Reproducibility of retrospective assessment of outdoor time-activity patterns as an individual determinant of long-term ambient ozone exposure.
Long-term effects of ambient ozone pollution are not clearly established to date.
Epidemiological assessment of these effects might benefit from improved exposure measures.
Tools to retrospectively assess long-term time-activity patterns as a potentially important co-predictor of true exposure have not yet been developed.
Three self-completed questionnaires for the retrospective assessment of outdoor time-activity patterns were tested in 168 lifelong residents (ages 17-21) of California.
A test-retest design (within 5-7 days) was employed. (1) Based on a set of questions (AQUES) on outdoor'heavy'and'moderate'activity, h/day engaged in activity were derived.
Definition of activity levels was based on published data regarding energy expenditure of physical activities. (2) A table format (ATAB) asked quantitative questions for each activity engaged in. (3) A 24-hour-log (A24H) had to be completed to indicate time spent outdoors in four levels of activity (heavy, moderate, light, at rest) on a'typical day' (n=44).
Test-retest reliability was assessed.
Comparison across approaches was restricted to the subgroup of 44 students that completed all three approaches.
All approaches yielded reasonably reliable results (between-test variance 13-39% of total variance, Spearman rank correlations : 0.68-0.86 for time spent in outdoor activities).
Population mean values differed across approaches, ranging from 1. (...)
Mots-clés Pascal : Ozone, Pollution air, Epidémiologie, Evaluation, Exposition, Rétrospective, Long terme, Homme, Méthode étude, Activité, Exercice physique, Extérieur, Etude temporelle, Questionnaire
Mots-clés Pascal anglais : Ozone, Air pollution, Epidemiology, Evaluation, Exposure, Retrospective, Long term, Human, Investigation method, Activity, Physical exercise, Outer, Temporal study, Questionnaire
Notice produite par :
Inist-CNRS - Institut de l'Information Scientifique et Technique
Cote : 98-0056869
Code Inist : 002B30A01A1. Création : 14/05/1998.