Table 1.

Maternal, fetal, and obstetric characteristics of vaginal breech deliveries and non-urgent cesarean sections at 32 + 0—36 + 6 gestational weeks 2004–2017 in Finland

	Vaginal breech labor n / % 535 / 100%	Non-urgent cesarean section n / % 227 / 100%	P-value	Crude OR	95% confidence interval
Maternal age < 25y	8 / 1.5%	2 / 0.9%	0,712	1.71	0.36—8.11
Maternal age ≥ 35y	116 / 21.7%	53 / 23.3%	0,712	0.91	0.63- 1.32
Nulliparous	287 / 57.7%	132 / 58.1%	0,253	0.83	0.61—1.14
Multipara ≥ 3 deliveries	41 / 7.7%	17 / 7.5%	0,934	1.03	0.57—1.85
Maternal smoking	76 / 14.2%	36 / 15.9%	0,556	0.88	0.57—1.35
Maternal BMI ≥ 30	25 / 4.7%	15 / 6.6%	0,273	0.69	0.36—1.34
History of induced abortion	69 / 12.9%	22 / 9.7%	0,212	1.38	0.83—2.29
History of miscarriage	114 / 21.3%	60 / 26.4%	0,123	0.75	0.53—1.08
History of cesarean section	30 / 5.6%	56 / 24.7%	< 0,001	0.18	0.11—0.29
Assisted reproduction technology	19 / 3.6%	17 / 7.5%	0,019	0.45	0.23—0.89
Diabetes mellitus type I	2 / 0.4%	32 / 14.1%	< 0,001	0.02	0.01- 0.10
Diabetes mellitus type II	2 / 0.4%	1 / 0.4%	0,893	0.85	0.08—9.40
Gestational diabetes mellitus	53 / 9.9%	15 / 6.6%	0,144	1.55	0.86—2.82
Oligohydramnios	5 / 0,9%	14 / 6.2%	< 0,001	0.14	0.05—0.40
Preeclampsia / pregnancy-induced high blood pressure	12 / 2.2%	46 / 20.3%	< 0,001	0.09	0.05—0.17
PPROM	132 / 24.7%	39 / 17.2%	0,023	1.58	1.06—2.35
Birth weight < 10th percentile	22 / 7.6%	42 / 18.5%	< 0,001	0.19	0.11—0.32
Birth weight > 90th percentile	6 / 1.1%	13 / 5.7%	< 0,001	0.19	0.07—0.50
Epidural analgesia	221 / 41.3%	0 / 0%	< 0,001
Administration of antenatal corticosteroids	88 / 16.4%	106 / 46.7%	< 0,001	0.22	0.16—0.32
Neonatal female sex	264 / 49.3%	124 / 54.6%	0,182	0.81	0.59—1.10

OR Odds Ratio, BMI Body Mass Index, PPROM Preterm Premature Rupture Of Membranes