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Table 1 Maternal and labor/birth characteristics by mode of birth (N = 5095)

From: Disparities by race/ethnicity in unplanned cesarean birth among healthy nulliparas: a secondary analysis of the nuMoM2b dataset

 

Total

Vaginal Birth

Unplanned Cesarean Birth

P-valuea

nb

5095

4094 (80.4)

1001 (19.6)

 

Maternal/Pregnancy Characteristics

Presenting Race/Ethnicity

   

 < 0.001

 Black-presenting

804 (15.8)

610 (14.9)

194 (19.4)

 

 Hispanic-presenting

868 (17.0)

653 (16.0)

215 (21.5)

 

 White-presenting

3423 (67.2)

2831 (69.1)

592 (59.1)

 

BMI at Labor Admission (kg/m2) n (%)

   

 < 0.001

  < 25 kg/m2

544 (10.9)

504 (12.6)

40 (4.1)

 

 25–29.99 kg/m2

1947 (39.1)

1690 (42.2)

257 (26.3)

 

 30–34.99 kg/m2

1379 (27.7)

1088 (27.2)

291 (29.8)

 

 35–39.99 kg/m2

648 (13.0)

447 (11.2)

201 (20.6)

 

  >  = 40 kg/m2

462 (9.3)

274 (6.8)

188 (19.2)

 

BMI at Labor Admission (kg/m2), continuous [IQR]

29.99 [27.01, 34.31]

29.40 [26.59, 33.29]

33.37 [29.19, 38.55]

 < 0.001

Gestational Age at Labor Admission, by week, n (%)

   

 < 0.001

37–37.6 weeks

375 (7.4)

311 (7.6)

64 (6.4)

 

38–38.6 weeks

774 (15.2)

662 (16.2)

112 (11.2)

 

39–39.6 weeks

1570 (30.8)

1311 (32.0)

259 (25.9)

 

40–40.6 weeks

1600 (31.4)

1273 (31.1)

327 (32.7)

 

41–41.6 weeks

733 (14.4)

509 (12.4)

224 (22.4)

 

42 weeks and beyond

43 (0.8)

28 (0.7)

15 (1.5)

 

Gestational Age at Labor Admission, median [IQR]

39.60 [39.00, 40.40]

39.50 [39.00, 40.30]

40.10 [39.20, 40.60]

 < 0.001

Maternal Age, median [IQR]

27.00 [22.00, 31.00]

27.00 [22.00, 30.00]

28.00 [24.00, 32.00]

 < 0.001

Hypertensive Disorder of Pregnancy, n (%)

1154 (22.7)

841 (20.6)

313 (31.3)

 < 0.001

Gestational Diabetes, n (%)

177 (3.5)

124 (3.0)

53 (5.3)

0.001

Labor/Birth Characteristics

Mode of Labor Onset, n (%)

   

 < 0.001

 not augmented

913 (17.9)

843 (20.6)

70 (7.0)

 

 augmented

2390 (46.9)

1992 (48.7)

398 (39.8)

 

 induced

1790 (35.1)

1257 (30.7)

533 (53.2)

 

Postpartum Characteristics

Postpartum Maternal Morbidityc, n (%)

306 (6.0)

187 (4.6)

119 (11.9)

 < 0.001

  1. Abbreviations: BMI Body mass index, n number, IQR Interquartile range, SD Standard deviation, L&D Labor and delivery unit, NICU Neonatal intensive care unit
  2. aP-values for mode of birth obtained for continuous data using Mann–Whitney U test (Kolmogorov–Smirnov test for non-normal distributions). Likelihood ration tests performed for categorical-level data comparisons by mode of birth
  3. bMissing values for the following variables: maternal BMI at labor admission (115), hypertensive disorder in pregnancy or postpartum (8), mode of labor onset (2)
  4. cPostpartum maternal morbidity event includes occurrence of any of the following: hemorrhage (postpartum hemorrhage requiring transfusion, severe postpartum anemia, or hysterectomy), abnormal coagulation event (postpartum pulmonary embolus or deep vein thrombosis), cardiovascular /cardio- myopathy (postpartum cardiomyopathy or cerebral vascular accident), infection (postpartum endometritis, wound infection or dehiscence, pyleonephritis, urinary tract infection, maternal sepsis, or any other maternal postpartum infections within the first 14 postpartum days), hospital readmission in first 14 days postpartum and/or obstetric anal sphincter injury (OASI), defined as experiencing a 3rd or 4th degree perineal laceration
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BMC Pregnancy and Childbirth

ISSN: 1471-2393

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