Table 2. Sensitivity and specificity of the DSQ-27 in Afghanistan.
| n (%) | True positive | False positive | True negative | False negative | CC | Sensitivity (95%CI) | Specificity (95%CI) | PLR (95%CI) | NLR (95%CI) | Condition prevalence | PPV (95%CI) | NPV (95%CI) | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Male children (5–14) | 677 | 161 (23.8) | 15 (2.2) | 294 (43.4) | 207 (30.6) | 67.2 | 43.75 (38.61–48.99) | 95.15 (92.12–97.26) | 9.01 (5.43–14.96) | 0.59 (0.54–0.65) | 54.36 (50.52–58.16) | 91.48 (86.33–95.15) | 58.68 (54.23–63.03) |
| Female children (5–14) | 507 | 132 (26) | 5 (1.0) | 178 (35.1) | 192 (37.9) | 61.1 | 40.74(35.34–46.31) | 97.27 (93.73–99.10) | 14.91 (6.22–35.75) | 0.61 (0.55–0.67) | 63.91 (59.55–68.09) | 96.35 (91.68–98.79) | 48.11 (42.91–53.33) |
| Male adults (> = 15) | 865 | 375 (43.4) | 43 (5.0) | 400 (46.2) | 47 (5.4) | 89.6 | 88.86 (85.47–91.70) | 90.29 (87.15–92.89) | 9.15 (6.88–12.19) | 0.12 (0.09–0.16) | 48.79 (45.41–52.17) | 89.71 (86.39–92.45) | 89.49 (86.26–92.17) |
| Female adults (> = 15) | 647 | 267 (41.3) | 13 (2.0) | 261 (40.3) | 106 (16.4) | 81.6 | 71.58 (66.71–76.11) | 95.26 (92.02–97.45) | 15.09 (8.84–25.75) | 0.30 (0.25–0.35) | 57.65 (53.74–61.49) | 95.36 (92.19–97.50) | 71.12 (66.19–75.70) |
| Overall | 2696 | 935(34.7) | 76 (2.8) | 1133 (42.0) | 552 (20.5) | 76.7 | 62.88 (60.37–65.34) | 93.71 (92.19–95.02) | 10 (8.02–12.48) | 0.4 (0.37–0.42) | 55.16 (53.26–57.05) | 92.48 (90.68–94.03) | 67.24 (64.94–69.48) |
Notes. CC = Correct classification; SN = Sensitivity; SP = PPV = Positive predictive value; Negative predictive value; LR+ = Positive likelihood ratio; LR- = Negative likelihood ratio.