. 2019 Aug 28;50(11):1914–1922. doi: 10.1017/S0033291719002046

Table 2.

Frequency of obstetric complications

	HC		BIP		SCZ		HC v. BIP		HC v. SCZ		BIP v. SCZ
	N = 622		N = 263		N = 607		χ²	p	χ²	p	χ²	p
	N	%	N	%	N	%
Obstetric complications	166	0.27	85	0.32	170	0.28	2.89	0.089	0.27	0.604	1.65	0.199
Asphyxia	83	0.50	45	0.53	87	0.51	0.20	0.659	0.05	0.829	0.07	0.790
Discolored placenta/amniotic fluid	71	0.43	37	0.44	67	0.39	0.01	0.909	0.39	0.531	0.40	0.528
Emergency C-section	10	0.06	4	0.05	14	0.08	0.19	0.667	0.62	0.431	1.08	0.300
Preterm ⩽35 weeks	13	0.08	8	0.09	28	0.16	0.18	0.669	5.85	0.016	2.33	0.127
Low Apgar score	5	0.03	3	0.04	12	0.07	0.05	0.825	2.86	0.091	1.28	0.259
Bleeding during labor	33	0.20	12	0.14	19	0.11	1.27	0.260	4.86	0.027	0.46	0.498
Bleeding before 28 weeks	8	0.05	3	0.04	16	0.09	0.22	0.637	2.67	0.102	2.84	0.092
Low birth weight ⩽2000 g	4	0.02	4	0.05	15	0.09	0.96	0.327	6.48	0.011	1.39	0.238
Other birth complications	11	0.07	7	0.08	21	0.12	0.22	0.640	3.20	0.074	0.98	0.321

HC, healthy controls; BIP, bipolar spectrum; SCZ, schizophrenia spectrum. Bold numbers represent significant values.