Table A1.

H² of psychiatric diagnoses based on ICD 8, 9, and 10 in adults of >19 years

	Frequencies
	Full siblings			Maternal half-siblings			Tetrachoric correlation
	Cases	Controls	Prevalence (%)	Cases	Controls	Prevalence (%)	Full sibs	Maternal half-sibs	h2
Alcohol dependence	87 773	3 043 417	2.80	10 589	157 287	6.31	0.253 (0.004)	0.142 (0.012)	0.444 (0.052)
Anorexia nervosa	8067	3 123 123	0.26	657	167 219	0.39	0.207 (0.020)	0.120 (0.076)	0.349 (0.316)
Attention deficit hyperactivity disorder	5003	209 959	2.33	895	8927	9.11	0.445 (0.014)	0.175 (0.040)	0.852 (0.171)
Autism spectrum disorder	2430	212 532	1.13	237	9585	2.41	0.388 (0.022)	0.055 (0.098)	0.665 (0.402)
Bipolar disorder	18 655	3 112 535	0.60	1619	166 257	0.96	0.303 (0.009)	0.167 (0.038)	0.543 (0.158)
Major depressive disorder	121 015	3 010 175	3.86	12 377	155 499	7.37	0.194 (0.004)	0.117 (0.011)	0.307 (0.048)
Obsessive compulsive disorder	11 553	3 119 637	0.37	1003	166 873	0.60	0.228 (0.014)	0.167 (0.048)	0.244 (0.198)
Schizophrenia	15 178	3 116 012	0.48	1106	166 770	0.66	0.330 (0.010)	0.050 (0.058)	0.569 (0.049)

Note. Standard errors are presented in parentheses.

Sex and age was regressed out from all disorders.

For ADHD and Autism, birth year was limited to 1990 or higher.

Youngest sibling born at age 20 or later.