| Título: | Assessment of personal exposure to ozone in asthmatic children residing in Mexico City |
| Autores: |
Ramírez-Aguilar,Matiana Barraza-Villarreal,Albino Moreno-Macías,Hortensia Winer,Arthur M Cicero-Fernández,Pablo Vélez-Márquez,Ma. Guadalupe Doris Cortez-Lugo,Marlene Sienra-Monge,Juan José Romieu,Isabelle |
| Fecha: | 2008-02-01 |
| Publicador: | SCIELO |
| Fuente: |
 |
| Tipo: | journal article |
| Tema: |
personal measurements ozone asthmatics Mexico City activity patterns |
| Descripción: | OBJECTIVE: A study was conducted to evaluate personal ozone exposure (O3p) among asthmatic children residing in Mexico City. MATERIAL AND METHODS: A total of 158 chil-dren were recruited from December 1998 to April 2000. On average, three O3p measurements were obtained per child using passive badges. Time-activity patterns were recorded in a diary. Daily ambient ozone measurements (O3a) were obtained from the fixed station, according to childrens residence. Levels of O3a and ozone, weighted by time spent in different micro-environments (O3w), were used as independent variables in order to model O3p concentrations using a mixed-effects model. RESULTS: Mean O3p was 7.8 ppb. The main variables in the model were: time spent indoors, distance between residence and fixed station, follow-up group, and two interaction terms (overall R²=0.50, p<0.05). CONCLUSIONS: The O3w concentrations can be used as a proxy for O3p, taking into account time-activity patterns and the place of residence of asthmatic Mexican children. |
| Idioma: | Inglés |
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