Pukander J, Luotonen J, Sipilä M, Timonen M, Karma P
Acta Otolaryngol. 1982 May-Jun;93(5-6):447-53. doi: 10.3109/00016488209130903.
The occurrence of acute otitis media was studied over a one-year period in a total population of 146822 persons living in different parts of Finland. Of these 146822 persons, 4583 experienced a total of 6518 otitis attacks giving an annual incidence rate of 4.44% (4.48% in males and 4.07% in females, P less than 0.001). Acute otitis media was strikingly concentrated in the youngest age groups, with the highest annual incidence rates, in the order of 50%, found in infants younger than 2 years. Half of all the episodes occurred before the age of 33 months. The relative risk of getting acute otitis media was about 200 times higher during the first 2 years of life than as an adult. The occurrence of otitic episodes followed seasonal variations, and in urban areas the incidence was significantly (P less than 0.001) higher than in the countryside.
在芬兰不同地区居住的146822人的总人口中，对急性中耳炎的发病情况进行了为期一年的研究。在这146822人中，4583人共经历了6518次耳部感染发作，年发病率为4.44%（男性为4.48%，女性为4.07%，P<0.001）。急性中耳炎显著集中在最年幼的年龄组，年发病率最高，约50%出现在2岁以下的婴儿中。所有发作中有一半发生在33个月龄之前。在生命的头两年患急性中耳炎的相对风险比成年时高约200倍。耳部感染发作的发生呈现季节性变化，并且在城市地区发病率显著高于农村（P<0.001）。
