Table 4.
Diagnostic accuracy of the ABSI for predicting ulcer in burn patients
| ABSI above 5 |
ABSI above 6 |
ABSI above 7 |
|||||||
|---|---|---|---|---|---|---|---|---|---|
| Yes | No | Yes | No | Yes | No | ||||
| Ulcer (n) | 40 | 11 | 34 | 17 | 24 | 27 | |||
| Non-ulcer (n) | 39 | 45 | 20 | 64 | 11 | 73 | |||
| Sensitivity (95% CI) | 78.40 (64.68–88.71) | 66.67 (52.08–79.24) | 47.06 (32.93–61.54) | ||||||
| Specificity (95% CI) | 53.57 (42.30–64.53) | 76.19 (65.65–84.81) | 86.90 (77.78–93.28) | ||||||
| PPV (95% CI) | 50.63 (39.14–62.08) | 62.96 (48.74–75.71) | 68.57 (50.71–83.15) | ||||||
| NPV (95% CI) | 80.36 (67.57–89.77) | 79.01 (68.54–87.27) | 73.00 (63.20–81.39) | ||||||
| Likelihood ratio (+) | 1.69 (1.29–2.22) | 2.80 (1.82–4.30) | 3.59 (1.93–6.70) | ||||||
| Likelihood ratio (-) | 0.40 (0.23–0.70) | 0.44 (0.29–0.66) | 0.61 (0.46–0.80) | ||||||
| Area under the ROC curve (95% CI) | 0.736 (0.648–0.824) | 0.736 (0.648–0.824) | 0.736 (0.648–0.824) | ||||||
ABSI, abbreviated burn severity index; CI, confidence interval; PPV, positive predictive values; NPV, negative predictive values; ROC, receiver operating characteristic.