Characteristic	Degrees of Freedom	Test Statistic	Cramer’s V Test of Correlation with Mode of Birth
Onset of Labor	2	70.0	0.3
Transferred During Labor	1	20.3	0.1
If Transferred, Transferring Facility (Transferred n = 481)	2	0.02	0.007
Cervical Exam on Admission	-	Z = 2.73	0.2
Fetal Heart Rate Auscultated at Admission	2	0.9	0.03
Duration of Labor	3	94.3	0.3
Partograph Used	3	162.4	0.4
Number of Vaginal Exams	-	Z = 4.5	0.4
Antepartum Hemorrhage	1	6.0	0.08
Chorioamnionitis	1	0.3	0.02
Antepartum Pre-eclampsia/Eclampsia/Chronic Hypertension	1	0.5	0.02
Anesthesia for Birth	1	632.8	0.8
Delivery Provider	3	874.3	0.9
Gestational Age at Delivery	-	Z = −2.3	0.1
Birthweight (grams)	-	Z = −3.1	0.3
Neonatal Sex	1	1.6	−0.04
Multiple Gestation	1	5.4	0.07

^a: Fisher’s Exact test;

^b: Chi-squared test;

^c: Mann-Whitney U test