International Study of Asthma and Allergies in Childhood (ISAAC): prevalence of asthma and asthma-related symptoms among Brazilian schoolchildren.

摘要: We have studied the prevalence of asthma and its symptoms using a standard written questionnaire (WQ) designed for International Study Asthma Allergies in Children (ISAAC). The WQ (questions 1 through 8 related to asthma) was applied 13,604 children aged 6-7 years from six Brazilian cities: Porto Alegre (South, N = 2,976), Curitiba 1,664), Sao Paulo (Southeast, 3,005), Uberlândia 3,002), Itabira 1,551) Recife (Northeast, 1,406). At age 13-14 20,554 schoolchildren living 3,198), 3,008), 3,001), 2,134), Salvador 3,119) 3,086). parents younger answered WQ, whereas adolescents themselves. response rates were 72% 93% 6-7-year-old 13-14-year-old children, respectively. There slight predominance male population studied. In group 6-7-year-olds, physician diagnosed 7.3% boys 4.9% girls: 13-14-year-olds 9.8% 10.2%, severity similar both groups, wheezing following exercise more frequent among adolescents. keeping with studies other parts world, comparison between reported revealed significantly lower frequency asthma, suggesting that study population, is underdiagnosed.