Table 4. Hierarchical logistic regression analyses results of participants with intentional suicide attempts,^a with SSA as the dependent variable (N = 413^b).

Independent variables		Model 1			Model 2			Model 3			Model 4
		B	Wald	OR	B	Wald	OR	B	Wald	OR	B	Wald	OR
Demographics and historical factors
	Age, yr	0.03	12.18	1.03***	0.02	3.56	1.02	0.02	2.72	1.02	0.02	2.82	1.02
	Sex (female)	−0.55	4.83	0.58*	−0.42	2.24	0.66	−0.37	1.60	0.69	−0.39	1.78	0.68
	Previous suicide attempts (yes)	−0.34	1.90	0.71	−0.42	2.10	0.66	−0.50	2.85	0.61	−0.51	2.88	0.60
	Psychiatric treatment (yes)	−0.41	1.67	0.66	−0.49	1.76	0.62	−0.42	1.23	0.66	−0.40	1.10	0.67
	Psychiatric hospitalizations (yes)	0.03	0.01	1.03	0.10	0.13	1.11	0.15	0.28	1.17	0.16	0.30	1.17
Characteristics of self-injury
	Cutting (yes)				−1.88	33.67	0.15***	−1.79	29.28	0.17***	−1.75	27.69	0.17***
	Lethality of injury (higher)				1.75	30.62	5.78***	1.79	30.13	5.98***	1.79	29.58	6.01***
Status at the time of self-injury
	Planned (yes)							0.80	2.96	2.22	0.71	2.33	2.04
	Alcohol (yes)							0.56	4.11	1.75*	0.57	4.18	1.76*
	Suicide note (yes)							0.79	2.74	2.20	0.80	2.78	2.22
	Seeking help (yes)							−0.73	8.14	0.48**	−0.74	8.37	0.48**
Current suicidal ideation and plans
	Sustained suicidal ideation (yes)										−0.07	0.05	0.93
	Future suicidal plans (yes)										0.31	1.07	1.36
Statistics of the model
	-2LL	514.304			415.113			397.343			396.163
	Model χ2	42.246 (df = 5)***			141.437 (df = 7)***			159.207 (df = 11)***			160.387 (df = 13)***
	Step χ2	42.246 (df = 5)***			99.191 (df = 2)***			17.770 (df = 4)**			1.180 (df = 2)
	Nagelkerke R2	0.131			0.392			0.432			0.435
	Classification accuracy	63.2			77.5			77.5			77.2

SSA = serious intent suicide attempt, OR = odds ratio.

^*P < 0.05, ^**P < 0.01, ^***P < 0.001.

^aIntentional suicide attempts included minor intent suicide attempts and SSA.

^bCases with missing values for any independent variable were excluded from the analysis.