Clinical Study
Ultrasound for Appendicitis: Performance and Integration with Clinical Parameters
Table 3
Diagnostic performance of ultrasound for appendicitis with regard to gender, age group, and experience of examiner.
| | | Diagnostic performance% (95% CI) | LR+/LR− (95% CI) | | | Sensitivity | Specificity | PPV | NPV |
| | All patients | 82 (75–89) | 97 (94–99) | 92 (85–96) | 93 (90–96) | 28 (15–55)/0.18 (0.12–0.26) | | Boys | 83 (72–91) | 98 (94–100) | 93 (84–99) | 92 (87–96) | | | Girls | 80 (67–92) | 97 (94–99) | 91 (78–99) | 93 (89–98) | |
| | Age group (years) | | | | | | | 0–4 | 74 (45–92) | 96 (84–100) | 92 (66–100) | 89 (75–96) | | | 5–9 | 86 (71–95) | 100 (96–100) | 100 (89–100) | 95 (90–98) | | | 10–14 | 81 (67–91) | 95 (90–99) | 88 (74–96) | 92 (87–95) | |
| | Examiner | | | | | | | Pediatric radiologist | 88 (76–95) | 98 (93–100) | 94 (86–99) | 95 (90–99) | | | Radiologist | 71 (56–84) | 97 (94–99) | 90 (74–98) | 91 (86–95) | |
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PPV: positive predictive value; NPV: negative predictive value; CI: confidence interval; LR: likelihood ratio.
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