Fig. 3
![Fig. 3](http://media.springernature.com/full/springer-static/image/art%3A10.1186%2Fs12890-018-0621-9/MediaObjects/12890_2018_621_Fig3_HTML.gif)
Multivariate regression analysis investigating the risk factors for asthma: Asthma population (1931 subjects) versus non-asthma population (28,586 subjects); OR [95% CI] = odds ratio [95% Confidence Interval]. The results presented are adjusted for age (18–34,35–49, ≥50 years), gender and country (Egypt, Kuwait, Saudi Arabia, Turkey, UAE)