Aging without Partner or Children: Does Solo Aging Increase Mortality Risk Among Older Americans?

Background and Purpose. Older adults without a partner and children — termed solo agers, elder orphans, or kinless elders in the literature — are presumed vulnerable to health challenges as they lack the traditional family support network, yet empirical evidence remains limited. This study examines whether solo agers face greater mortality risk than family-embedded peers, whether socioeconomic differences account for observed disparities, and whether solo agers are more vulnerable to mortality risks associated with health challenges.

Methods. We used 13 waves (2011–2023) of the National Health and Aging Trends Study (NHATS), a nationally representative longitudinal study of Medicare beneficiaries aged 65 and older, for this analysis. The sample comprised 7,609 community-dwelling and residential care respondents (not nursing home) at baseline, of whom 2,814 (37%) died over the observation period. Family embeddedness was operationalized as three categories: partnered (married or living with a partner, n=3,798, 49.9%), children only (no partner, n=3,309, 43.5%), and solo ager — no partner and no children (n=502, 6.6%). Survey-weighted Cox proportional hazards regression models were estimated to assess mortality risk differences between solo agers and the other two groups, the mediating role of socioeconomic status, and interaction effects of family embeddedness with health indicators.

Results. In unadjusted models, partnered older adults had significantly lower mortality risks than solo agers (HR = 0.62, 95% CI 0.51–0.74), while those with children only did not differ significantly from solo agers (HR = 1.06, 95% CI 0.88–1.27). After adjusting for demographic characteristics, the partnered advantage attenuated by 28.6% but remained significant (HR = 0.79, 95% CI, 0.64–0.99). Adding socioeconomic indicators (income, education, assets) eliminated the partnered survival advantage (HR = 1.06, 95% CI 0.85–1.32), accounting for an additional 33.6% reduction. Health covariates did not alter this pattern. Interaction analyses revealed that the hazard ratio associated with each additional chronic condition was significantly steeper for solo agers (HR = 1.20 per condition) than for those with children only (HR = 1.06, interaction p = 0.03), indicating that having children buffers the mortality consequences of multimorbidity. Conversely, dementia significantly increased mortality risk among partnered and children-only groups but not among solo agers, a pattern interpreted as survival selection — solo agers with dementia who survived to interview represent a robust subset, compressing the apparent dementia-mortality gradient. No significant interaction was found with self-care and mobility limitations.

Conclusions and Implications. Solo agers face greater mortality risk than partnered older adults, but this disparity is primarily attributable to socioeconomic advantages of the latter rather than partner presence per se. Notably, solo agers and those with children only do not differ significantly in mortality risk, tempering the vulnerability narrative. However, solo agers with multiple chronic conditions represent a genuinely high-risk group warranting further research on the reasons for such vulnerability and targeted intervention, such as wellness checks, community health worker outreach, and healthcare advocacy. Findings underscore the need for a nuanced, evidence-based understanding of solo ager vulnerability in policies and practices related to older adults.

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