Table 5 Properties of validity for diagnosis of pain with neuropathic involvement in different subgroups by pain severity and educational level in the overall sample.
Cut-off value ≥ 4 points | Sensitivity (%) | Specificity (%) | PPV (%) | NPV (%) | Kappa |
|---|---|---|---|---|---|
Pain severity (VAS) | |||||
Mild; < 40 mm (n = 12) | 55.6 | 66.7 | 83.3 | 33.3 | 0.17‡ |
Moderate; ≥ 40 and < 70 mm (n = 65) | 85.0 | 84.0 | 89.5 | 77.8 | 0.68††† |
Severe; ≥ 70 mm (n = 81) | 80.0 | 74.2 | 83.3 | 69.7 | 0.54††† |
Educational level | |||||
No studies (n = 39) | 81.3 | 73.9 | 68.4 | 85.0 | 0.54†† |
Primary school (n = 69) | 77.1 | 81.0 | 90.2 | 60.7 | 0.53††† |
High school (n = 14) | 83.3 | 100 | 100 | 50.0 | 0.59† |
Vocational training (n = 16) | 78.6 | 100.0 | 100 | 40 | 0.48† |
Graduate studies (n = 18) | 87.5 | 70.0 | 70.0 | 87.5 | 0.56† |