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Table 1 Obese women demonstrate abnormally slow cervical dilation in first stage labor

From: Parturition dysfunction in obesity: time to target the pathobiology

Number previous vaginal births Study BMI <25.0 BMI 25.0-29.9 BMI 30.0-34.9 BMI 35.0-39.9 BMI ≥40 p value
Zero Kominiarek et al., 2011 [19]       
 Median 5.4 hrs 5.7 hrs 6.0 hrs 6.7 hrs 7.7 hrs <0.0001
 (95 % ile) (18.2 hrs) (18.8 hrs) (19.9 hrs) (22.2 hrs) (25.6 hrs)
Norman et al., 2012 [20]      
 Median 4.6 hrs 5.0 hrs 5.5 hrs 6.7 hrs <0.01
 (95 % ile) (14.4 hrs) (15.7 hrs) (17.3 hrs) (21.2 hrs)
One Kominiarek et al., 2011 [19]       
 Median 4.6 hrs 4.5 hrs 4.7 hrs 5.0 hrs 5.4 hrs <0.0001
 (95 % ile) (17.5 hrs) (17.4 hrs) (17.9 hrs) (19.0 hrs) (20.6 hrs)
Norman et al., 2012 [20]      
 Median 3.3 hrs 3.9 hrs 4.3 hrs 5.0 hrs <0.01
 (95 % ile) (12.6 hrs) (15.1 hrs) (16.5 hrs) (19.2 hrs)
  1. Adjusted duration of labor from 4–10 centimeters cervical dilation by BMI at the time of delivery. Data are median and 95%ile hours in labor
  2. Kominiarek’s median duration adjusted for age, height, race, gestational age, diabetes, induction, augmentation, epidural (first stage), operative vaginal delivery, and birthweight (N = 118,978)
  3. Norman’s median duration adjusted for induction, race, birth weight > 4,000 g (N = 5,204)