Table 3.

Odds Ratio For Severe Perineal Laceration

Characteristic	Unadjusted OR (95% CI)	Adjusted OR (95% CI)
OP position without rotation	2.79 (1.25–6.23)	3.67 (1.42–9.47)
Age	1.04 (1.01–1.08)	1.02 (0.92–1.14)
Race
Caucasian	ref	ref
African American	0.44 (0.22–0.88)	0.58 (0.12–2.86)
Other	2.71 (1.51–4.89)	3.44 (0.60–19.78)
Insurance
Medicaid	0.27 (0.17–0.41)	0.53 (0.16–1.70)
BMI 30 or more kg/m2	0.84 (0.57–1.23)	1.06 (0.40–2.81)
Gestational age	1.19 (1.06–1.34)	0.98 (0.72–1.35)
Nulliparity	2.49 (1.32–4.70)	6.47 (1.13–37.01)
Episiotomy	2.5 (1.67–3.84)	0.93 (0.33–2.66)
Neonatal weight	1.00 (1.00–1.00)	1.00 (0.99–1.00)

OR, odds ratio; CI, confidence interval; OP, occiput posterior; BMI, body mass index.