Table 2.

TGCS Results Across 12 Sites (N=228,438)

	Site	A	B	C	D	E	F	G	H	I	J	K	L
	Births (n)	20,779	50,320	12,637	6,420	7,877	20,329	14,667	27,869	7,749	23,141	18,392	18,258
	Cesarean Births (%)	20.5	22.0	23.6	24.2	25.4	28.8	28.8	31.6	34.6	34.9	35.0	44.3
Group 1 ≥37wks Nulliparous Singleton Cephalic Spontaneous Labor	Group Sizea (%)	21.1	20.6	21.1	12.1	23.6	23.0	17.5	18.9	19.5	13.0	12.4	6.5
	Cesarean Rateb (%)	15.0	15.8	13.0	12.2	17.1	17.5	18.4	20.3	22.0	16.0	18.0	27.5
	Contribution to overall ratec (%)	3.2	3.3	2.3	1.5	4.0	4.0	3.2	3.8	4.3	2.1	2.2	1.8
2a ≥37wks Nulliparous Singleton Cephalic Induced Labor	Group Size (%)	9.2	10.0	10.1	18.5	8.6	10.3	14.7	14.7	11.9	16.8	27.0	23.5
	Cesarean Rate (%)	34.8	20.2	28.4	25.5	32.1	34.9	36.5	36.0	40.2	33.2	29.2	42.1
	Contribution to overall rate (%)	3.2	2.0	2.9	4.7	2.8	3.6	5.4	5.3	4.8	5.6	7.8	9.9
2b ≥37wks Nulliparous Singleton Cephalic Prelabor Cesarean	Group Size (%)	1.0	0.1	0.4	0.5	0.9	1.0	2.0	1.0	1.3	2.0	3.7	1.9
	Cesarean Rate (%)	100	100	100	100	100	100	100	100	100	100	100	100
	Contribution to overall rate (%)	1.0	0.1	0.4	0.5	0.9	1.0	2.0	1.0	1.3	2.0	3.7	1.9
3 ≥37wks Multiparous Singleton Cephalic Spontaneous Labor	Group Size (%)	39.0	25.3	26.5	19.9	31.0	27.4	23.0	22.1	23.0	17.1	15.3	13.8
	Cesarean Rate (%)	2.4	3.6	2.5	3.8	3.9	3.3	3.8	7.2	4.2	3.7	3.2	7.3
	Contribution to overall rate (%)	0.9	0.9	0.7	0.8	1.2	0.9	0.9	1.6	1.0	0.6	0.5	1.0
4a ≥37wks Multiparous Singleton Cephalic Induced Labor	Group Size (%)	9.3	21.0	9.9	17.6	10.2	9.4	18.1	14.0	12.3	15.4	15.3	17.7
	Cesarean Rate (%)	7.8	2.7	10.0	5.6	4.0	7.8	5.9	9.2	7.5	7.3	6.1	16.5
	Contribution to overall rate (%)	0.7	0.6	1.0	1.0	0.4	0.7	1.0	1.3	0.9	1.1	0.9	2.9
4b ≥37wks Multiparous Singleton Cephalic Prelabor Cesarean	Group Size (%)	0.6	0.1	0.5	0.4	0.9	0.8	1.0	0.8	0.6	1.3	0.8	0.9
	Cesarean Rate (%)	100	100	100	100	100	100	100	100	100	100	100	100
	Contribution to overall rate (%)	0.6	0.1	0.5	0.4	0.9	0.8	1.0	0.8	0.6	1.3	0.8	0.9
5 ≥ 37wks Multiparous Singleton Cephalic w/previous Uterine scar	Group Size (%)	9.4	11.0	10.3	11.5	11.2	11.4	11.1	11.3	13.3	11.7	12.2	14.1
	Cesarean Rate (%)	62.0	80.5	62.4	68.7	78.3	78.9	89.2	81.6	84.8	88.9	85.9	97.4
	Contribution to overall rate (%)	5.9	8.8	6.4	7.9	8.8	9.0	9.9	9.2	11.3	10.4	10.5	13.7
6 All Nulliparous Singleton Breech	Group Size (%)	1.1	1.4	1.6	1.0	0.0	1.9	0.3	1.6	1.7	1.2	2.4	1.7
	Cesarean Rate (%)	96.9	94.8	87.0	98.4	0.0	99.7	84.8	94.0	94.6	98.6	100	95.0
	Contribution to overall rate (%)	1.1	1.3	1.4	1.0	0.0	1.9	0.3	1.5	1.6	1.2	2.4	1.7
7 All Multiparous Single Breech incl. w/previous Uterine scar	Group Size (%)	1.4	1.5	2.5	1.3	0.0	1.7	0.3	1.8	1.6	1.6	1.0	2.3
	Cesarean Rate (%)	89.8	93.2	91.0	96.3	0.0	100	88.0	92.6	90.1	95.0	98.3	91.5
	Contribution to overall rate (%)	1.2	1.4	2.3	1.2	0.0	1.7	0.3	1.7	1.4	1.5	1.0	2.1
8 All Multiple including w/ previous Uterine scars	Group Size (%)	0.9	1.9	2.5	2.1	1.7	3.2	2.2	2.3	2.0	2.8	2.9	2.2
	Cesarean Rate (%)	61.1	66.4	47.0	59.3	59.6	63.2	63.0	68.3	78.4	73.9	77.8	81.2
	Contribution to overall rate (%)	0.5	1.3	1.2	1.3	1.0	2.0	1.4	1.6	1.6	2.0	2.3	1.8
9 All Singleton Transverse or oblique incl. w/ previous Uterine scars	Group Size (%)	0.0	0.1	0.4	0.1	0.0	0.0	0.0	0.0	0.4	0.2	0.0	0.4
	Cesarean Rate (%)	0.0	94.4	93.3	100	0.0	0.0	0.0	0.0	100	98.2	0.0	98.6
	Contribution to overall rate (%)	0.0	0.1	0.3	0.1	0.0	0.0	0.0	0.0	0.4	0.2	0.0	0.4
10 <37wks Singleton Cephalic Incl. w/ previous Uterine scars	Group Size (%)	5.7	7.9	14.1	15.0	9.4	9.7	9.6	10.4	12.7	16.4	7.1	13.0
	Cesarean Rate (%)	34.2	28.6	26.6	26.1	30.4	29.6	35.1	32.4	44.0	40.5	40.5	44.0
	Contribution to overall rate (%)	1.9	2.3	3.7	4.0	2.9	2.9	3.4	3.4	5.6	6.7	2.9	5.7

^*These totals and percentages come from the data in the table.

^aGroup size (%) = n of women in the group / total N women delivered in the hospital x 100

^bGroup CS rate (%) = n of CS in the group / total N of women in the group x 100

^cRelative contribution (%) = n of CS in the group / total N of CS in the hospital x 100¹¹