Table 3
Agreement between lay interviewers and an expert on migrainous disorders fulfilling all IHS criteria except one (code 1.7 of the IHS classification)
| Expert | |||
|---|---|---|---|
| Lay interviewers | No migraine | Migraine | Total |
| Values are numbers of subjects. Sensitivity 73.2%, specificity 64.2%, positive predictive value 83.3%, negative predictive value 49.4%. IHS, International Headache Society. | |||
| No migraine | 43 | 44 | 87 |
| Migraine | 24 | 120 | 144 |
| Total | 67 | 164 | 231 |
