The Association between Allostatic Load and Mortality among Chinese Older Adults: The Chinese Longitudinal Health and Longevity Study

Abstract

Background Allostatic load, as multiple biomarker measures of ‘wear and tear’ on physiological systems, has shown some promise that high burden of AL is associated with increased risk of adverse outcomes, but little attention has been paid to China with largest aging population in the world. This study is to examine the association between allostatic load (AL) and all-cause mortality among Chinese adults aged at least 60 years. Methods Data were from 2,439 participants in the Chinese Longitudinal Healthy Longevity Survey. The final analytic sample consisted of 1,519 participants. Cox models were used to examine the association between AL and mortality among men and women, separately. Analysis were also adjusted for potential confounders including age, ethnicity, education, and marital status, smoking and exercise. Results In the fully adjusted model, males with a medium AL burden (score: 2–4) and high AL burden (score: 5–9) had a 34% and 128% higher hazard of death, respectively, than those with a low AL burden (score: 0–1). We did not find significant difference between females with different levels of AL burden. Discussion Higher AL burden was associated with increased all-cause mortality among Chinese men aged at least 60 years. However, we did not find strong evidence about Allostatic load was associated with specific causes of death over the same follow-up period among women. In conclusion Intervention programs targeting modifiable components of the AL burden may help prolong lifespan for older adults, especially men, in China.