Exercise linked to lower all-cause mortality in older Chinese adults; industrial pollution did not modify the association
In a Chinese cohort of adults aged 65 and older, self-reported current exercise was associated with lower all-cause mortality after adjustment. No significant interaction with four county-level industrial air pollution indicators was found. [1]
Automatic summary · not editorially reviewed
The key findings
The analysis included 16,954 participants aged 65 or older, followed over three waves spanning six years. [1]
Self-reported current exercise was associated with lower all-cause mortality after full adjustment (hazard ratio 0.835, 95% confidence interval 0.773–0.902). [1]
The interaction between exercise habits and each of the four industrial air pollution indicators was not significant (all p above 0.05). [1]
The source at a glance
- Study type / format
- Observational longitudinal survival analysis (cohort study)
- Population / context
- 16,954 Chinese adults aged 65 or older in the Chinese Longitudinal Healthy Longevity Survey, 2008–2014.
- Summary based on
- Study abstract
- Original publication
- September 4, 2026
Older Chinese adults followed six years
The study used the Chinese Longitudinal Healthy Longevity Survey, 2008–2014, with multistage stratified sampling across 23 provinces. It included 16,954 participants aged 65 or older, followed over three waves spanning six years. Self-reported current exercise habits and survival outcomes were recorded, along with health status, sex, smoking, baseline age, residence, body mass index, functional status and comorbidity count. County-level industrial air pollution indicators were matched to each person by residence.
Supporting source [1]
Exercise estimate held after adjustment
In the survival models, self-reported current exercise was significantly associated with lower all-cause mortality after full adjustment (hazard ratio 0.835, 95% confidence interval 0.773–0.902). Sulfur dioxide emissions showed only a weak association in univariate analysis (hazard ratio 1.023, 95% confidence interval 0.942–1.111) that was attenuated after adjustment (hazard ratio 1.001, 95% confidence interval 0.874–1.146). Soot-related indicators showed no significant mortality associations.
Supporting source [1]
No interaction with pollution indicators
The interaction between exercise habits and each of the four industrial air pollution indicators was not statistically significant (all p above 0.05). The authors describe the exercise association as robust to adjustment for covariates. This is an observational survival analysis, so the associations do not establish that exercise causes the lower mortality. Only the abstract was reviewed; the full text was not reviewed.
Supporting source [1]
How to interpret this
Abstract only; the full text was not reviewed. This is an observational survival analysis, so associations are not causal. Exercise was self-reported, and pollution was measured at county level rather than individually.
Based on the study abstract; the full paper, tables and supplementary data were not reviewed.
Source & supporting passages
Wang W, Xu J, Wang C, Zhao Y, Ren H. · europepmc.org · September 4, 2026