Loss of life expectancy attributed to long-term ozone exposure in Chinese older adults: Cross-cohort analysis from 3 national cohorts
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Notice bibliographique
Résumé
• A cross-cohort analysis of 3 national cohorts to investigate the ozone-mortality association in Chinese older adults. • Per 10-ppb increase in warm-season ozone was associated with a hazard ratio of 1.076 (95% CI: 1.050–1.102) for mortality. • Ozone exposure contributed to 0.88 million deaths and 9.05 million years of life lost, equivalent to a loss of life expectancy of 0.93 years in 2019. Cohort evidence linking ozone (O 3 ) exposure with mortality was sparsely investigated among the elderly in low- and middle-income countries. This study aims to quantify mortality risk and burden attributed to chronic O 3 exposure in Chinese older adults. A total of 30,874 older adults aged ≥65 years were recruited from 3 national dynamic cohorts across 29 provincial regions in China, 2005–2018. Annual warm-season (April–September) O 3 and year-round PM 2.5 concentrations were estimated through well-validated satellite-based spatiotemporal models and were assigned to participants for each survey year. Time-dependent Fragility Cox models with random intercept for study cohort were employed to quantify O 3 -mortality association, adjusting for demographic, behavioral, health, and environmental covariates. A counterfactual causal framework was used for assessment of O 3 -attributable premature deaths in older adults based on exposure–response relationship derived from multi-cohort two-pollutant analysis (+PM 2.5 ). Years of life lost and loss of life expectancy were subsequently evaluated based on the burden estimation model by incorporating the comparative risk assessment method and reference life tables. 16,939 death events occurred during 0.16 million person-years of follow-up surveys. Each 10-ppb increase in O 3 exposure was linked with a hazard ratio of 1.076 (95% confidence interval [CI]: 1.050, 1.102) for all-cause mortality. By achieving the counterfactual target (WHO AQG 2021) of 60 μg/m 3 for warm-season O 3 , 0.88 (95% CI: 0.60, 1.14) million premature deaths could be avoidable among Chinese older population in 2019, yielding an inconspicuous reduction of 0.11 million compared to the estimate in 2011 (0.99 million, 95% CI: 0.68, 1.28). O 3 -attributable deaths amounted to 9.05 (95% CI: 6.19, 11.70) million years of life lost in 2019, equivalent to a loss of life expectancy of 0.93 (95% CI: 0.63, 1.20) years for older population in China. Our multi-cohort analysis suggested that reducing ambient O 3 exposure could increase the life expectancy of Chinese older adults, which may contribute to the development of healthy aging strategies and national cleaning air policies.
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Scores Codex et Gemma par catégorie
| Catégorie | Codex | Gemma |
|---|---|---|
| Métarecherche | 0,003 | 0,003 |
| Méta-épidémiologie (sens strict) | 0,000 | 0,000 |
| Méta-épidémiologie (sens large) | 0,001 | 0,000 |
| Bibliométrie | 0,001 | 0,004 |
| Études des sciences et des technologies | 0,000 | 0,000 |
| Communication savante | 0,000 | 0,001 |
| Science ouverte | 0,001 | 0,000 |
| Intégrité de la recherche | 0,000 | 0,001 |
| Charge utile insuffisante (le modèle a refusé de juger) | 0,001 | 0,000 |
Scores machine (provisoires)
Les deux têtes enseignantes du modèle étudiant, lues sur ce travail. Un score ordonne la base pour la relecture; il n'affirme jamais une catégorie, et le statut de validation accompagne chaque rangée tel quel.
Scores de référence d'un modèle non mature (critères de maturité non atteints, 7 itérations). Un score ordonne; il n'affirme jamais une catégorie.
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