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Table 3 Classification accuracy of BASIC-Q for cognitive impairment at different cutoff scores

From: Diagnostic accuracy of BASIC-Q for detection of cognitive impairment in a primary care setting – a cross-validation study

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)

  1. Abbreviations: CI, confidence interval; LR+, Positive likelihood ratio; LR–, Negative likelihood ratio
  2. *Optimal cutoff score