Table 3.

Classification accuracy of BASIC-Q for cognitive impairment at different cutoff scores

Cutoff	Sensitivity (95% CI)	Specificity (95% CI)	LR+ (95% CI)	LR- (95% CI)
14/15	0.56 (0.47–0.66)	0.86 (0.80–0.91)	3.95 (2.59–6.03)	0.51 (0.40–0.64)
15/16	0.68 (0.59–0.77)	0.81 (0.75–0.87)	3.63 (2.55–5.17)	0.39 (0.29–0.53)
16/17*	0.80 (0.72–0.87)	0.71 (0.63–0.78)	2.75 (2.11–3.58)	0.28 (0.19–0.42)
17/18	0.91 (0.85–0.96)	0.59 (0.51–0.67)	2.23 (1.82–2.72)	0.15 (0.08–0.29)
18/19	0.98 (0.94-1.00)	0.36 (0.28–0.44)	1.53 (1.35–1.72)	0.06 (0.01–0.22)

Abbreviations: CI, confidence interval; LR+, Positive likelihood ratio; LR–, Negative likelihood ratio

*Optimal cutoff score