Table 4.

Class Validation.

	Total (N=326)	Range	1 (n=8)	2 (n=67)	3 (n=12)	4 (n=231)	Statistical Testing	Group Differences
Suicide-related factors
Acquired capability	1.96 (1.02)	0.00-4.00	3.19 (0.66)	2.11 (1.10)	1.72 (0.54)	1.87 (0.98)	F3.326 = 5.14, p < 0.01	2 > 1, 2, 3
History of suicide attempts	53 (16.3%)	-	3 (37.5%)	20 (29.9%)	2 (16.7%)	28 (11.7%)	χ23,N=326 = 15.37, p < 0.01	2 > 4
Behavioral health factors
Impulsivity
Negative urgency	2.41 (0.59)	1.25-3.92	2.58 (0.75)	2.82 (0.50)	2.29 (0.66)	2.26 (0.54)	F3,226 = 15.26, p < 0.001	2 > 3, 4
Positive urgency	1.94 (0.69)	1.00-4.00	2.41 (0.77)	2.24 (0.71)	2.07 (0.92)	1.80 (0.62)	F3,226 = 7.65, p < 0.001	2 > 4
Lack of premeditation	1.94 (0.48)	1.00-3.82	2.26 (0.45)	2.10 (0.53)	1.73 (0.53)	1.88 (0.43)	F3,226 = 5.01, p < 0.01	2 > 4
Lack of perseverance	1.96 (0.51)	1.00-3.70	2.08 (0.50)	2.32 (0.52)	1.88 (0.34)	1.82 (0.45)	F3,226 = 15.98, p < 0.001	2 > 4
Sensation seeking	2.87 (0.65)	1.08-4.00	3.49 (0.35)	2.87 (0.60)	2.60 (0.73)	2.86 (0.66)	F3,226 = 3.03, p < 0.05	1 > 3, 4
Problematic alcohol use	0.69 (0.60)	0.00-2.80	0.91 (0.61)	0.83 (0.79)	0.71 (0.77)	0.62 (0.49)	F3,229 = 2.04, p = 0.11	n.s.
Disordered eating	1.87 (1.49)	0.00-5.65	2.25 (1.30)	2.46 (1.74)	2.07 (1.27)	1.63 (1.35)	F3,226 = 4.82, p < 0.01	2 > 4

Note: N=326. All total and class values represent M(SD).