A study published by researchers at Yeshiva University and its medical school, Albert Einstein College of Medicine, strongly suggests that regular attendance at religious services reduces the risk of death by approximately 20 percent.
The findings, published in Psychology and Health, were based on data drawn from participants who spanned numerous religious denominations. The research was conducted by Eliezer Schnall, Ph.D., clinical assistant professor of psychology at Yeshiva College of Yeshiva University, and co-authored by Sylvia Wassertheil-Smoller, Ph.D., professor of epidemiology and population health at Einstein, as an ancillary study of the Women's Health Initiative (WHI). The WHI is a national, long-term study aimed at addressing women's health issues and funded by the National Institutes of Health.
The researchers evaluated the religious practices of 92,395 post-menopausal women participating in the WHI. They examined the prospective association of religious affiliation, religious service attendance, and strength and comfort derived from religion with subsequent cardiovascular events and overall rates of mortality. Although the study showed as much as a 20 percent decrease in the overall risk of mortality for those attending religious services, it did not show any consistent change in rates of morbidity and death specifically related to cardiovascular disease, with no explanation readily evident.
The study adjusted for participation of individuals within communal organizations and group activities that promote a strong social life and enjoyable routines, behaviors known to lead to overall wellness. However, even after controlling for such behavior and other health-related factors, the improvements in morbidity and mortality rates exceeded expectations.
"Interestingly, the protection against mortality provided by religion cannot be entirely explained by expected factors that include enhanced social support of friends or family, lifestyle choices and reduced smoking and alcohol consumption," said Dr. Schnall, who was lead author of the study. "There is something here that we don't quite understand. It is always possible that some unknown or unmeasured factors confounded these results," he added.
During WHI enrollment, study participants, aged 50 to79, were recruited on a voluntary basis from a variety of sources, from all over the nation. The women answered questions about baseline health conditions and religiosity and were followed by WHI researchers for an average of 7.7 years, with potential study outcomes of cardiovascular events and mortality adjudicated by trained physicians.
To evaluate the impact of religiosity on mortality and morbidity, the investigators looked at variables including self-report of religious affiliation, frequency of religious service attendance, and religious strength as well as comfort, in relation to coronary heart disease (CHD) and death. It is important to note that the study did not attempt to measure spirituality; rather, it examined self-report religiosity measures (irrespective of the participant's religion). Participants answered three key questions at registration, regarding: