[Posted as supplied by author]

Table A ICD codes used to define cases of schizophrenia or non-affective, non-schizophrenic psychoses in index subjects and first-degree relatives

Case category

ICD-10

ICD-9

(Swedish version)

ICD-8

ICD-7

Schizophrenia

F20

295A, 295B, 295C, 295D, 295E, 295G; 295W, 295X

295.0, 295.1, 295.2, 295.3, 295.4, 295.6, 295.8, 295.99

300.0, 300.1, 300.2,300.3, 300.4, 300.7

Non-affective, non-schizophrenic psychoses

F21-F29

295F, 295H; 297; 298

295.5, 295.7, 297, 298

300.5, 300.6; 303

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[Posted as supplied by author]

Table B Hazard Ratios (with 95% confidence intervals) of schizophrenia for maternal age groups

Schizophrenia (639 cases)
Maternal age groups	Cases (n)	Crude Association	Controlled for paternal age, sex and age
<20 yrs.	36	1.29 ( 0.90 to 1.85 )	1.34 ( 0.89 to 2.02 )
20 � 24 yrs.	170	1.00	1.00
25 � 29 yrs.	212	0.89 ( 0.73 to 1.09 )	0.75 ( 0.60 to 0.95 )
30 � 34 yrs.	162	1.25 ( 1.01 to 1.55 )	0.85 ( 0.64 to 1.14 )
35 � 39 yrs.	48	1.32 ( 0.96 to 1.82 )	0.76 ( 0.50 to 1.15 )
>=40 yrs.	11	1.79 ( 0.97 to 3.30 )	0.94 ( 0.47 to 1.90 )
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Change in hazard ratio per 10-year increase in maternal age.		1.21 ( 1.02 to 1.43 )	0.83 ( 0.64 to 1.07 )