Validation of a Georgian language headache questionnaire in a population-based sample

In a pilot phase of a survey of the prevalence of primary headache disorders in the Republic of Georgia, we validated a Georgian language questionnaire for migraine (MIG), tension-type headache (TTH), MIG+TTH and trigeminal autonomic cephalalgias (TAC). A population-based sample of 186 people with headache completed the questionnaire and were blindly examined by one of two headache experts. The questionnaire diagnoses were: MIG 49, TTH 76, MIG+TTH 45 and TAC 16. The physicians' diagnoses were: MIG 59, TTH 77, MIG+TTH 34, TAC 2 and "symptomatic headache" in 14 subjects. Sensitivity and specificity for MIG were 0.75 and 0.96, for TTH 0.79 and 0.86, and for MIG+TTH 0.61 and 0.84 respectively. Of 16 TAC diagnoses, the physicians confirmed cluster headache in two patients only. The questionnaire can be utilised to investigate the prevalence of MIG and of TTH. It offers preliminary screening only for TAC, which should be confirmed during a face to face examination.