Assessment of personal exposure to ozone in asthmatic children residing in Mexico City
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.
Main Authors: | 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 |
---|---|
Format: | Digital revista |
Language: | English |
Published: |
Instituto Nacional de Salud Pública
2008
|
Online Access: | http://www.scielo.org.mx/scielo.php?script=sci_arttext&pid=S0036-36342008000100013 |
Tags: |
Add Tag
No Tags, Be the first to tag this record!
|
Similar Items
-
Validez en el registro del pico espiratorio máximo de niños asmáticos de la Ciudad de México
by: Jiménez-Millán,Diana, et al.
Published: (2007) -
Dengue 2 virus enhancement in asthmatic and non asthmatic individual
by: Guzman,Maria G., et al.
Published: (1992) -
The systemic family assessment system: its validity with asthmatic children and their families
by: Peçanha,Dóris Lieth, et al.
Published: (2007) -
Linear growth in asthmatic children
by: Antonio,Maria Ângela Reis de Góes Monteiro, et al.
Published: (2003) -
Susceptibility of asthmatic children to respiratory infection
by: Pereira,Júlio C. R., et al.
Published: (1997)