Maternal and obstetric characteristics of 819 women with negative inflammatory indices and negative vaginal swab for beta-hemolytic streptococcus (LR-group) and 65 with positive inflammatory indices and/or positive vaginal swab for beta-hemolytic streptococcus (HR-group).

(Data are reported as number of cases and percentage in brackets, or mean and standard deviation, where appropriate).数据以例数及括号内标注的百分比形式报告，适当时也可采用均值（mean）与标准差（standard deviation）的形式呈现。