Table 2.

Numbers of Cases With and Without Schizophrenia (N), Relative Risk (RR), and 95% CI by Type of Schizophrenia and Risk Factors for Schizophrenia

			No Schizophrenia	Catatonic Schizophrenia	Other Schizophrenia	P (Difference Between 2 Types of Schizophrenia)
Total N			89 500	43	525
Sex	Male	N	46 388	21	337	.03
		RR		.90	1.70
		CI		0.50, 1.64	1.42, 2.03
		P		.73	<.0001
	Female	N	43 680	22	188
		RR		1	1
		CI		—	—
		P		—	—
Paternal age	35+	N	26 285	18	200	.59
		RR		1.09	1.27
		CI		0.46, 2.58	1.03, 1.56
		P		.85	.03
	<35	N	63 783	25	325
		RR		1	1
		CI		—	—
		P		—	—
Maternal age	35+	N	12 213	12	98	.13
		RR		2.14	1.15
		CI		0.83, 5.54	0.89,1.49
		P		.12	.29
	<35	N	77 855	31	427
		RR		1	1
		CI		—	—
		P		—	—
Parental history of schizophrenia
	Present	N	1 514	7	51	.14
		RR		10.88	6.09
		CI		4.84, 24.46	4.56, 8.12
		P		<.0001	<.0001
	Absent	N	88 554	36	474
		RR		1	1
		CI		—	—
		P		—	—