Table 5 Diagnostic validation exercise (findings derived from comparisons between questionnaire-diagnoses and physician-diagnoses made up to four months later in self-selecting participants from the validation sub-sample) (see text)
From: The epidemiology of primary headache disorders in Zambia: a population-based door-to-door survey
| Â | Migraine | TTH |
|---|---|---|
Sensitivity* | 48.0 [34.2-61.9] | 27.8 [13.2-42.4] |
Specificity* | 57.1 [43.3-71.0] | 81.0 [71.3-90.7] |
PPV* | 53.3 [38.8-67.9] | 45.5 [24.7-66.3] |
NPV* | 51.9 [38.5-65.2] | 66.2 [55.7-76.8] |
Kappa | 5.14% | 9.52% |