Table 2 Sensitivity, specificity, predictive values (PV), and kappa values for different headache diagnoses among screen-positive, compared with the whole sample (screen-positive and screen-negative)
Suffered from headache during the last year (n = 92) | Sensitivity | Specificity | Positive (PV) | Negative (PV) | Kappa (95% CI) |
|---|---|---|---|---|---|
Migraine (n = 51) | 41 | 94 | 75 | 78 | 0.40 (0.27–0.53) |
Migraine ≥1 days per month (n = 42) | 40 | 98 | 88 | 78 | 0.44 (0.31–0.57) |
Tension-type headache (n = 154) | 63 | 53 | 38 | 76 | 0.14 (0.03–0.25) |
Tension-type headache ≥1 days per month (n = 88) | 59 | 83 | 66 | 82 | 0.43 (0.31–0.55) |
Chronic tension-type headache (n = 12) | 13 | 100 | 100 | 72 | 0.17 (0.01–0.33) |
Medication-overuse headache (n = 6) | 7 | 100 | 100 | 70 | 0.09 (−0.05–0.25) |