Table 3.
Likelihood of Flexor Tenosynovitis Diagnosis from CT and/or Physical Exam.
| Variable | Sensitivity* | Specificity* | PPV* | NPV* | +LR |
|---|---|---|---|---|---|
| CR ≥ 1.3 | 83% | 97% | 97% | 85% | 28 |
| SR ≥ 1.3 | 100% | 94% | 95% | 100% | 17 |
| 4 Positive Kanavel signs | 34% | 100% | 100% | 60% | 34 |
| 3 Positive Kanavel signs | 74% | 100% | 100% | 80% | 24 |
| 2 Positive Kanavel signs | 86% | 83% | 83% | 85% | 5 |
| 1 Positive Kanavel sign | 97% | 66% | 74% | 96% | 3 |
| ≥ 3 Positive Kanavel signs and ≥ 1.3 CR | 60% | 97% | 95% | 71% | 20 |
| ≥ 3 Positive Kanavel signs and ≥ 1.3 SR | 69% | 97% | 96% | 76% | 23 |
| ≥ 2 Positive Kanavel signs and ≥ 1.3 CR | 66% | 97% | 96% | 74% | 22 |
| ≥ 2 Positive Kanavel signs and ≥ 1.3 SR | 86% | 97% | 97% | 87% | 29 |
Note. CT = computed tomography; PPV = positive predictive value; NPV = negative predictive value; LR = likelihood ratio; CR = coronal plane; SR = sagittal plane.
*
Values are expressed as means ± standard deviations or as absolute values with percentages in parentheses.