 and 2021. Incident density matching was used to select controls matched with a case for a case:control ratio of up to 1:5. Conditional logistic regression was used to assess the relationship between Lp(a) testing, sociodemographic, and clinical characteristics. We included individuals aged 18years or older with ≥ 2 primary care visits during the study period. Lp(a) testing rates over time and factors associated with testing based on demographic, medical, and healthcare utilization variables. Of the 1,484,410 individuals in the cohort, 14,818 (1.0%) underwent Lp(a) testing. The median Lp(a) level was 35mg/dL and over a third of individuals had Lp(a) levels > 50mg/dL. After adjustment, South Asian individuals were three times more likely to have undergone Lp(a) testing, as compared to non-Hispanic White individuals [OR = 3.19, (95% CI = 2.98, 3.41)], while those identified as non-Hispanic Black and Hispanic were significantly less likely to have undergone Lp(a) testing [OR = 0.70, (95% CI = 0.62, 0.80) and 0.64 (95% CI = 0.59, 0.69), respectively]. Those with a history of ASCVD had over twice the odds of undergoing testing [OR = 2.14 (95% CI = 1.99, 2.29)], as did individuals with more frequent primary care visits [OR = 1.99 (95% CI = 1.84, 2.15)]. Lp(a) testing rates in real-world settings are low, with significant disparities by race, ethnicity, and healthcare utilization. Expanding access to Lp(a) testing may help reduce disparities within ASCVD risk assessment and treatment as new targeted therapeutic agents become available.

Human papillomavirus vaccine to prevent CIN3 or worse (CIN3+): A nationwide case-control study in Japan.

An increase in cervical cancer incidence has been reported in Japan. The Ministry of Health, Labor, and Welfare of Japan has resumed the active recommendation of regular HPV vaccines in 2022. In Japan, the preventive effect of CIN3+ in the real world has not yet been demonstrated in age-adjusted cohort or case-control studies. This study aimed to estimate the effect of the HPV vaccine against CIN3+ in Japanese women. This nationwide case-control study from April 2013 to March 2020 targeted women aged 20-26 years old at the time of cervical screening. We compared HPV vaccination exposure between those with abnormal and those with normal cytology. Abnormal cytology was classified into cervical intraepithelial neoplasia (CIN)1+, CIN2+, and CIN3+. We calculated the odds ratio (OR) and 95% confidence interval (CI) of the above endpoints and vaccination exposure using the conditional logistic regression model and estimated vaccine effectiveness using the formula (1 -OR) × 100. A total of 2790 cases and 13,990 controls (one-to-five matching) were eligible in 37 municipalities in Japan. In this study, 61 CIN3 (2.2%) and 10 squamous cell carcinomas (SCC) (0.4%) were found. The OR for CIN3+ versus controls was 0.14 (95% CI, 0.03-0.75), equating to a vaccine effectiveness of 86%. Of the 10 patients who had SCC none were vaccinated. This nationwide case-control study in Japan demonstrated a substantial risk reduction in CIN3+ among women who did versus those who did not receive HPV vaccination.

Roles of NR1I3 and NR1H4 polymorphisms in the susceptibility to antituberculosis drug-induced liver injury in China: a case‒control study

ObjectiveThe pathogenesis of antituberculosis drug-induced liver injury (AT-DILI) remains largely unknown. The current investigation aimed to determine the genetic contribution of the nuclear receptor subfamily 1 Group I member 3 (NR1I3) and nuclear receptor subfamily 1 Group H member 4 (NR1H4) genes to the risk of AT-DILI in the Chinese population.MethodsA 1:4 matched case‒control study was conducted, and five single nucleotide polymorphisms (SNPs) in the NR1I3 and NR1H4 genes were detected and assessed. Utilizing a multivariate conditional logistic regression model, the effects of haplotype and genotype on the risk of AT-DILI were examined. Extended subgroup analysis was carried out based on sex. The distribution of the peak value of serum liver enzymes also compared among different genotypes.Results224 AT-DILI cases and 896 controls were included in this study. No significant difference was observed in genotypes or haplotypes frequencies between AT-DILI cases and controls. However, comparisons of liver function indicators revealed significant differences in the peak values of alanine aminotransferase (ALT), aspartate aminotransferase (AST) and total bilirubin (TBil) among patients with different genotypes of NR1H4 rs56163822 (GG vs. GT vs. TT, 27.1 U/L vs. 26.0 U/L vs. 23.0 U/L, p = 0.020; 34.0 U/L vs. 31.0 U/L vs. 30.6 U/L, p = 0.008; 15.5 μmol/L vs. 15.0 μmol/L vs. 13.7 μmol/L, p = 0.029, respectively), as well as in the peak values of ALT and AST among male patients with different genotypes of NR1H4 rs56163822 (29.0 U/L vs. 26.9 U/L vs. 22.6 U/L, p = 0.002; 34.0 U/L vs. 32.0 U/L vs. 30.5 U/L, p = 0.019, respectively).ConclusionBased on this 1:4 individual-matched case‒control study, the SNP rs56163822 in the NR1H4 gene may be linked to the susceptibility to AT-DILI in Chinese patients receiving anti-TB treatment. Further studies in larger varied populations are needed to validate our findings.

Comorbidities, Tobacco Exposure, and Geography: Added Risk Factors of Heat and Cold Wave Related Mortality among United States Veterans with COPD.

Understanding the health risks associated with extreme weather events is needed to inform policies to protect vulnerable populations. To address this need, we estimated heat and cold wave related mortality risks in a cohort of veteran patients with chronic obstructive pulmonary disease (COPD) and explored disparities among strata of comorbidities, tobacco exposure, and urbanicity. We designed a time stratified case-crossover study among deceased patients with COPD between 2016 to 2021 in the Veterans Health Administration system. Distributed lag models with conditional logistic regression estimated incidence rate ratios (IRR) of heat and cold wave associated mortality risk from lag days 0 to 3 for heatwaves and 0 to 7 for cold waves. Attributable risks (AR) per 100,000 patients were also calculated. Of the 377,545 deceased patients with COPD, the largest heatwave related mortality risk was in patients with COPD and asthma, AR: 14,016 (95% CI: -326, 30,706) across lag days 0 to 3. The largest cold wave related mortality burden was in patients with COPD with no other reported comorbidities, AR: 1,704 (95% CI: 759, 2,686) across lag days 0 to 7. Patients residing in urban settings had the greatest heatwave, AR: 1,062 (95% CI: (576, 1,559), and cold wave AR: 1,261 (95% CI: 440, 2,105) related mortality risk (across lag days 0 to 1 and 0 to 7 respectively). There were no differences in mortality risk by tobacco exposure. Our findings show individuals with COPD are susceptible to heat and cold waves. This information can inform clinical practice and public health policy about the mortality risk vulnerable populations experience with respect to extreme weather conditions. Furthermore, our results may be used in the development and refinement of future extreme weather warning systems designed for public health purposes.

Infectious etiology of intussusception in Indian children less than 2 years old: a matched case-control analysis

BackgroundEnteric infections are hypothesized to be associated with intussusception in children. A small increase in intussusception following rotavirus vaccination has been seen in some settings. We conducted post-marketing surveillance for intussusception following rotavirus vaccine, Rotavac introduction in India and evaluated association of intussusception with enteric pathogens.MethodsIn a case-control study nested within a large sentinel hospital-based surveillance program in India, stool samples from 272 children aged less than 2 years admitted for intussusception and 272 age-, gender- and location-matched controls were evaluated with Taqman array card based molecular assays to detect enteric viruses, bacterial enteropathogens and parasites. Matched case-control analysis with conditional logistic regression evaluated association of enteropathogens with intussusception. Population attributable fractions (PAF) were calculated for enteropathogens significantly associated with intussusception.ResultsThe most prevalent enteropathogens in cases and controls were enteroaggregative Escherichia coli, adenovirus 40/41, adenovirus C serotypes and enteroviruses. Children with intussusception were more likely to harbor adenovirus C serotypes (adjusted odds-ratio (aOR) = 1.74; 95% confidence interval (CI) 1.06–2.87) and enteroviruses (aOR = 1.77; 95% CI 1.05–2.97) than controls. Rotavirus was not associated with increased intussusception risk. Adenovirus C (PAF = 16.9%; 95% CI 4.7% − 27.6%) and enteroviruses (PAF = 14.7%; 95% CI 4.2% − 24.1%) had the highest population attributable fraction for intussusception.ConclusionAdenovirus C serotypes and enteroviruses were significantly associated with intussusception in Indian children. Rotavirus was not associated with risk of intussusception.

The nexus between maternal antenatal care attendance, newborn postnatal care and neonatal mortality in India: a matched case-control study

IntroductionOur study examines the relationship between newborn postnatal care and neonatal mortality stratified by maternal antenatal care attendance under a matched case-control framework.MethodsData from the fifth round of the National Family Health Survey was used. A total of 172,079 recent births to eligible women (15–49 years) in five years preceding the survey were included in the study. We used the conditional logistic regression model, a commonly used regression model to fit matched case-control data to examine the effects of newborn postnatal care on neonatal mortality. The mother’s age at birth of the newborn, previous birth intervals, birth order of the newborn, and birthsize of the newborn were included as the matching variables.ResultsNewborns receiving postnatal care within two days or more than two days of birth are less likely to die during the neonatal period. Preferences for newborn postnatal care were also observed to increase with more maternal antenatal care visits. Our study also found a lower risk of neonatal mortality among those newborns whose umbilical cord was examined within two days of birth, regardless of the number of maternal antenatal care visits. Similarly, the risk of newborn deaths was lower among babies whose body temperature was measured within two days of birth. The tendency to breastfeed their newborns within an hour after delivery was considerably higher among those births that occurred to mothers who had a higher number of maternal antenatal care visits. The risk of newborn deaths was also observed to be lower among those born in public or private healthcare facilities.ConclusionConsidering the cohesive nature of the relationship between neonatal mortality and maternal and child healthcare utilisation, strategic planning and management of the existing policies and programmes related to accessibility, availability, and affordability of maternal and child healthcare services is needed to achieve goal 3.2 of the Sustainable Development Goals. Promoting cost-effective measures such as continuous monitoring of the baby’s body temperature and umbilical cord care could also effectively help reduce neonatal mortality.

Environmental triggers of pemphigus vulgaris and bullous pemphigoid: a case control study.

Previous case-control studies have suggested that environmental factors including exposure to pesticides and organic materials, diet and medications have an important role in the pathogenesis of pemphigus vulgaris. These studies lacked geographical population controls and had less than three controls per case. To identify environmental and occupational risk factors associated with the development of pemphigus vulgaris (PV) and bullous pemphigoid (BP). Cases were patients with PV (n = 25) and BP (n = 29) recruited from 2009 to 2017. Controls for PV (n = 72) and BP (n = 84) were recruited from the general population via electoral commission matching, matched for age, sex, residential location, and ethnicity. Data about demographics, environmental exposures and occupational exposures, was collected using a structured questionnaire. Conditional logistic regression analysis was undertaken using SPSS software to identify significant variables. Significant factors associated with PV included the daily consumption of leeks (odds ratio (OR) 3.6; p = 0.025), mustard oil (OR = 4.4; p = 0.049), tomatoes (OR = 4.735; p = 0.032), multivitamins (OR 3.6; p = 0.009), alcohol (0.039), and calcium supplements (OR = 44, p < 0.001). Other associated factors included the number of lifetime sunburns (p = 0.019), high levels of mental stress (p < 0.001), and the use of lime household cleaning products (p < 0.001), Significant factors associated with BP included the daily consumption of green or herbal tea (OR = 3.7; p = 0.004), fish oil (OR = 5.7; p < 0.001), calcium supplements (OR = 6.1; p < 0.001), multivitamins (OR = 2.6; p = 0.043), and glucosamine (OR = 3.0; p = 0.046). The use of lime household cleaning products (p < 0.001) and high levels of mental stress (p = 0.007) were also associated with BP. Dietary factors containing thiol groups such as leeks, tomatoes, and mustard oil may be potential triggers for PV. High levels of mental stress, the use of supplementary medications such as calcium and multivitamins, and chemical cleaning products containing lime may be associated with an increased risk of developing both PV and BP. Lifestyle changes should be part of routine management for these patients.

Drivers of nest site selection and breeding success in an Alpine ground-nesting songbird

AbstractBirds breeding in high-Alpine habitats must select a suitable breeding site and achieve successful reproduction within a restricted time. During four breeding seasons, we monitored nest sites of the Northern Wheatear (Oenanthe oenanthe), a high-Alpine long-distance migrant. We investigated how ecological factors predicted the selection of a site for nesting within the home range, using conditional logistic regression. Birds preferred south-exposed productive pastures on gentle slopes, interspersed with non-vegetated ground and human-made rockpiles. The direct vicinity of conspecific nests was avoided, as were shrubby or north-exposed areas. We investigated if habitat also influenced breeding success. We analysed the impact of environmental factors on breeding success, which was primarily driven by predation. The probability of the brood fledging successfully decreased on north-exposed slopes or on areas with low coverage of non-vegetated ground. The vicinity of conspecific nests did not have a clear effect. Further, we describe how breeding success varied within and between years. Within years, replacement broods had a higher breeding success. The apparent absence of variation in breeding success between years and a delay of the breeding period in the year with late spring onset suggest a high level of tolerance with respect to inter-annual variation of meteorological conditions. Since the preferred habitat is still widely available in the Alps and given the negative population trends in Western Europe, the Alpine range might serve as a refuge for the Northern Wheatear, as long as low-intensity management and heterogenous habitats are maintained.

Second Trimester Screening Markers of Fetal Chromosomal Abnormalities Other than Common Trisomies: A Case-Control Study

Background: To enhance the efficacy of maternal serum screening (MSS), we conducted an analysis to examine the correlation between certain factors identified during second-trimester screening (STS) and fetal chromosomal abnormalities, excluding the common trisomies (trisomies 13, 18, and 21). Additionally, specific risk factor ranges were established for each category. Methods: A retrospective 1:3 matched case-control study was conducted. Case data were obtained from 311 STS samples of fetal chromosomal abnormalities other than common trisomies, with testing performed in the Prenatal Diagnosis Center of the Maternal and Child Health Care Hospital of Sichuan Province in China between 6 January 2013 and 12 April 2023. A total of 933 controls were matched accordingly. Univariate and multivariable conditional logistic regression analyses were implemented and sensitivity analysis was performed. Results: Multivariable logistic analyses revealed that the independent risk factors for fetal chromosomal abnormalities other than common trisomies were ultrasonographic structural abnormalities (odds ratio (OR) = 3.038; 95% confidence interval (CI), 1.774–5.202; p &lt; 0.001); free β-human chorionic gonadotropin (free β-hCG) as multiples of the median (MoMs) of ≤0.34 (OR = 3.006; 95% CI, 1.803–5.013; p &lt; 0.001), 2.82–3.53 (OR = 1.884; 95% CI, 1.321–2.688; p &lt; 0.001), 3.54–4.67 (OR = 1.949; 95% CI, 1.300–2.923, p = 0.001), and ≥4.68 (OR = 1.730; 95% CI, 1.045–2.866; p = 0.033); and a trisomy 21 (T21) risk of 1/271–1/1000 (OR = 2.434; 95% CI, 1.706–3.472; p &lt; 0.001), 1/101–1/270 (OR = 3.330; 95% CI, 2.300–4.821; p &lt; 0.001), and ≥1/100 (OR = 3.441; 95% CI, 2.178–5.438; p &lt; 0.001). Conclusions: Ultrasonographic structural abnormalities, free β-hCG MoMs, and T21 risk were identified as independent risk factors for fetal chromosomal abnormalities (with the exception of common trisomies) in STS. Our findings thus provide data to support clinical decision-making.

The role of prescribed controlled substance acquisition as potential triggers of opioid overdose: A case-crossover study

Background: The role of prescribed opioids and benzodiazepines as risk factors for opioid overdose are well established, however, their role as potential ‘triggers’ of opioid overdose has not been formally investigated. Objective: The objective of this study was to evaluate the temporal relationship between controlled substance acquisition and opioid overdose utilizing a case-crossover design. Methods: This study utilized Arkansas statewide data between 2014 and 2020. Prescription Drug Monitoring Program (PDMP) data were used to assess controlled substance acquisition and fatal and non-fatal opioid overdose were assessed using linked death certificate, inpatient discharge, and emergency department (ED) data. All persons residing in Arkansas who experienced an opioid overdose or had ≥ 1 Arkansas PDMP prescription fill(s) were included. Controlled substance characteristics were described in the 7 days prior to overdose and compared to the controlled substance characteristics in 11 weekly (7-day) control windows prior to overdose. Binary controlled substance variables indicating presence or absence of: any controlled substance, opioid, benzodiazepine, stimulant, sedative, carisoprodol, opioid and benzodiazepine, and opioid and benzodiazepine and carisoprodol were created. Additionally, total morphine milliequivalents were calculated for each time window. Conditional logistic regression models were estimated and adjusted odds ratios for each controlled substance characteristic after accounting for other controlled substance, and prior overdose, and clinical characteristics derived from ED and inpatient data are reported. Results: A total of 2,818,135 individuals with ≥1 Arkansas PDMP record(s) (45.10 % male; 39.94 mean age) were included, of which 28,670 (1.02 %) experienced ≥1 opioid overdose. There was a significant association between opioid overdose and the acquisition of a controlled substance (OR=1.785; p < 0.001), opioid (OR=1.992; p < 0.001), benzodiazepine (OR=1.379; p < 0.001), carisoprodol (OR=1.744; p < 0.001), opioid and benzodiazepine (OR=2.203; p < 0.001), and opioid and benzodiazepine and carisoprodol (OR=2.503; p < 0.001), in the 7 days prior to an opioid overdose event. Conclusion: Controlled substance prescription acquisition, particularly opioids in combination with carisoprodol and/or benzodiazepines, are potential triggers of opioid overdose.

Use of proton pump inhibitors and risk of severe COVID-19: A case-control study in United States Medicare beneficiaries.

Concerns have been raised regarding proton pump inhibitor (PPI) use and risk of severe coronavirus disease 2019 (COVID-19). Observational studies have yielded heterogeneous results and were subject to important methodological limitations. To examine the association between the receipt of PPIs and risk of COVID-19 hospitalizations and severe in-hospital outcomes or death. Case-control study among Medicare fee-for-service beneficiaries 66+ years old with gastroesophageal reflux disorder (GERD). Within this population, we identified cases by an incident hospital discharge diagnosis of COVID-19 from April 1 to December 11, 2020, using the International Classification of Diseases, Tenth Revision, Clinical Modification (ICD-10-CM) U07.1, and randomly selected up to 10 controls per case, matched on date and neighborhood. We defined PPI use as a prescription providing ≥15 days of supply in the 30 days before admission, with H2-receptor antagonist (H2RA) use as the reference to account for indication. We analyzed uncomplicated hospitalizations and hospitalizations with severe outcomes (intensive/coronary care unit admission, invasive mechanical ventilation, or death), estimating odds ratios (ORs), and 95% confidence intervals (CIs) with multinomial conditional logistic regression adjusted for demographics, comorbidities, chronic medications, and health care utilization. We matched 25,867 uncomplicated and 12,954 severe hospitalized COVID-19 cases to 146,972 and 73,104 controls, respectively. Cases tended to be older and have more comorbidities. Relative to H2RA use, we found no association of PPI use with uncomplicated COVID-19 hospitalization (OR 0.99, 95% CI 0.93-1.06) or severe COVID-19 hospitalization (OR 1.00, 95% CI 0.91-1.10). Relative to H2RA use, PPI use was not associated with uncomplicated or severe COVID-19 hospitalizations among Medicare beneficiaries with GERD.

Weather conditions and legionellosis: a nationwide case-crossover study among Medicare recipients.

Legionellosis is a respiratory infection caused by Legionella sp. that is found in water and soil. Infection may cause pneumonia (Legionnaires' Disease) and a milder form (Pontiac Fever). Legionella colonizes water systems and results in exposure by inhalation of aerosolized bacteria. The incubation period ranges from 2 to 14 days. Precipitation and humidity may be associated with increased risk. We used Medicare records from 1999 to 2020 to identify hospitalizations for legionellosis. Precipitation, temperature, and relative humidity were obtained from the PRISM Climate Group for the zip code of residence. We used a time-stratified bi-directional case-crossover design with lags of 20 days. Data were analyzed using conditional logistic regression and distributed lag non-linear models. A total of 37883 hospitalizations were identified. Precipitation and relative humidity at lags 8 through 13 days were associated with an increased risk of legionellosis. The strongest association was precipitation at day 10 lag (OR = 1.08, 95% CI = 1.05-1.11 per 1 cm). Over 20 days, 3 cm of precipitation increased the odds of legionellosis over four times. The association was strongest in the Northeast and Midwest and during summer and fall. Precipitation and humidity were associated with hospitalization among Medicare recipients for legionellosis at lags consistent with the incubation period for infection.