Satellite-based estimates of long-term exposure to fine particles and association with mortality in elderly Hong Kong residents
Chit Ming Wong, Hak Kan Lai, Hilda Tsang, Thuan Quoc Thach, G. Neil Thomas, Kin Bong Hubert Lam, King Pan Chan, Lin Yang, Alexis K.H. Lau, Jon G. Ayres, Siu Yin Lee, Wai Man Chan, Anthony J. Hedley, Tai Hing Lam
Background: A limited number of studies on long-term effects of particulate matter with aerodynamic diameter < 2.5 μm (PM2.5) on health suggest it can be an important cause of morbidity and mortality. In Asia where air quality is poor and deteriorating, local data on long-term effects of PM2.5to support policy on air quality management are scarce. Objectives: We assessed long-term effects of PM2.5on the mortality in a single Asian city. Methods: For 10–13 years, we followed up a cohort of 66,820 participants ≥ 65 years of age who were enrolled and interviewed in all 18 Elderly Health Centres of the Department of Health, Hong Kong, in 1998–2001. Their residential addresses were geocoded into x- and y-coordinates, and their proxy exposures to PM2.5at their addresses in 1 × 1 km grids were estimated from the U.S. National Aeronautics and Space Administration (NASA) satellite data. We used Cox regression models to calculate hazard ratios (HRs) of mortality associated with PM2.5. Results: Mortality HRs per 10-μg/m3increase in PM2.5were 1.14 (95% CI: 1.07, 1.22) for all natural causes, 1.22 (95% CI: 1.08, 1.39) for cardiovascular causes, 1.42 (95% CI: 1.16, 1.73) for ischemic heart disease, 1.24 (95% CI: 1.00, 1.53) for cerebro vascular disease, and 1.05 (95% CI: 0.90, 1.22) for respiratory causes. conclusions: Our methods in using NASA satellite data provide a readily accessible and affordable approach to estimation of a sufficient range of individual PM2.5exposures in a single city. This approach can expand the capacity to conduct environmental accountability studies in areas with few measurements of fine particles.
Environmental Health Perspectives
https://doi.org/10.1289/ehp.1408264
10.1289/ehp.1408264
Wong, C. M., Lai, H. K., Tsang, H., Thach, T. Q., Neil Thomas, G., Lam, K. B. H., Chan, K. P., Yang, L., Lau, A. K. H., Ayres, J. G., Lee, S. Y., Chan, W. M., Hedley, A. J., & Lam, T. H. (2015). Satellite-based estimates of long-term exposure to fine particles and association with mortality in elderly Hong Kong residents. Environmental Health Perspectives, 123(11), 1167-1172. https://doi.org/10.1289/ehp.1408264
Wong, Chit Ming ; Lai, Hak Kan ; Tsang, Hilda ; Thach, Thuan Quoc ; Neil Thomas, G. ; Lam, Kin Bong Hubert ; Chan, King Pan ; Yang, Lin ; Lau, Alexis K.H. ; Ayres, Jon G. ; Lee, Siu Yin ; Chan, Wai Man ; Hedley, Anthony J. ; Lam, Tai Hing. / Satellite-based estimates of long-term exposure to fine particles and association with mortality in elderly Hong Kong residents. In: Environmental Health Perspectives. 2015 ; Vol. 123, No. 11. pp. 1167-1172.
@article{918ae1369707457ab24653458a01abcb,
title = "Satellite-based estimates of long-term exposure to fine particles and association with mortality in elderly Hong Kong residents",
abstract = "Background: A limited number of studies on long-term effects of particulate matter with aerodynamic diameter < 2.5 μm (PM2.5) on health suggest it can be an important cause of morbidity and mortality. In Asia where air quality is poor and deteriorating, local data on long-term effects of PM2.5to support policy on air quality management are scarce. Objectives: We assessed long-term effects of PM2.5on the mortality in a single Asian city. Methods: For 10–13 years, we followed up a cohort of 66,820 participants ≥ 65 years of age who were enrolled and interviewed in all 18 Elderly Health Centres of the Department of Health, Hong Kong, in 1998–2001. Their residential addresses were geocoded into x- and y-coordinates, and their proxy exposures to PM2.5at their addresses in 1 × 1 km grids were estimated from the U.S. National Aeronautics and Space Administration (NASA) satellite data. We used Cox regression models to calculate hazard ratios (HRs) of mortality associated with PM2.5. Results: Mortality HRs per 10-μg/m3increase in PM2.5were 1.14 (95% CI: 1.07, 1.22) for all natural causes, 1.22 (95% CI: 1.08, 1.39) for cardiovascular causes, 1.42 (95% CI: 1.16, 1.73) for ischemic heart disease, 1.24 (95% CI: 1.00, 1.53) for cerebro vascular disease, and 1.05 (95% CI: 0.90, 1.22) for respiratory causes. conclusions: Our methods in using NASA satellite data provide a readily accessible and affordable approach to estimation of a sufficient range of individual PM2.5exposures in a single city. This approach can expand the capacity to conduct environmental accountability studies in areas with few measurements of fine particles.",
author = "Wong, {Chit Ming} and Lai, {Hak Kan} and Hilda Tsang and Thach, {Thuan Quoc} and {Neil Thomas}, G. and Lam, {Kin Bong Hubert} and Chan, {King Pan} and Lin Yang and Lau, {Alexis K.H.} and Ayres, {Jon G.} and Lee, {Siu Yin} and Chan, {Wai Man} and Hedley, {Anthony J.} and Lam, {Tai Hing}",
doi = "10.1289/ehp.1408264",
journal = "Environmental Health Perspectives",
publisher = "Public Health Services, US Dept of Health and Human Services",
Wong, CM, Lai, HK, Tsang, H, Thach, TQ, Neil Thomas, G, Lam, KBH, Chan, KP, Yang, L, Lau, AKH, Ayres, JG, Lee, SY, Chan, WM, Hedley, AJ & Lam, TH 2015, 'Satellite-based estimates of long-term exposure to fine particles and association with mortality in elderly Hong Kong residents', Environmental Health Perspectives, vol. 123, no. 11, pp. 1167-1172. https://doi.org/10.1289/ehp.1408264
Satellite-based estimates of long-term exposure to fine particles and association with mortality in elderly Hong Kong residents. / Wong, Chit Ming; Lai, Hak Kan; Tsang, Hilda; Thach, Thuan Quoc; Neil Thomas, G.; Lam, Kin Bong Hubert; Chan, King Pan; Yang, Lin; Lau, Alexis K.H.; Ayres, Jon G.; Lee, Siu Yin; Chan, Wai Man; Hedley, Anthony J.; Lam, Tai Hing.
In: Environmental Health Perspectives, Vol. 123, No. 11, 01.11.2015, p. 1167-1172.
T1 - Satellite-based estimates of long-term exposure to fine particles and association with mortality in elderly Hong Kong residents
AU - Wong, Chit Ming
AU - Lai, Hak Kan
AU - Tsang, Hilda
AU - Thach, Thuan Quoc
AU - Neil Thomas, G.
AU - Lam, Kin Bong Hubert
AU - Chan, King Pan
AU - Yang, Lin
AU - Lau, Alexis K.H.
AU - Ayres, Jon G.
AU - Lee, Siu Yin
AU - Chan, Wai Man
AU - Hedley, Anthony J.
AU - Lam, Tai Hing
N2 - Background: A limited number of studies on long-term effects of particulate matter with aerodynamic diameter < 2.5 μm (PM2.5) on health suggest it can be an important cause of morbidity and mortality. In Asia where air quality is poor and deteriorating, local data on long-term effects of PM2.5to support policy on air quality management are scarce. Objectives: We assessed long-term effects of PM2.5on the mortality in a single Asian city. Methods: For 10–13 years, we followed up a cohort of 66,820 participants ≥ 65 years of age who were enrolled and interviewed in all 18 Elderly Health Centres of the Department of Health, Hong Kong, in 1998–2001. Their residential addresses were geocoded into x- and y-coordinates, and their proxy exposures to PM2.5at their addresses in 1 × 1 km grids were estimated from the U.S. National Aeronautics and Space Administration (NASA) satellite data. We used Cox regression models to calculate hazard ratios (HRs) of mortality associated with PM2.5. Results: Mortality HRs per 10-μg/m3increase in PM2.5were 1.14 (95% CI: 1.07, 1.22) for all natural causes, 1.22 (95% CI: 1.08, 1.39) for cardiovascular causes, 1.42 (95% CI: 1.16, 1.73) for ischemic heart disease, 1.24 (95% CI: 1.00, 1.53) for cerebro vascular disease, and 1.05 (95% CI: 0.90, 1.22) for respiratory causes. conclusions: Our methods in using NASA satellite data provide a readily accessible and affordable approach to estimation of a sufficient range of individual PM2.5exposures in a single city. This approach can expand the capacity to conduct environmental accountability studies in areas with few measurements of fine particles.
AB - Background: A limited number of studies on long-term effects of particulate matter with aerodynamic diameter < 2.5 μm (PM2.5) on health suggest it can be an important cause of morbidity and mortality. In Asia where air quality is poor and deteriorating, local data on long-term effects of PM2.5to support policy on air quality management are scarce. Objectives: We assessed long-term effects of PM2.5on the mortality in a single Asian city. Methods: For 10–13 years, we followed up a cohort of 66,820 participants ≥ 65 years of age who were enrolled and interviewed in all 18 Elderly Health Centres of the Department of Health, Hong Kong, in 1998–2001. Their residential addresses were geocoded into x- and y-coordinates, and their proxy exposures to PM2.5at their addresses in 1 × 1 km grids were estimated from the U.S. National Aeronautics and Space Administration (NASA) satellite data. We used Cox regression models to calculate hazard ratios (HRs) of mortality associated with PM2.5. Results: Mortality HRs per 10-μg/m3increase in PM2.5were 1.14 (95% CI: 1.07, 1.22) for all natural causes, 1.22 (95% CI: 1.08, 1.39) for cardiovascular causes, 1.42 (95% CI: 1.16, 1.73) for ischemic heart disease, 1.24 (95% CI: 1.00, 1.53) for cerebro vascular disease, and 1.05 (95% CI: 0.90, 1.22) for respiratory causes. conclusions: Our methods in using NASA satellite data provide a readily accessible and affordable approach to estimation of a sufficient range of individual PM2.5exposures in a single city. This approach can expand the capacity to conduct environmental accountability studies in areas with few measurements of fine particles.
U2 - 10.1289/ehp.1408264
DO - 10.1289/ehp.1408264
JO - Environmental Health Perspectives
JF - Environmental Health Perspectives
Wong CM, Lai HK, Tsang H, Thach TQ, Neil Thomas G, Lam KBH et al. Satellite-based estimates of long-term exposure to fine particles and association with mortality in elderly Hong Kong residents. Environmental Health Perspectives. 2015 Nov 1;123(11):1167-1172. https://doi.org/10.1289/ehp.1408264