Timing of cesarean and its impact on labor duration and genital tract trauma at the first subsequent vaginal birth: a retrospective cohort study

Table 1 Delivery characteristics

Variable	PVB (Controls)	fVBAC	p-value
Variable	n = 255	n = 255	p-value
Age [years]; mean ± SD	28.6 ± 4.8	31.7 ± 4.0	<.001^a
BMI; mean ± SD	28.5 ± 4.8	29.1 ± 5.1	.215^a
Gestational age [weeks]; mean ± SD	39.8 ± 1.4	39.7 ± 1.3	.107^a
Birthweight [g]; mean ± SD	3260.6 ± 424.9	3295.6 ± 429.8	.369^a
1st stage duration [min]; mean ± SD	347.0 ± 150.5	289.1 ± 128.1	<.001^a
2nd stage duration [min]; mean ± SD	23.8 ± 20.6	20.8 ± 15.7	.146^a
Instrumental delivery; n (%)	10 (3.9)	12.0 (4.7)	.663^b
Estimated blood loss [ml]; mean ± SD	387.3 ± 185.9	391.0 ± 158.8	.039^a
Labor induction; n (%)	34 (13.3)	3 (1.2)	<.001^b
Oxytocin use for labor augmentation; n(%)	111 (43.5)	110 (43.1)	.929^b

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