Table 6. Multiple regression model parameters for the predictive validity of the STRAIN with participant’s depressive symptom levels.

	Current Depressive Symptom Levels
Model	ADS-L					PHQ-D
	Adj. R2	Δ R2	SE	F	p	Adj. R2	Δ R2	SE	F	p
Covariates	.14		9.73	12.72	< .001	.16		4.82	14.54	< .001
Covariates + STRAIN Lifetime Stressor Count	.18	.046	9.48	14.05	< .001	.23	.080	4.59	18.95	< .001
Covariates	.14		9.73	12.72	< .001	.16		4.82	14.54	< .001
Covariates + Lifetime Stressor Severity	.20	.064	9.38	15.74	< .001	.25	.096	4.54	20.55	< .001

Covariates: age, sex, self-reported mental health disorder and self-reported intake of psychotropic drugs.

ADS-L = Center for Epidemiological Studies Depression Scale; PHQ-D = Brief Patient Health Questionnaire; SE = Standard Residual Error.