Figure 3
From: Operational definitions of asthma in recent epidemiological studies are inconsistent
Prevalence of asthma according to several definitions of the “Current asthma” based on ISAAC questionnaire. Prevalence estimates for Portuguese children aged 6, 7, 13 and 14 years old were computed using data from the INAsma survey (also see Additional file 5). *95% CI not available. n.a. – not available. Proportion of people with asthma using the INAsma data are represented by •; prevalence stated in other studies are represented by ■. Lines represent the CI (when available). Shades gather the values for the same definition.