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Table 4 The effect of maternal body mass index on the duration of labor** based on Cox model

From: The effectiveness of a Pilates exercise program during pregnancy on childbirth outcomes: a randomised controlled clinical trial

Variable Beta Std. Error 95% Confidence Interval Hazard Ratio z P-value*
Lower Bound Upper Bound
BMI .287 .082 .126 .448 1.33 3.50 <.001
  1. *The duration of labor considering the maternal body mass index was analyzed by using Cox regression analysis; **the sum of the duration of the active phase and the second stage of labor