Table 1.

Descriptive statistics (study 1)

Variable	Categories	Overall n	Missing values	%/mean (SD)
Violence		1,563	—
	Violent			54.4
	Nonviolent			45.6
Ideology		1,563	—
	Islamist			17.6
	Left-wing			23.4
	Right-wing			59
Education		595	968
	Up to high school			39.7
	College or vocational education (some or complete degree)			47.7
	Postgraduate education (some or complete degree)			12.6
Marital status		909	654
	Yes			35.9
	No			64.1
Immigration background		1,500	63
	Yes			8.1
	No			91.9
Military experience		1,033	530
	Yes			16.8
	No			83.2
Sex		1,558	—
	Male			89.1
	Female			10.9
Age		1,507	56	34.62 (13.55)
Ethnicity (white)		1,434	124
	Yes			76.1
	No			23.9
Previous violent criminal experience		919	644
	Yes			22.3
	No			77.7
Decades		1,563	—
	1940s–1960s			7.1
	1970s			8.1
	1980s			9.2
	1990s			15
	2000s			24.4
	2010s			36.2