Table 2. Logistic regression models investigating longitudinal risk and protective factors for incident DSH.

INCIDENT DSH (n=3,746)
HIERARCHICAL MULTIVARIATE MODELS
	Model 1		Model 2		Model 3		Model 4
Established risk and protective factors (T1)	OR [95% CI]	p	OR [95% CI]	p	OR [95% CI]	p	OR [95% CI]	p
Grade 7 (referent: grade 9)	.80 [.58, 1.12]	.191	.52 [.37, .74]	<.0001	.52 [.36, .74]	<.0001	.52 [.36, .75]	<.0001
Female Gender (referent: male)	2.15 [1.53, 3.01]	<.0001	2.22 [1.60, 3.06]	<.0001	1.99 [1.39, 2.85]	<.0001	1.93 [1.35, 2.76]	<.0001
Washington State (referent: Victoria)	.62 [.43, .88]	.009	.81 [.54, 1.21]	.299	.67 [.45, 1.01]	.056	.67 [.45, 1.00]	.048
Substance use
Alcohol use classification (referent: no use)
No recent alcohol use			2.49 [1.52, 4.06]	<.0001	1.88 [1.15, 3.09]	.013	1.85 [1.11, 3.08]	.019
Recent alcohol use			4.11 [2.43, 6.97]	<.0001	2.75 [1.60, 4.73]	<.0001	2.70 [1.57, 4.64]	<.0001
Binge drinking			3.27 [1.40, 7.63]	.006	1.72 [.74, 4.02]	.209	1.73 [.73, 4.13]	.213
Current Cannabis Use			1.61 [.84, 3.09]	.148	1.15 [.55, 2.42]	.714	1.14 [.54, 2.39]	.736
Current Tobacco Use			2.52 [1.48, 4.29]	.001	1.61 [.96, 2.68]	.070	1.60 [.95, 2.71]	.079
Individual factors
Emotional Control (P)					.87 [.64, 1.18]	.381	.88 [.65, 1.20]	.421
Bullying victimization					1.03 [.85, 1.23]	.774	1.01 [.84, 1.21]	.925
Antisocial Behavior					2.42 [1.46, 4.01]	.001	2.42 [1.46, 4.00]	.001
Depressive Symptoms					3.40 [2.69, 5.64]	<.0001	3.52 [2.37, 5.21]	<.0001
Impulsivity					1.31 [.93, 1.86]	.124	1.25 [.88, 1.79]	.211
Family factors
Family Conflict							1.16 [.90, 1.44]	.1161
Parent Overcontrol							1.11 [.90, 1.37]	.318
Poor Family Management							.95 [.65, 1.38]	.784

Note. OR = odds ratio, CI = confidence interval.

DSH = deliberate self-harm, (P) Protective factor

Grade 7 (coded 0 = grade 7, 1 = grade 9 [50.23%]), Female gender (coded 0 = male, 1 = female [50.95%]), Washington State (coded 0 = Victoria, 1 = Washington State [49.90%])