Baseline characteristics for randomized versus non-randomized participants.

Data are presented as number (percent) unless otherwise indicated.aPercents given are related to available data per characteristic and may differ from the total number of patients.bPercents given as part of known educational level.cOutcome characteristic with more than 5% missing data. Education: data available for 425 women (58%); body mass index at booking: data available for 616 women (83%); body mass index at start study available for 346 women (47%); maternal temperature at inclusion: data available for 689 women (93%).除另有说明外，数据以例数（百分比）形式呈现。 a 所给出的百分比基于各特征的有效数据计算所得，可能与患者总例数存在差异。 b 所给出的百分比以已知受教育程度人群为基数计算。 c 该结局特征存在超过5%的数据缺失。 受教育程度：425名女性有有效数据（占比58%）；建档时体重指数（body mass index, BMI）：616名女性有有效数据（占比83%）；研究启动时体重指数：346名女性有有效数据（占比47%）；入组时产妇体温：689名女性有有效数据（占比93%）。