What this means
People who were frail had far fewer expected healthy working years at age 50 than people who were robust. This study looked at links, so it cannot prove frailty causes the shorter working years.
Plain-English summary written by an AI model from the abstract. The original is below.
- Who it was tested in
- 180,314 adults aged 50 and older from 33 countries
- Kind of research
- A study
The science
- Original title
- Frailty and healthy working life expectancy: a multicohort modelling study.
- Authors
- Shui Y, Zhu J, Huang Z et al.
- Journal
- Journal of global health
- Published
- Oct 19, 2026
- Study type
- Study · in humans
- PMID
- 42895270 ↗
Abstract
Background
Raising the retirement age and extending working years have become key strategies for many countries to mitigate the challenges of global population ageing. However, the association of frailty, a dynamic and reversible clinical condition, with healthy working life expectancy (HWLE) remains unclear.
What they did
We used data from five harmonised health and retirement cohorts from across 33 countries, from which we tracked participants aged ≥50 years from baseline until their last available data point or death. Using this data, we evaluated frailty through the Frailty Index based on the cumulative deficit model, which classifies frailty status as robust, pre-frail, or frail. Then, we used discrete-time multistate Markov models to explore the association between frailty and HWLE, and further stratified our analyses by individual and country-level factors.
What they found
Among 180,314 participants, HWLE at the age of 50 years was 11.87 years (95% confidence interval (CI) = 11.74-12.00) for participants in the robust group, 7.34 years (95% CI = 7.19-7.50) for participants in the pre-frail group, and 3.77 years (95% CI = 3.57-3.97) for participants in the frail group. Compared with participants in the robust group, HWLE was 4.53 years shorter for those in the pre-frail group (Bonferroni-adjusted 95% confidence interval (95% CIBA) = -4.76, -4.29) and 8.11 years shorter for those in the frail group (95% CIBA = -8.38, -7.84). Men had longer HWLE than women in the robust and pre-fail groups. Higher educational attainment and current non-smoking, as well as favourable national economic and political factors, were associated with longer HWLE across frailty strata. While frailty was generally associated with shorter HWLE at the age of 50 years, individual and country-level inequalities were also evident across frailty statuses. These results highlight a need to integrate targeted frailty prevention and intervention programmes with broader initiatives aimed at fostering national economic and political development, thereby promoting healthier, voluntary, and supported work participation in later life.
The authors' abstract, grouped under plain headings from its own section labels.
Shui Y, Zhu J, Huang Z et al. Frailty and healthy working life expectancy: a multicohort modelling study. Journal of global health. 2026. doi:10.7189/jogh.16.04338. PMID: 42895270. https://pubmed.ncbi.nlm.nih.gov/42895270/