The common risk factors are: sibling history of OM, victims of atopy and cleft palate, early onset of the first episode, and attendance in day care centers.

• 常见的危险因素为:兄弟姐妹有中耳炎病史、过敏性疾病患者、裂患者、第一次发病年龄较小者、以及托儿所的学童。