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对１２３例毛细支气管炎的病情程度，病程及预后与其体重的关系作了探讨，结果：营养不良儿发生中、重型毛细支气管炎的病例分别占２７．８％及３３．３％，较正常体重儿的１７．５％及１０．５％显著增加（Ｐ＜０．００５），平均病程延长８天左右（Ｐ＜０．００１），且预后差。肥胖儿发生中、重型毛细支气管炎的病例分别占２９．８％及３７．５％，明显高于正常体重儿（Ｐ＜０．００５），平均病程延长４天（Ｐ＜０．００１），且预后差，表明：婴幼儿体重与毛细支气管炎病情程度、病程及预后有关。提示：体重不足或过重可视为毛细支气管炎病情发展的危险因素之一。
123 cases of bronchiolitis disease severity, duration and prognosis of its relationship with body weight, the results: malnutrition occurred, the incidence of severe bronchiolitis accounted for 27.8% and 33.3%, respectively, compared with normal body weight 17.5% and 10.5% of children were significantly increased (P <0.005), the average duration of lengthening was about 8 days (P <0.001), and the prognosis was poor. The incidence of severe bronchiolitis accounted for 29.8% and 37.5% respectively in obese children, which was significantly higher than that of normal weight children (P <0.005). The average course of disease was prolonged by 4 days (P <0.001) And the prognosis is poor, indicating that: infant weight and bronchitis disease severity, duration and prognosis. Tip: underweight or overweight can be considered as one of the risk factors for the development of bronchiolitis.