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. Author manuscript; available in PMC: 2014 Jun 1.
Published in final edited form as: Am J Obstet Gynecol. 2013 Mar 1;208(6):460.e1–460.e6. doi: 10.1016/j.ajog.2013.02.050

Table 2.

Baseline demographic information

Mid Pelvis Circumference ≤10th (n=47) Mid Pelvis Circumference >10th (n=379) p
Maternal Age (yrs) 23.2 ± 5.2 23.9 ± 6.1 0.22
Gravidity 1.6 ± 0.7 1.6 ± 0.9 0.43
Race <0.01
 White 3 (6.4%) 107 (28.2%)
 Black 39 (83.0%) 219 (57.8%)
 Hispanic 0 18 (4.8%)
 Asian 3 (6.4%) 12 (3.2%)
Labor Type 0.16
 Spontaneous 7 (15.9%) 110 (29.3%)
 Induced 12 (27.3%) 79 (21.1%)
 Augmented 25 (56.8%) 186 (49.6%)
Prior Cesarean 11 (23.4%) 49 (12.9%) .08
Prior Vaginal Delivery 0 4 (1.1%) 0.45
Birth weight (g)* 3445 (3172–3681) 3354 (3090–3650) 0.19

Birth weight data presented as median (25th–75th percentile)