Nationwide population-based cohort study of adverse obstetric outcomes in pregnancies with myoma or following myomectomy: retrospective cohort study

Table 1 Demographics and birth outcomes of study population (Dataset 1)

	Group A^a (N = 740,675)	Group B^a (N = 38,402)	Group C^a (N = 9890)	p-value
Age	31.62 ± 3.96	33.87 ± 3.50	34.63 ± 3.42	<.0001
Nulliparity	385,663 (52.07)	19,541 (50.89)	5380 (54.40)	<.0001
Multiple pregnancy	12,495 (1.69)	1074 (2.80)	432 (4.37)	<.0001
Cesarean section	286,946 (38.74)	17,547 (45.69)	8447 (85.41)	<.0001
Preeclampsia	16,033 (2.16)	1063 (2.77)	327 (3.31)	<.0001
PPH	72,501 (9.79)	3946 (10.28)	1007 (10.18)	0.0035
Placental abruption	2728 (0.37)	170 (0.44)	40 (0.40)	0.0572
Placenta previa	9365 (1.26)	848 (2.21)	289 (2.92)	<.0001
Uterine rupture	107 (0.01)	12 (0.03)	22 (0.22)	<.0001

^aGroup A, Women who had never been diagnosed with myoma; Group B, Women who had diagnosed myoma(s) but no history of myomectomy; Group C, Women who had a history of myomectomy
PPH Postpartum hemorrhage
Values are given as mean ± standard deviation or number (%)

ISSN: 1471-2393