Ozone, Suspended Particulates, and Daily Mortality in Mexico City

Borja-Aburto, Víctor Hugo; Loomis, Dana; Bangdiwala, Shrikant I.; Shy, Carl M.; Rascón-Pacheco, Ramón Alberto

doi:10.1093/oxfordjournals.aje.a009099

Cited by 146 publications

(94 citation statements)

References 17 publications

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“…However, in this study, TSP was only measured by one monitor over the entire city every 6 days, therefore lag effects could not be fully explored. The risk estimates reported in the study of BORJA-ABURTO et al [15] are considerably lower than those observed in the present population. Several factors, particularly the lack of accounting for lag effect and the fact that primary and underlying causes of death were considered in the present study, may explain this difference.…”

Section: Discussioncontrasting

confidence: 81%

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Daily respiratory mortality and PM10 pollution in Mexico City: importance of considering place of death

Téllez-Rojo¹,

Romieu²,

Ruíz-Velasco³

et al. 2000

Eur Respir J

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Daily respiratory mortality and PM10 pollution in Mexico City: importance of considering place of death. M.M. Te Âllez-Rojo, I. Romieu, S. Ruiz-Velasco, M-A. Lezana, M. Herna Ândez-Avila. #ERS Journals Ltd 2000. ABSTRACT: Significant associations have been reported between particles with a 50% cut-off aerodynamic diameter of 10 mm (PM10) and ozone ambient concentrations, and daily number of deaths from respiratory causes. The aim of the present study was to assess such associations among elderly ($65 yrs) residents of Mexico City.Ambient air pollution data were provided by the Metropolitan Monitoring Network. During the study period, the average daily PM10 ranged 23.4±175.3 mg . m -3 , and ozone 1 h daily maximums ranged 39.4±216.7 ppb. Information was compiled on the primary and underlying causes of death. The analyses were conducted separately according to place of death (within or out of a hospital unit) using time-series methodology.The total number of deaths from all respiratory causes and mortality for chronic obstructive pulmonary diseases (COPD) were significantly related to PM10 over different lags: an increase of 10 mg . m -3 was related to a 2.9% (95% (CI): 0.9±4.9%) increase and to a 4.1% (95% CI: 1.3%±6.9%) increase with a 3-day lag when death occurred out of medical units, respectively. For deaths occurring in medical units, a longer lag and smaller risk estimate was observed. An interactive effect between PM10 and ozone was detected.This study confirms that there is an important impact of PM10 on respiratory morbidity among elderly subjects. It also indicates that accounting for primary and underlying causes of death, and considering place of death may reduce misclassification and provide more accurate estimates of the adverse impact of PM10 on mortality.

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Section: Discussioncontrasting

confidence: 81%

“…In an earlier study conducted in Mexico City, BORJA et al [15] reported an excess mortality of 0.5% (95% CI: 0.3±0.7%) associated with a 10 mg . m -3 increase in total suspended particulates (TSPs) assuming that the PM10/ TSP ratio is close to 0.50, this estimate corresponds approximately to a 1.0% (95% CI: 0.6±1.4%) per 10 mg .…”

Section: Discussionmentioning

confidence: 94%

Daily respiratory mortality and PM10 pollution in Mexico City: importance of considering place of death

Téllez-Rojo¹,

Romieu²,

Ruíz-Velasco³

et al. 2000

Eur Respir J

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“…A significant number of studies have found positive associations between increased daily morbidity and mortality and suspended particles in air pollution (Loomis et al, 1996(Loomis et al, , 1999Borja-Aburto et al, 1997Laden et al, 2000;Lippman et al, 2000;Sunyer et al, 2000;Sarnat et al, 2001;Vajanapoom et al, 2002). Increased rates of asthma exacerbation, respiratory symptoms, reduced lung function, increased hospitalization rates, and greater use of medications have also been found (Tellez-Rojo et al, 1997;Ilabaca et al, 1999;Romieu et al, 1999Romieu et al, , 2002Panella et al, 2000;Utell and Frampton, 2000;Anderson et al, 2001).…”

Section: Introductionmentioning

confidence: 99%

Relationship between indoor, outdoor, and personal fine particle concentrations for individuals with COPD and predictors of indoor-outdoor ratio in Mexico city

Cortez‐Lugo

Moreno-Macías

Holguin-Molina

et al. 2007

J Expo Sci Environ Epidemiol

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“…Recent epidemiological studies have found ambient particulate matter concentrations to be associated with an increase in cardiovascular, lung cancer and total mortality, as well as with a variety of morbidity indicators (Pope et al, 1991;Dockery and Pope, 1994;Dockery et al, 1993;Schwartz, 1994a,b;Schwartz et al, 1996a,b;Pope et al, 1995a,b;Borja -Aburto et al, 1997 ) . The interpretation of these results is unclear, since outdoor particle levels used in these studies to estimate exposures may not reflect true population exposures to particulate matter (Sexton et al, 1984;Spengler et al, 1985;Clayton et al, 1993 ).…”

Section: Introductionmentioning

confidence: 99%

Relationships among personal, indoor, and outdoor fine and coarse particle concentrations for individuals with COPD

Rojas-Bracho

Suh

Koutrakis

2000

J Expo Sci Environ Epidemiol

149

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This study characterizes the personal, indoor, and outdoor PM 2.5 , PM 10 , and PM 2.5 ± 10 exposures of 18 individuals with chronic obstructive pulmonary disease ( COPD ) living in Boston, MA. Monitoring was performed for each participant for six consecutive days in the winters of 1996 or 1997 and for six to twelve days in the summer of 1996. On each day, 12 -h personal, indoor, and outdoor samples of PM 2.5 and PM 10 were collected simultaneously. Home characteristic information and time ± activity patterns were also obtained. Personal exposures were higher than corresponding indoor and outdoor concentrations for all particle measures and for all seasons, except for winter indoor PM 2.5 ± 10 levels, which were higher than personal and outdoor levels. Higher personal exposures may be due to the proximity of the individuals to particle sources, such as cooking and cleaning. Indoor concentrations were associated with both outdoor concentrations and personal exposures ( as determined by individual least square regression analyses ) , with associations strongest for PM 2.5 . Indoor PM 2.5 concentrations were significantly associated with outdoor and personal levels for 12 and 15 of the 17 individuals, respectively. Both the strength and magnitude of the associations varied by individual. Also, personal PM 2.5 , but not PM 2.5 ± 10 , exposures were associated with outdoor levels, with 10 of the 17 subjects having significant associations. The strength of the personal ± outdoor association for PM 2.5 was strongly related to that for indoor and outdoor levels, suggesting that home characteristics and indoor particulate sources were key determinants of the personal ± outdoor association for PM 2.5 . Air exchange rates were found to be important determinants of both indoor and personal levels. Again, substantial interpersonal variability in the personal ± outdoor relationship was found, as personal exposures varied by as much as 200% for a given outdoor level.

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Ozone, Suspended Particulates, and Daily Mortality in Mexico City

Cited by 146 publications

References 17 publications

Daily respiratory mortality and PM10 pollution in Mexico City: importance of considering place of death

Daily respiratory mortality and PM10 pollution in Mexico City: importance of considering place of death

Relationship between indoor, outdoor, and personal fine particle concentrations for individuals with COPD and predictors of indoor-outdoor ratio in Mexico city

Relationships among personal, indoor, and outdoor fine and coarse particle concentrations for individuals with COPD

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