Overview of cross-sectional studies on physical activity and asthma prevalence.

Overview of study characteristics, study quality based on the Newcastle-Ottawa Scale (NOS), odds ratios and author's conclusions of cross-sectional studies on physical activity and asthma prevalence. Odds ratios are noted here only if odds ratios or equivalents with 95% confidence intervals are specified in the article. Author's conclusions are noted only if the author mentions a conclusion on the relation between physical activity and asthma prevalence. If not, a conclusion was drawn based on the data in the article. In this case the conclusion is noted between [ ].
CI; confidence interval, PA; physical activity, aOR; adjusted odds ratio, aHR; adjusted hazard ratio, OR; odds ratio, aGMR; adjusted geometric mean ratio, MVPA; moderate to vigorous physical activity, VPA; vigorous physical activity.
*P<0.05.
**P<0.01.
***P<0.001.
#afrequency of physical activity (PA).
#bparticipation of enough PA to meet the recommendations for PA.
#cEnergy Expenditure (EE).
#dMetabolic Equivalent of Task (MET).
#ephysical inactivity (e.g. TV watching, computer play).
#fphysically active vs. physically not active group.