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