Table 4.

Hierarchical Logistic Regression testing interaction effects of BPD features and focusing on prior incidence of self-harm.

	R2	Odds ratio	95% CI
	$R_a^2-R_b^2$		Lower–Upper
Step 1	0.21–0.29
BPD		3.85**	2.72–5.45
Focusing		1.35*	1.03–1.75
Step 2	0.25–0.34
BPD		4.21**	2.86–6.20
Focusing		1.18	0.89–1.58
BPD X Focusing interaction		2.01**	1.40–2.88

Note: $R_a^2$ = Cox and Snell, $R_b^2$ = Nagelkerke, * p < 0.05; ** p < 0.001.