Symptom score and pulmonary function expressed as peak expiratory flow(PEF), peak expiratory flow rate (PEFR) and forced expiratory volume in one second (FEV1) were recorded.

观察两组每日症状评分，早、晚最大呼气峰流速测定（PEF），肺功能检查（FEV1）。

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Secondary endpoints, including forced expiratory volume in 1 s, peak expiratory flow, use of as-needed medication, and number of nights with awakenings were similar between genotype groups.

次要终点指标包括1秒呼出气量，峰流速，急救用药次数，夜间觉醒次数各基因型组之间均无显著差异。

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