Table 2.

Pearson correlations between selected characteristics and singleton CD rate

	Singleton CD rate	Patient age	Total deliveries, n	Singleton operative vaginal delivery rate	Forceps rate	Vacuum rate	Blood transfusion rate	Hospital length of stay	Cost per patient	Years since graduation	Specialty (MFM)	Proportion of high-risk deliveries
Singleton CD rate	1	0.30^b	−0.39^b	−0.24^b	−0.30^b	−0.04	0.13	0.45^b	0.41^b	0.30^b	0.34^b	0.50^b
Patient age		1	−0.28^b	−0.09	0.03	−0.03	0.11	0.07	0.09	−0.16^a	−0.03	0.57^b
Total deliveries, n			1	−0.02	0.40^b	0.05	−0.21^b	−0.24^b	−0.26^b	0.07	−0.13	−0.29^b
Singleton operative vaginal delivery rate				1	0.61^b	0.50^b	0.10	0.01	0.03	−0.02	−0.06	−0.05
Forceps rate					1	−0.04	−0.07	−0.17^a	−0.14	0.07	−0.13	−0.12
Vacuum rate						1	0.09	0.17^a	0.12	0.01	−0.03	−0.07
Blood transfusion rate							1	0.19^a	0.33^b	0.10	0.16^a	0.17^a
Hospital length of stay								1	0.79^b	0.21^b	0.38^b	0.27^b
Cost per patient									1	0.20^b	0.38^b	0.37^b
Years since graduation										1	0.31^b	0.10
Specialty (MFM)											1	0.34^b
Proportion of high-risk deliveries												1

^aCorrelation is significant at the 0.05 level (2-tailed)

^bCorrelation is significant at the 0.01 level (2-tailed)