Smith J M
Br J Dis Chest. 1976 Apr;70(2):73-7. doi: 10.1016/0007-0971(76)90009-7.
The prevalence of asthma and wheezing in children in Birmingham in 1974-5 was compared with the previous studies in 1968-9 and 1956-7. The frequency of asthma increased over the 20-year period, although the rate of increase had slowed. Asthma was commoner in boys than in girls. Children of the same racial group were more prone to asthma, and probably to other atopic diseases, if born in England than if born in poor tropical countries. Environmental factors in early life profoundly influence the prevalence of asthma in childhood.
对1974 - 1975年伯明翰儿童哮喘和喘息的患病率与1968 - 1969年以及1956 - 1957年之前的研究进行了比较。在这20年期间，哮喘的发病率有所上升，尽管上升速度已经放缓。哮喘在男孩中比在女孩中更为常见。同一种族群体的儿童，如果出生在英格兰，比出生在贫穷热带国家的儿童更容易患哮喘，也可能更容易患其他过敏性疾病。儿童早期的环境因素对儿童期哮喘的患病率有深远影响。
