Risk of failure of the first course of ibuprofen.

GA: gestational age; AGC: antenatal glucocorticoids (defined by at least one complete course of two doses at an interval of 24 hours); PROM: premature rupture of membranes (>24 hours).SD: standard deviation; OR: odds ratio; CI: confidence interval.Risk of failure of the first course of ibuprofen.GA：胎龄（gestational age）；AGC：产前糖皮质激素（antenatal glucocorticoids，定义为至少完成一个间隔24小时的两剂完整疗程）；PROM：胎膜早破（premature rupture of membranes，指破膜时长＞24小时）。SD：标准差（standard deviation）；OR：比值比（odds ratio）；CI：置信区间（confidence interval）。首个疗程布洛芬治疗失败的风险。