Assessment of personal exposure to ozone in asthmatic children residing in Mexico City
Assessment of personal exposure to ozone in asthmatic children residing in Mexico City
复制标题
DOI：
10.1590/s0036-36342008000100013
复制
发表时间：
2008-02-01
期刊：
影响因子：
--
通讯作者：
Romieu, Isabelle
中科院分区：
文献类型：
--
作者：
Ramírez-Aguilar, Matiana;Barraza-Villarreal, Albino;Romieu, Isabelle
客观的。一项研究旨在评估居住在墨西哥城的哮喘儿童的个人臭氧暴露（O-3p）。材料和方法。从 1998 年 12 月到 2000 年 4 月，总共招募了 158 名儿童。平均每个儿童使用被动徽章获得了 3 次 O-3p 测量结果。时间-活动模式记录在日记中。根据儿童居住地，从固定站获得每日环境臭氧测量值（O-3a）。 O-3a 和臭氧的水平（按在不同微环境 (O-3w) 中花费的时间进行加权）被用作自变量，以便使用混合效应模型对浓度进行建模。结果。 O-3p 平均值为 7.8 ppb。模型中的主要变量为：室内时间、住所与固定站点之间的距离、随访组和两个交互项（总体R-2=0.50，p
Objective. A study was conducted to evaluate personal ozone exposure (O-3p) among asthmatic children residing in Mexico City. Material and Methods. A total of 158 children were recruited from December 1998 to April 2000. On average, three O-3p measurements were obtained per child using passive badges. Time-activity patterns were recorded in a diary. Daily ambient ozone measurements (O-3a) were obtained from the fixed station, according to children's residence. Levels of O-3a and ozone, weighted by time spent in different micro-environments (O-3w), were used as independent variables in order to model concentrations using a mixed-effects model. Results. Mean O-3p 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 R-2=0.50, p