Table 4.

Descriptive statistics for co-relative analyses in males

	Siblings		Cousins
	All pairs	Informative	All pairs	Informative
Number of individuals/unique pairs	24 386/12 193	4190/2095	28 730/14 365	5048/2524
Birth year, mean (s.d.)	1970.4 (7.9)	1968.6 (7.2)	1971.8 (7.1)	1970.2 (6.9)
Age at first criminal act, mean (s.d.)	16.5 (1.6)	16.5 (1.6)	16.7 (1.6)	16.6 (1.6)
Number with violent criminal behaviour (%)	7637 (31.3%)	1504 (35.9%)	7939 (27.6%)	1615 (30.6%)
Married before relapse or censoring	5873 (24.1%)	2197 (52.4%)	7708 (26.8%)	2635 (53.2%)
Relapse	9552 (39.2%)	2281 (54.5%)	8953 (31.2%)	2687 (52.2%)