Reference Individuals Research Articles

Bidirectional association between inflammatory bowel disease and type 1 diabetes: a nationwide matched cohort and case-control study

Co-occurrence of inflammatory bowel disease (IBD) and type 1 diabetes (T1D) has been linked to poor clinical outcomes, but evidence on their bidirectional associations remain scarce. This study aims to investigate their bidirectional associations. A nationwide matched cohort and case-control study with IBD patients identified between 1987 and 2017. The cohort study included 20,314 IBD patients (≤28 years; Crohn's disease [CD, n=7277], ulcerative colitis [UC, n=10,112], and IBD-unclassified [IBD-U, n=2925]) and 99,200 individually matched reference individuals, with a follow-up until December 2021. The case-control study enrolled 87,001 IBD patients (no age restriction) and 431,054 matched controls. We estimated adjusted hazard ratio (aHR) of incident T1D in the cohort study with flexible parametric survival model and adjusted odds ratio (aOR) of having a prior T1D in the case-control study with conditional logistic regression model, with 95% confidence intervals (CI). During a median follow-up of 14 years, 116 IBD patients and 353 reference individuals developed T1D. Patients with IBD had a higher hazard of developing T1D (aHR=1.58 [95% CI=1.27-1.95]). The hazard was increased in UC (aHR=2.02 [1.51-2.70]) but not in CD or IBD-U. In the case-control study, a total of 1018 (1.2%) IBD patients and 3496 (0.8%) controls had been previously diagnosed with T1D. IBD patients had higher odds of having prior T1D (aOR=1.36 [1.26-1.46]). Such positive association was observed in all IBD subtypes. The sibling comparison analyses showed similar associations between IBD and T1D (aHR=1.44 [0.97-2.15] and aOR=1.32 [1.18-1.49]). Patients with IBD had a moderately increased hazard of developing T1D and higher odds of having prior T1D. Their bidirectional associations may be partially independent of shared familial factors. European Crohn's and Colitis Organisation, Stiftelsen Professor Nanna Svartz Fond, SSMF (project#: PG-23-0315-H-02), Ruth and Richard Julin Foundation; and FORTE (project#: 2016-00424).

Intronic Variants in the MSH2 (rs2303426 and rs10179950) and PMS2 (rs2286681 and rs62456178) Genes Are Not Associated with Colorectal Cancer in Mexican Patients

Background/Objectives: In the origin and development of colorectal cancer (CRC), a global public health problem, a dysfunction mismatch repair system appears to be a key factor. The objective was to determine the association of intronic variants in the MSH2 and PMS2 genes with CRC in Mexican patients. Methods: Blood samples of 143 CRC patients and 146 reference individuals were genotyped through TaqMan® Genotyping Assays. Genotypic and allelic frequencies were determined by direct counting. To compare genotypic and allelic distributions, the chi-square test was used. For the association analysis, the risks of alleles and genotypes were estimated by odds ratio with 95% confidence intervals. Haplogroups were inferred with a Bayesian algorithm. Linkage disequilibrium was measured using D’ and r2 with Arlequin v3.5.2. The in silico analysis was carried out using the SpliceAI, UCSC, JASPAR and TRRUST platforms. All statistical analyses were performed with SPSS v29.0.2.0. Results: In the CRC group, the mean age was 58.2 ± 14.7 years and 60.8% were men. No variant was associated with CRC or implicated in gene post-replicative processing. Linkage disequilibrium was observed for loci rs2303426 and rs10179950 in MSH2 and for loci rs2286681 and rs62456178 in PMS2. Conclusions: The genotypic and allelic frequencies of the four variants are reported for the first time in Mexican patients with CRC. No association was found between gene variants and risk for CRC but there was a strong linkage disequilibrium between the loci of both MSH2 and PMS2 genes. None of the variants showed a possible repercussion on splicing.

Burden of disease and cost of illness of infants less than 6 months of age hospitalised with respiratory syncytial virus in Denmark – a 10-year national register-based study

BackgroundRespiratory syncytial virus (RSV) is the most common cause of hospitalisation in infants aged ≤ 6 months in Western countries. Nearly 1,500 infants under six months of age are hospitalised with RSV annually in Denmark. This nationwide study describes the healthcare resource utilisation and costs related to RSV hospitalisation in this vulnerable age group.MethodsRSV cases were identified in the Danish National Patient Register. Infants were included if they at the age of 0–5 months had a (1) respiratory related hospital admission (duration > 12 h), (2) within 10 days of a positive RSV test, (3) between January 2013 and December 2022. Each case was matched with five individuals never diagnosed with RSV on age, sex, region of residence, birth (pre/full term), number of siblings < 7 years old, and parents’ education. An episode of RSV was defined as the seven days prior to hospitalisation to 30 days after initial hospitalisation. Study outcomes included contacts with hospital and primary care, and total healthcare costs defined as the sum cost of hospital care, primary care, and prescription medicine. Cost and contacts attributable to RSV was calculated in a diff-in-diff framework, as the difference between case and reference group.ResultsThe study population comprised of 8,428 RSV cases and 41,725 reference individuals. Cases generated 1.58 (p < 0.001) attributable inpatient contacts, 0.84 (p < 0.001) outpatient contacts, and 1.19 (p < 0.001) primary care contacts during their RSV episode. An additional 0.6 (p < 0.001) inpatient, 1.08 (p < 0.001) outpatient and 2.42 (p < 0.001) primary care contacts were attributed to RSV in the year following the RSV episode. Total cost of an RSV episode was EUR 2,997 (p < 0.001) with an additional EUR 1,428 (p < 0.001) in the following year.ConclusionRSV hospitalisations of infants are associated with substantial healthcare utilisation and costs. The same pattern was observed in the year following the RSV episode. If the new RSV prevention options are introduced nationwide, the overall burden of RSV is expected to be substantially reduced in the future.

The risk of cancer in pediatric-onset immune-mediated inflammatory diseases – A nationwide study

Background and objectivesAdult-onset immune-mediated inflammatory disease (IMID) increases the risk of several cancers. However, data on pediatric-onset IMID (pIMID) remains scarce. We estimated the long-term cancer risk in pIMID and the association between medical treatment and specific cancers. MethodsWe used the nationwide Danish health registers to identify pIMID patients diagnosed from Jan 1, 1980 to Dec 31, 2018. Patients were matched with ten reference individuals based on age, sex, and residence. The primary exposure was pIMID, including autoimmune hepatitis, primary sclerosing cholangitis, Crohn's disease, ulcerative colitis, juvenile idiopathic arthritis, systemic lupus erythematosus, vasculitis, and connective tissue disease. Secondary exposures were immunomodulators and tumor necrosis factor-α antagonists (anti-TNFα). The primary outcome was cancer. Estimates are presented as hazard ratios adjusted for family income at diagnosis (AHR). ResultsWe included 12,664 pIMID patients and 109,274 reference individuals. Median follow-up time was 10.6 (interquartile range: 5.4–17.7) years for patients and 10.2 (interquartile range: 5.2–17.3) years for reference individuals. Patients with pIMID had a twofold higher cancer risk (AHR 2.2 [95 % confidence interval (CI): 1.8–2.6]) compared with reference individuals. Thiopurine treatment was associated with a higher risk of lymphoma (AHR 6.1 [95%CI: 2.2–16.8]) and skin cancer (AHR 6.1 [95%CI: 2.4–15.4]). Anti-TNFα treatment was associated with a higher risk of lymphoma (AHR 4.9 [95%CI: 1.1–22.6]). ConclusionsWe found an increased cancer risk in patients with pIMID followed into adulthood. Additionally, thiopurines and anti-TNFα were associated with increased lymphoma and skin cancer risks. This highlights the importance of individualized immunotherapy and cancer surveillance.

Risk of depression in patients with atopic dermatitis: An updated systematic review and meta-analysis of children, adolescent and adult groups.

Atopic dermatitis is a popular allergy disease among children, adolescents and adults. The risk of depression in patients with atopic dermatitis can be evaluated using an updated systemic review and meta-analysis of observational and cross-sectional studies. The log odds ratio (OR) was transformed using the OR and 95% confidence interval (CI) to assess the risk of depression in patients with atopic dermatitis across the children, adolescent and adult groups. After a restricted selection, 39 studies of 234 306 patients with atopic dermatitis and 10 935 459 reference individuals were enrolled. The focused outcome was the OR and 95% CI of depression risk in each included study, assigned according to the age for the children, adolescent and adult groups. In adult patients with atopic dermatitis, a significantly higher risk of depression was observed. In addition, the similar significantly higher risk of depression was observed in children and adolescent patients with atopic dermatitis, respectively. However, the significantly high heterogeneity was observed across children, adolescent and adult groups. In the current meta-analysis, the patients with atopic dermatitis had a higher risk of depression across the children, adolescent and adult groups, respectively. However, substantial heterogeneity should be considered during the interpretation of our meta-analysis results.

Calcium kinetic rates in Caucasian males and females from birth to adulthood

Calcium plays an important role in bone physiology and its kinetics change over lifetime. The analysis of calcium deposition and release through stable isotope techniques has guided recommendations on nutritional uptake for overall health. In addition, calcium kinetics have great relevance for toxicokinetic studies of bone-seeking elements (e.g, aluminium and lead) since these elements use common uptake and release pathways. While the impact of many factors on calcium kinetics have been investigated individually, a consolidated age- and sex-dependent kinetic description amenable for toxicokinetic modeling, however, is still lacking. Motivated by this need, we systematically reviewed the existing literature on calcium kinetics and assembled a large and consistent dataset. Then, building on the work of O'Flaherty in the 1990s, we formulated age- and sex-dependent functions describing calcium deposition, release, net retention, and mass. This description represents the current knowledge on calcium kinetics in a reference individual of Caucasians as most data was from this population.

Reference Intervals Revisited: A Novel Model for Population-Based Reference Intervals, Using a Small Sample Size and Biological Variation Data.

Conventional population-based reference intervals (popRIs) are established on the ranking of single measurement results from at least 120 reference individuals. In this study, we aimed to explore a new model for popRIs, utilizing biological variation (BV) data to define the reference interval (RI) limits and compared BV-based popRI from different sample sizes with previously published conventional popRIs from the same population. The model is based on defining the population set point (PSP) from single-measurement results of a group of reference individuals and using the total variation around the PSP, derived from the combination of BV and analytical variation, to define the RI limits. Using data from 143 reference individuals for 48 clinical chemistry and hematology measurands, BV-based popRIs were calculated for different sample sizes (n = 16, n = 30, and n = 120) and considered acceptable if they covered 90% of the population. In addition, simulation studies were performed to estimate the minimum number of required reference individuals. The median ratio of the BV-based to conventional RI ranges was 0.98. The BV-based popRIs calculated from the different samples were similar, and most met the coverage criterion. For 25 measurands ≤16 reference individuals and for 23 measurands >16 reference individuals were required to estimate the PSP. The BV-based popRI model delivered robust RIs for most of the included measurands. This new model requires a smaller group of reference individuals than the conventional popRI model and can be implemented if reliable BV data are available.

Diverticular disease and risk of incident major adverse cardiovascular events: A nationwide matched cohort study.

An increased risk of cardiovascular disease (CVD) has been reported in patients with diverticular disease (DD). However, there are knowledge gaps about specific risks of each major adverse cardiovascular event (MACE) component. This nationwide cohort study included Swedish adults with DD (1987-2017, N=52,468) without previous CVD. DD was defined through ICD codes in the National Patient Register and colorectal histopathology reports from the ESPRESSO study. DD cases were matched by age, sex, calendar year and county of residence to ≤5 population reference individuals (N=194,525). Multivariable-adjusted hazard ratios (aHRs) for MACE up until December 2021 were calculated using stratified Cox proportional hazard models. Median age at DD diagnosis was 62 years and 61% were females. During a median follow-up of 8.6 years, 16,147 incident MACE occurred in individuals with DD, and 48,134 in reference individuals (incidence rates (IRs)=61.4 vs. 43.8/1,000 person-years) corresponding to an aHR of 1.24 (95%CI=1.22-1.27), equivalent to one extra case of MACE for every 6 DD patients followed for 10 years. The risk was increased for ischemic heart disease (IR=27.9 vs. 18.6; aHR=1.36, 95%CI=1.32-1.40), congestive heart failure (IR=23.2 vs. 15.8; aHR=1.26, 95%CI=1.22-1.31), and stroke (IR=18.0 vs. 13.7; aHR=1.15, 95%CI=1.11-1.19). DD was not associated with cardiovascular mortality (IR=18.9 vs. 15.3; aHR=1.01, 95%CI=0.98-1.05). Results remained robust in sibling-controlled analyses. Patients with DD had a 24% increased risk of MACE compared with reference individuals, but no increased cardiovascular mortality. Future research should confirm these data and examine underlying mechanisms and shared risk factors between DD and CVD.

Thiopurines and the Risk of Cancer in Patients With Inflammatory Bowel Disease and Reference Individuals Without Inflammatory Bowel Disease – A Danish Nationwide Cohort Study (1996-2018)

Thiopurine therapy is a cornerstone in the treatment of inflammatory bowel disease (IBD). We aimed to assess the effect of thiopurines on cancer risk in IBD according to drug exposure and age. Danish national registers were used to identify incident IBD patients, exposure to drugs and status of cancers, in 1996-2018. Cox regressions were used to compare cancer risks in IBD and non-IBD individuals and to assess IBD patients' cumulative drug exposure and the association to first cancer, excluding non-melanoma skin cancer. We followed 43,419 IBD patients for a median of 8.2 years (IQR:3.7-14.2) after IBD diagnosis. Cancer was reported in 3,128 (7.2%) IBD patients. The risk of cancer was increased in IBD patients in all age categories compared to non-IBD individuals (<50 years (aHR: 1.59 (95%CI: 1.43-1.77)), 50-65 years (aHR: 1.31 (95%CI: (1.19-1.44)), and >65 years (aHR: 1.14 (95%CI: 1.05-1.24)). Monotherapy and combination therapy were associated with cancer (aHR:1.36 (95%CI:1.17-1.57) and (aHR:2.49 (95%CI:1.64-3.78), respectively) compared to unexposed IBD patients. Among elderly (>65 years), the aHR was 2.79 (95%CI:1.24-6.28) in those receiving combination therapy. In patients discontinuing thiopurines, aHRs returned to the level of unexposed (aHR:0.89 (95%CI:0.78-1.01)). The aHR was positively associated with cumulative thiopurine exposure and in patients with >5 years of exposure, reaching aHR 1.36 (95%CI:1.15-1.61). Thiopurines were associated with increased hazard of cancer, especially when used in combination therapy in the elderly. The hazard increased by 36% when patients were exposed to thiopurines for more than five years. Reassuringly, the hazard returned to baseline after discontinuation of thiopurines.

When do entrepreneurs and employees consider reversing career choices to manage regrets?

ABSTRACT We examine when employees consider becoming entrepreneurs and vice versa out of career choice regret. We collected data on 724 entrepreneurs and 721 employees and applied PLS-SEM to test a new conceptual model made of simple and double moderating effects. We report that individuals consider reversing career choices to manage regrets when: (1) the foregone career is accessible and resistance to change does not prevail; (2) it is not yet too late to do so; (3) they never tried the forgone option or, mistakenly or strategically, gave up on it; (4) the decision can benefit from genuine social support and approval of referent individuals; and (5) can advance valued active goals. We do not only test the regret regulation theory but also offer new areas in which it might be clarified and extended in line with the post-decision regret management strategies. The policy implications of the findings are discussed.

Psychiatric Disorders Among 5,800 Patients With Microscopic Colitis: A Nationwide Population-Based Matched Cohort Study.

Microscopic colitis (MC) is an inflammatory condition of the large intestine. Primarily diagnosed in middle-aged and older adults, the incidence of the disease has increased markedly during the past few decades. While MC is associated with a reduced quality of life, large-scale studies on the association with future psychiatric disorders are lacking. We conducted a nationwide matched cohort study in Sweden from 2006 to 2021. Through a nationwide histopathology database (the Epidemiology Strengthened by histoPathology Reports in Sweden study), we identified 5,816 patients with a colorectal biopsy consistent with MC. These patients were matched with 21,509 reference individuals from the general population all of whom with no previous record of psychiatric disorders. From 2006 to 2021, 519 patients with MC (median age 64.4 years [interquartile range = 49.5-73.3]) and 1,313 reference individuals were diagnosed with psychiatric disorders (9.9 vs 6.5 events per 1,000 person-years), corresponding to 1 extra case of psychiatric disorder in 29 patients with MC over 10 years. After adjustments, the hazard ratio for psychiatric disorders was 1.57 (95% confidence interval = 1.42-1.74). We found significantly elevated estimates up to 10 years after MC diagnosis and a trend toward higher risk with increasing age. Specifically, we observed increased risks for unipolar depression, anxiety disorders, stress-related disorders, substance abuse, and suicide attempts. In sibling-controlled analysis, the adjusted hazard ratio was 1.76 (95% confidence interval = 1.44-2.15). Patients with MC are at increased risk of incident psychiatric disorders compared with the general population.

High resolution remote sensing for biodiversity assessment and monitoring: A case study of dominant tree species in an old-growth forest

Biodiversity assessment and monitoring in old-growth forests (OGFs) is crucial for their effective management and conservation amongst various natural and human-induced challenges. In the present study, the spatial and temporal species diversity were assessed in the mixed stands of Białowieża Forest (BF), a renowned UNESCO world heritage site recognized as an OGF. The BF has encountered challenges due to pest outbreaks peaking in 2016–2017 with adverse impacts on species composition. Utilizing airborne laser scanning (ALS) and color infrared (CIR) datasets from 2015 and 2019 (prior and following the peak, respectively), 30 variables were extracted and employed as input for the Random Forest algorithm to identify 14 species of broadleaved and coniferous individuals at plot levels (458 plots) within the BF. We calculated biodiversity indices (including α, β, and γ diversity), Importance Value Index (IVI), bivariate scale-dependent density of species, and temporal β diversity indices independently for data acquired from both field observation (FO) and species maps obtained through remote sensing analysis (RSA). The study found no significant differences in α diversity indices between the FO and RSA across the BF, however, notable discrepancies existed in species richness. Limited species detection was attributed to low species frequency and therefore, insufficient reference individuals. Average β and γ diversities from both datasets showed no significant differences. The RSA accurately identified top species and their changes in terms of IVI. Additionally, the RSA explored scale-dependent density changes of broadleaved individuals around conifers. Consistency was observed between FO and RSA in identifying dominance shifts from losses to gains within the BF communities. The comparison of diversity indices obtained from FO and RSA suggests that the RSA provided comparable results to FO in capturing the diversity of dominant tree species within the BF, providing a promising approach for advancing our understanding of forest biodiversity in OGFs.

Eosinophilic esophagitis and risk of incident major adverse cardiovascular events: a nationwide matched cohort study

BackgroundInflammatory diseases have been associated with an increased cardiovascular risk. However, data on incident major adverse cardiovascular events (MACE) from large population-based cohorts of patients with eosinophilic esophagitis (EoE) is lacking.MethodsThis study included all Swedish adults with EoE without a record of previous cardiovascular disease (CVD) (1990–2017, N = 1546) with follow-up until 2019. Individuals with EoE were identified from prospectively recorded histopathology reports from all Swedish pathology departments (n = 28). EoE patients were matched at index date for age, sex, calendar year and county with up to five general population reference individuals (N = 7281) without EoE or CVD. Multivariable-adjusted hazard ratios (aHRs) for MACE (ischemic heart disease, congestive heart failure, stroke and cardiovascular mortality) were calculated using Cox proportional hazards models. Full sibling comparisons and adjustment for cardiovascular medication were performed.ResultsDuring a median follow-up of 6.0 years, we observed 65 incident MACE in patients with EoE (6.4/1000 person-years (PY)) and 225 in reference individuals (4.7/1000 PY). EoE was not associated with a higher risk of MACE (aHR = 1.14, 95% CI = 0.86–1.51) or any of its components. No differences between age, sex and follow-up time were observed. The results remained stable in sensitivity analyses, including when adjusting for relevant cardiovascular medications and a full sibling comparison.ConclusionsIn this large population-based cohort study, patients with EoE had no increased risk of MACE compared to reference individuals and full siblings. The results are reassuring for patients with EoE.

#1271 Risk of primary infections in patients with IgA nephropathy: a Swedish population-based cohort study

Abstract Background and Aims IgA nephropathy (IgAN) is the most common global kidney disease with a highly variable clinical presentation. Diagnosis IgAN requires a biopsy, and the immunohistologic examination is dominated by depositions of aberrant IgA1 antibodies. Since IgA antibodies are mainly produced by the mucosal associated lymphoid tissue the relationship between the mucosal immune system and IgAN has long been considered. The current theories on the origin of the disease involve genetic and environmental factors, with mucosal infections potentially playing a role. In some IgAN patients gastrointestinal and/or upper respiratory infections can aggravate the disease with episodic macrohematuria and/or increased proteinuria. Coincidently, these infections are also more common among patients with selective IgA deficiency. The aim of this study was to investigate whether the presence of IgAN confers an increased risk of infections in general to the IgAN patient. Method IgAN was defined by a computerized biopsy record from 1997 to 2011 in Sweden. Each IgAN patient was matched with up to five reference individuals based on age, sex, calendar year, and county of residence. Exclusions included those with organ transplants, HIV, immunodeficiency, or end-stage kidney disease before study entry, and follow-up data were censored for subsequent occurrences. Linear and Cox regressions, adjusted for age, sex, and education, were performed to analyze total infections and antimicrobial treatments in both patient and reference groups. Sibling analyses were also performed, adjusted for baseline age, sex and educational attainment. Results The linear regression analysis revealed a significant association between IgA nephropathy (IgAN) and the overall frequency of infections compared to the general population (β = 0.45; 95% CI: 0.37–0.54), women (β = 0.35; 95% CI: 0.19–0.50), men (β = 0.50; 95% CI: 0.40–0.60), and siblings (β = 0.37; 95% CI: 0.25–0.49) for women (β = 0.24; 95% CI: 0.06–0.41) and men (β = 0.43; 95% CI: 0.27–0.60). Similarly, a significant association was found for the frequency of prescribed antimicrobial agents compared to the general population (β = 0.66; 95% CI: 0.51–0.82), women (β = 0.92; 95% CI: 0.56–1.27), men (β = 0.55; 95% CI: 0.39–0.71), with similar estimates in the sibling analyses. The subtypes with the strongest association were urinary tract infections (β = 0.09; 95% CI: 0.07–0.11), ENT (ear, nose, and throat) infections (β = 0.08; 95% CI: 0.04–0.12), muscular infections (β = 0.08; 95% CI: 0.05–0.12), and infections in the GI (gastrointestinal) tract (β = 0.06; 95% CI: 0.04–0.09). Infections in the lower respiratory tract, skin and mycoses also had a significant positive association, however, no associations to infections in the central nervous system or infections caused by helminths and protozoans were identified. Cox regression showed an elevated risk of any infection with an adjusted hazard ratio (HR) of 2.05 (95% CI: 1.88–2.23), especially for sepsis (aHR = 3.13; 95% CI: 2.14–4.59), and time to the first prescription of antimicrobials with an aHR of 1.37 (95% CI: 1.30–1.45). Linear regression of prescribed antimicrobial treatments showed an overall β = 0.67; 95% CI: 0.51–0.82, and specifically for antibiotics (β = 0.64; 95% CI: 0.49–0.78). Conclusion Our study demonstrates an increased prevalence of infections and antibiotic prescriptions in IgAN patients compared to the general population and their siblings. Further studies on the potential impact of IgAN and its immunological aberrations on overall infection susceptibility is warranted.

Risk of heart failure in inflammatory bowel disease: a Swedish population-based study.

Dysregulation of inflammatory and immune responses has been implicated in the pathogenesis of heart failure (HF). But even if inflammation is a prerequisite for inflammatory bowel disease (IBD), little is known about HF risk in IBD. In this Swedish nationwide cohort, patients with biopsy-confirmed IBD were identified between 1969 and 2017 [n = 81 749, Crohn's disease (CD, n = 24 303), ulcerative colitis (UC, n = 45 709), and IBD-unclassified (IBD-U, n = 11 737)]. Each patient was matched with up to five general population reference individuals (n = 382 190) and IBD-free full siblings (n = 95 239) and followed until 31 December 2019. Flexible parametric survival models estimated the adjusted hazard ratio (aHR) and standardized cumulative incidence for HF, with 95% confidence intervals (CI). There were 5582 incident HF identified in IBD patients (incidence rate [IR]: 50.3/10 000 person-years) and 20 343 in reference individuals (IR: 37.9) during a median follow-up of 12.4 years. IBD patients had a higher risk of HF than reference individuals (aHR 1.19, 95% CI 1.15-1.23). This increased risk remained significant ≥20 years after IBD diagnosis, leading to one extra HF case per 130 IBD patients until then. The increased risk was also observed across IBD subtypes: CD (IR: 46.9 vs. 34.4; aHR 1.28 [1.20-1.36]), UC (IR: 50.1 vs. 39.7; aHR 1.14 [1.09-1.19]), and IBD-U (IR: 60.9 vs. 39.0; aHR 1.28 [1.16-1.42]). Sibling-controlled analyses showed slightly attenuated association (IBD: aHR 1.10 [1.03-1.19]). Patients with IBD had a moderately higher risk of developing HF for ≥20 years after IBD diagnosis than the general population.

Paediatric-onset immune-mediated inflammatory disease is associated with an increased mortality risk-A nationwide study.

Paediatric-onset immune-mediated inflammatory diseases (pIMID) show more aggressive phenotypes than when diagnosed in adults. However, data on mortality are often extrapolated from adult studies. To estimate the effect of pIMID on mortality. In a population-based cohort study using the nationwide Danish healthcare registers, we included all patients diagnosed with pIMID in Denmark from 1980 to 2018. PIMID were defined as ICD codes indicative of autoimmune hepatitis, primary sclerosing cholangitis, Crohn's disease, ulcerative colitis, juvenile idiopathic arthritis, lupus erythematosus, or vasculitis registered before age 18 years. All-cause mortality was the primary outcome; cause-specific mortality was the secondary outcome. We used Cox survival analysis to estimate hazard ratios (HR), and Aalen survival analysis to estimate rate differences. We included 11,581 individuals diagnosed with pIMID and 99,665 reference individuals, accounting for 1,371,994 person-years of follow-up. Median and interquartile (IQR) age at diagnosis was 12.6 (7.9-15.9) years. During follow-up, 152 patients with pIMID and 316 reference individuals died; adjusted HR (aHR) was 3.8 (95% confidence interval [CI] 3.1-4.7). This corresponded to 6.9 (95% CI: 5.3-8.5) additional deaths per 10,000 person-years. The strongest associations were found for gastrointestinal diseases (aHR 22.8; 95% CI 9.6-64.1), gastrointestinal cancers (aHR 19.2; 95% CI 5.0-74.2) and lymphoproliferative disorders (aHR 6.8; 95% CI 2.8-16.8). Patients diagnosed with pIMID have a fourfold higher risk of mortality when followed into early adulthood compared with reference individuals. This underlines the severe disease course of pIMID and highlights the need for multidisciplinary care.

Association of celiac disease with eosinophilic esophagitis: Nationwide register-based cohort study with sibling analyses

Celiac disease (CeD) is associated with several immune-mediated disorders, but it is unclear whether it is associated with eosinophilic esophagitis (EoE). We sought to examine the risk of EoE in patients with biopsy-verified CeD compared with matched controls and siblings. Using nationwide population-based histopathology data, we identified 27,338 patients with CeD diagnosed in the period 2002 to 2017 in Sweden. Patients with CeD were age- and sex-matched with up to 5 reference individuals (n= 134,987) from the general population. Cox Regression was used to estimate hazard ratios (HRs) for developing biopsy-verified EoE. In a secondary analysis, we used unaffected siblings of patients with CeD as comparators to adjust for intrafamilial confounding. The median age at CeD diagnosis was 27 years, and 63.3% were female patients. During a median follow-up of 8.1 years, 17 patients with CeD and 13 matched reference individuals were diagnosed with EoE. This corresponded to incidence rates of 0.08 versus 0.01 per 1000 person-years, respectively, and an adjusted HR for EoE of 6.65 (95% CI, 3.26-13.81). Compared with their siblings without CeD, patients with CeD were however at a no increased risk of EoE (HR, 1.39; 95% CI, 0.55-3.51). In this study, individuals with CeD were at a 6.6-fold increased risk of later EoE compared with the general population. This association might be explained by an altered health-seeking behavior or through shared genetic or early environmental factors because the excess risk disappeared in sibling analyses.

Establishment of reference intervals for plasma IL-2, IL-4, IL-5, and IL-17A in healthy adults from the Jiangsu region of eastern China using flow cytometry: A single-center study

BackgroundCytokines are of utmost importance in both the physiological and pathological immune responses of the human body. This study utilized flow cytometry to measure the levels of plasma interleukin-2 (IL-2), interleukin-4 (IL-4), interleukin-5 (IL-5) and interleukin-17A (IL-17A) and established their reference intervals, aiming to provide data support for the diagnosis and treatment of clinical diseases. MethodsAccording to the inclusion and exclusion criteria, a total of 728 reference individuals were included in this study from January 2023 to June 2023. The Kolmogorov–Smirnov test was used to analyse the distributions of plasma IL-2, IL-4, IL-5 and IL-17A. The reference intervals of plasma IL-2, IL-4, IL-5 and IL-17A were established by the unilateral percentile method (95th percentile) based on the guidelines of C28-A 3 and WS/T 402–2012. ResultsIn this study, the levels of plasma IL-2, IL-4, IL-5 and IL-17A were nonnormally distributed. The concentrations of plasma IL-2, IL-4, IL-5 and IL-17A in healthy adults were not significantly different by sex or age (all P > 0.05). Therefore, all the reference individuals were combined into one group, and the reference intervals of plasma IL-2, IL-4, IL-5 and IL-17 were established by flow cytometry (IL-2 ≤ 10.25 pg/mL, IL-4 ≤ 9.87 pg/mL, IL-5 ≤ 3.36 pg/mL and IL-17A ≤ 9.46 pg/mL). ConclusionsWe first established the reference intervals of plasma IL-2, IL-4, IL-5 and IL-17A in healthy adults based on a single-center population in the Jiangsu region in eastern China, which will provide an important reference value for evaluating human immune status and the diagnosis and treatment of clinical diseases.

Verification of bile acid determination method and establishing reference intervals for biochemical and haematological parameters in third-trimester pregnant women.

The aims of this study were to verify the bile acids (BA) method and to establish reference intervals (RIs) for bile acids (BA) and biochemical and haematological parameters in Croatian pregnant women. BA spectrophotometric method verification was performed on Siemens Atellica Solution CH 930 automated analyser using Sentinel reagent. Stability, precision, trueness, linearity, and RIs, as well as lipemia interference were tested according to CLSI guidelines. BA, biochemical, and haematological parameters were measured in serum (BA, biochemical) and whole blood (haematological) samples of fasting healthy third-trimester pregnant women from Croatia (n=121). The establishment of the RIs was done a priori according to the CLSI EP28-A3C:2010 guideline. Selected reference individuals' data were analysed using parametric, non-parametric, and robust methods. Stability study showed that BA are stable in serum samples for 2days at 20 °C, 14days at 4-8 °C, and 22days at-20 °C. The precision study and adult RIs verification met the criteria. Linearity was verified for the concentration range of 3.5-172.1 μmol/L whereas the lipemia interference test showed a positive bias (%) in BA concentration. The determined reference limits generally exhibited better precision for haematological parameters, being lower than the upper recommended value 0.2, unlike biochemical parameters. Haematological parameters showed notable differences between pregnant and non-pregnant women, while many biochemical parameters' RIs remained similar. Only ALT and GGT showed lower non-comparable RI upper limits in the population pregnant women. Spectrophotometric BA method showed satisfactory performance and all examined parameters were within the set criteria. Moreover, RIs for key biochemical and haematological parameters, including BAs, have been established for the first time in the population of Croatian pregnant women.

Spondyloarthritis in First-Degree Relatives and Spouses of Patients with Inflammatory Bowel Disease: A Nationwide Population-based Cohort Study from Sweden.

Register-based research suggests a shared pathophysiology between inflammatory bowel disease [IBD] and spondyloarthritis [SpA], but the role of familial [genetic and environmental] factors in this shared susceptibility is largely unknown. We aimed to compare the risk of SpA in first-degree relatives [FDRs] and spouses of IBD patients with FDRs and spouses of matched, population-based, reference individuals. We identified 147 080 FDRs and 25 945 spouses of patients with incident IBD [N = 39 203] during 2006-2016, and 1 453 429 FDRs and 258 098 spouses of matched reference individuals [N = 390 490], by linking nationwide Swedish registers and gastrointestinal biopsy data. Study participants were followed 1987-2017. Cox regression was used to estimate hazard ratios [HRs] of SpA. During follow-up, 2430 FDRs of IBD patients [6.5/10 000 person-years] and 17 761 FDRs of reference individuals [4.8/10 000 person-years] were diagnosed with SpA, corresponding to an HR of 1.35 [95% CI:1.29, 1.41]. In subgroup analyses, the increased risk of SpA was most pronounced in FDRs of Crohn's disease patients [HR = 1.44; 95% CI:1.34,1.5 6] and of IBD patients aged <18 years at diagnosis [HR = 1.46; 95% CI: 1.27, 1.68]. IBD patients' spouses also had a higher SpA rate than reference individuals' spouses, but the difference was less pronounced [4.3 vs 3.5/10 000 person-years; HR = 1.22; 95% CI:1.09, 1.37]. No subgroup-specific risk pattern was identified among spouses. The observed shared familial risks between IBD and SpA support shared genetic factors in their pathogenesis. However, spouses of IBD patients were also at increased risk for SpA, reflecting the influence of environmental exposures or similarities in health-seeking patterns.