Medicine
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Self-perceived health is related to outcomes such as morbidity and mortality. However, little is known about the relationship between pain severity and self-perceived health, which could be useful to know to help improve health. This study assessed the association of pain severity and other contributing factors with self-perceived health among United States adults. ⋯ In adjusted analyses, there were significant associations between fair or poor self-perceived health and any level of pain severity versus no pain, age 40 to 64 versus 18 to 39 years, male versus female, Hispanic versus non-Hispanic, high school diploma or less versus more than high school, unemployed versus employed, poor, near poor, or low versus middle or high income, fair or poor versus excellent, very good, or good mental health, exercising <5 times versus ≥5 times per week, smoker versus nonsmoker, and ≥2 versus <2 comorbid conditions. This study found that greater levels of pain severity (and several other variables) were associated with greater odds of reporting fair or poor self-perceived health. These associations provide greater insight into the variables associated with self-perceived health, which may be useful targets to improve health.
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The influence of circulating white blood cells and inflammatory factors on pruritus is gradually recognized by the public, but the specific causal relationship is still unknown. In this study, we included inflammatory cytokine profiles from 8293 healthy subjects, genetic data on blood cells from various ethnic and ancestry backgrounds, including 746,667 individuals, and 1370 patients of European descent with pruritus for a bidirectional 2-sample Mendelian randomization (MR) analysis. We employed several robust statistical methods, including the inverse variance weighted, weighted median, and the MR-Egger method. ⋯ The reverse MR analysis demonstrated the absence of reverse causality. Our research delineates the causal links between eosinophil cell count, stromal-cell-derived factor 1 alpha, monokine induced by gamma interferon, cutaneous T-cell-attracting chemokine levels, and pruritus susceptibility. These insights may present promising avenues for enhancing the management and therapeutic strategies for patients suffering from pruritus.
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The gut microbiota (GM) may be associated with uveitis. However, the causal relationship between the GM and uveitis and whether blood metabolites act as mediators of the GM remain unclear. We extracted the GM, blood metabolites, and uveitis data from genome-wide association study (GWAS) summary data. ⋯ Finally, there was a causal association between 3 GM taxa and 6 blood metabolites, with 6 positive and 2 negative effects. N-methylproline possessed the greatest mediated effect (9.41%) between Ruminococcaceae UCG010 and uveitis. These results provide new insights into the pathogenesis of uveitis and offer a new approach to uveitis prevention and treatment from GM and blood metabolites perspective.
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Observational studies and meta-analyses have indicated a notable correlation between obesity and vitamin D deficiency, yet the causal relationship between the 2 remains contentious. This study employed a bidirectional Mendelian randomization (MR) analysis to explore the interrelation between obesity-associated body metrics: specifically body mass index (BMI), waist-to-hip ratio (WHR), body fat percentage (BFP), whole-body fat percentage (WHF), and 25-hydroxyvitamin D (25(OH)D) levels. Instrumental variables for BMI, WHR, BFP, whole body fat mass (WFM), and 25(OH)D were carefully selected based on predefined thresholds. ⋯ However, no statistically significant inverse causative association was observed between these body components and 25(OH)D levels. Sensitivity analyses revealed no substantial heterogeneity or pleiotropy, ensuring robustness of the findings. This study substantiates a significant causal link between 4 obesity-related body components and decreased 25(OH)D levels, excluding reverse causality.
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Observational studies indicate that the risk of prostatitis in sleep apnea patients is higher than those without sleep apnea. However, the causal relationships remain to be determined. This study aims to investigate the causal relationships of sleep apnea on prostatitis using Mendelian randomization (MR). ⋯ The inverse variance weighted (IVW) analysis was employed as the primary statistical method. In 2-sample MR analyses, we found that IVW estimates revealed that sleep apnea inferred an effect on risk of prostatitis at statistical significance (odds ratio [OR] = 1.370, 95% confidence interval [CI] = 0.094-0.535, P = .005). This MR study strengthens the evidence of a causal relationship between sleep apnea and prostatitis in Europeans.