The asthma prevalence and burden are high among children. However, available data for asthma hospitalisation in children have been mainly reported as annual rates of asthma hospitalisations.1 The proportion of children with asthma that are hospitalised because of asthma during their lifetime is still unknown. INASMA was a cross-sectional, population-based, all-age, nationwide telephone survey conducted in 2010 to estimate asthma prevalence and control in Portugal. Details on INASMA methods are described elsewhere.2 We report the proportion of lifetime hospitalisation (LH) for asthma in Portuguese children and adolescents aged 6-17 years (hereafter referred to as ‘children’). INASMA included 563 participants in this age group, representative of the Portuguese paediatric population.3 This sample size allowed us to estimate the prevalence of LH with a margin of error of 0.1, considering a … [Full text of this article]