Table 3.
Screening performance characteristics of different scoring systems in prediction of acute appendicitis in emergency department
| Alvarado | Ohmann | RIPASA | Tzanakis | Eskelinen | |
|---|---|---|---|---|---|
| TP | 40 | 47 | 55 | 56 | 42 |
| TN | 8 | 8 | 8 | 8 | 7 |
| FP | 1 | 1 | 1 | 1 | 2 |
| FN | 25 | 18 | 10 | 9 | 23 |
| Sensitivity | 60.9 (48.64-73.35) |
71.9 (59.81-82.69) |
75 (64.81-86.47) |
84.4 (75.34-93.47) |
64.1 (51.77-76.08) |
| Specificity | 89.9 (51.75-99.72) |
89.9 (51.75-99.72) |
99.72 (51.75-100) |
99.88 (51.75-99.72) |
78 (39.99-99.19) |
| PPV | 97.56 (86.19-99.61) |
97.92 (88.04-99.67) |
98.04 (88.69-99.69) |
98.25 (89.80-99.72) |
95.45 (85.93-98.63) |
| NPV | 24.24 (17.89-31.98) |
30.77 (21.98-41.21) |
34.78 (24.44-46.80) |
47.06 (31.72-62.97) |
23.33 (15.86-32.96) |
| PLR | 5.54 (0.86-35.56) |
6.51 (1.02-41.55) |
6.92 (1.09-44.15) |
7.75 (1.22-49.24) |
2.91 (0.85-10.00) |
| NLR | 0.43 (0.29-0.64) |
0.21 (0.20-0.49) |
0.26 (0.16-0.43) |
0.16 (0.08-0.30) |
0.45 (0.28-0.73) |
| AUC | 0.93 (0.87-0.99) |
0.94 (0.88-1.00) |
0.89 (0.81-0.97) |
0.96 (0.90-1.00) |
0.86 (0.77-0.97) |
Data are presented with 95% confidence interval (CI). Measures are calculated in cut-offs: ≥8 for Alvarado score; ≥12 for Ohmann score; ≥12 for RIPASA score; ≥8 for Tzanakis score; ≥57 for Eskelinen score.
TP: true positive; TN: true negative; FP: false positive; FN: false negative; PPV: positive predictive value; NPV: negative predictive value; PLR: positive likelihood ratio; Negative likelihood ratio; AUC; area under the receiver operating characteristic (ROC) curve.