In all age groups, there was a notable trend that asthma control worsened in lower country income categories.
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Asthma management and control in children, adolescents, and adults in 25 countries: a Global Asthma Network Phase I cross-sectional study.
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The sentences
Overall, we observed a significant trend that inhaled or oral medicines were used by an increasing proportion of individuals as the severity of symptoms increased for all age groups.