Effect of religious service attendance on mortality and hospitalisations among Danish men and women: longitudinal findings from REGLINK-SHAREDK.

Research suggests a protective effect of religious service attendance on various health outcomes. However, most research has been done in religious societies, raising the question of whether these associations are also prominent in secular cultures. Here we examine mortality and hospitalisations by religious service attendance among men and women in a secular society. We performed a cohort study including 2987 Danes aged 40+ interviewed in SHARE from 2004 to 2007 and followed up in the Danish registries until 2018. We used Cox regressions and negative binomial regressions to examine associations, including interactions with sex and adjusting for age, wave, socioeconomic factors, lifestyle factors, body mass index, and history of diseases. Overall, 5.0% of men and 6.6% of women reported that they had taken part in a religious organisation within the last month. Among 848 deaths, we found lower mortality for people who attended religious services (hazard ratio (HR) 0.70; 95% CI 0.50-0.99). There was evidence for an association among women (HR 0.56; 95% CI 0.35-0.89), but not among men (HR 0.95; 95% CI 0.59-1.53). In contrast, regarding hospital admissions (n = 12,010), we found lower hospitalisation rates among men who attended religious services (incidence rate ratio (IRR) 0.67; 95% CI 0.45-0.98), whereas no association was found among women (IRR 0.95; 95% CI 0.70-1.29). Sensitivity analyses with E-values were moderately robust. Our results contribute to the limited literature on possible health benefits of religious service attendance in secular societies, demonstrating lower mortality among women and fewer hospitalisations among men.