Table 4. Comparison of screening tools with the PRIME-MD major depression.

		BDI	HADS
	BCD	(score ⩾19)	(score ⩾11)
Base rate of screening positive	34%	19%	14%
Kappa	0.34	0.44	0.49
% agreement	73%	82%	85%
Sensitivity	67%	52%	48%
Specificity	75%	90%	95%
Positive predictive value	41%	58%	71%
Negative predictive value	89%	88%	87%