Younger Older Americans and Sarcopenic Obesity: The Moderating Role of Living Alone

Abstract Objectives Previous studies have indicated that compared to older adults, younger older adults (e.g., baby boomers) are more susceptible to obesity, but their risk decreases as they age. However, there is a lack of research on how individuals experience sarcopenic obesity, which increases in later life and is a mortality risk factor. This study examined how younger cohorts of older Americans and their demographic traits are related to sarcopenic obesity. Methods Generalized estimating equations were used to analyze participants aged 65 years and older, stratified by sex using data from the 2006-2016 Health and Retirement Study (HRS), with survey weights (n=2,896 men and n=4,268 women). Results The findings indicate that the youngest cohort (born between 1948 and 1953) had greater odds of sarcopenic obesity than older cohorts (born before 1931). However, the youngest cohort did not have significantly different risks from those born between 1931 and 1947. Unexpectedly, the youngest cohort of older women living alone tended not to have sarcopenic obesity compared to the older cohorts living alone. These results remained significant even after adjusting for various covariates, including marital status, race, education level, wealth, and other factors. Discussion This paper contributes to the existing literature on population health and demographic change in two ways. First, the risk of sarcopenic obesity is higher among younger cohorts of older Americans relative to older cohorts (born before 1931). Second, living alone may not necessarily be considered a worse health condition, particularly for younger female cohorts.