Hamman R F, Halil T, Holland W W
Br J Prev Soc Med. 1975 Dec;29(4):228-38. doi: 10.1136/jech.29.4.228.
The frequency of asthma in 10 971 school-children between the ages of 5 and 14 years was reported by their parents to be 3-8%. Of these, 20-7% were said to have had bronchitis, 5-9% pneumonia, and 4-7% eczema. Asthma was reported more commonly in boys than girls and was greatest in children of social classes I and II. One-third of the children were reported to have their first attack before the age of 2 years. Few (18%) first attacks started after the age of 5 years. There was no evidence that bronchitis predisposed to the later development of asthma, or vice versa. Within each age-sex group children with a history of asthma had lower peak expiratory flow rates than children who gave no such history. These diffences in PEFR were greater than for children with a history of bronchitis.
据家长报告，在10971名5至14岁的学童中，哮喘发病率为3%至8%。其中，据说20%至7%的儿童患过支气管炎，5%至9%患过肺炎，4%至7%患过湿疹。据报告，哮喘在男孩中比在女孩中更常见，在社会阶层I和II的儿童中发病率最高。据报告，三分之一的儿童在2岁之前首次发作哮喘。很少（18%）有儿童在5岁之后首次发作哮喘。没有证据表明支气管炎会诱发后来的哮喘，反之亦然。在每个年龄性别组中，有哮喘病史的儿童的呼气峰值流速低于没有此类病史的儿童。这些呼气峰值流速的差异比有支气管炎病史的儿童更大。
