Additional file 1.

Studies of wheeze prevalence in North and South America. The table provides the prevalence of current wheezing (in the past year), with confidence intervals, age of the children/adolescents in the study, whether the response was from the parent or the child, sample size with response rates, the year in which the study was conducted and the geographical region for each country, for all studies published between 1990 and 2005.

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Patel et al. Environmental Health 2008 7:57   doi:10.1186/1476-069X-7-57