Recently developed and originally published in English, the Child and Adolescent HARDSHIP (headache-attributed restriction, disability, social handicap and impaired participation) questionnaire is valid and acceptable for the global assessment of the burden of headache in children and adolescents. The present study aimed to translate, adapt and validate a Lithuanian version of this questionnaire. A total of 22 volunteers from 7 to 17 years of age completed the questionnaire with 24 h test-retest and a representative sample of 2505 schoolchildren of the same age participated in the main study. Test-retest reliability of the HRQoL (Headache Related Quality of Life) scale in the translated questionnaire showed substantial agreement (kappa: 0.604). Reliability and validity of the translated HRQoL scale were acceptable (Cronbach's alpha: 0.749; test-retest kappa: 0.604, test for discriminant validity demonstrated that quality of life decreased by severity of headache). Factorial analysis revealed the two-dimensional structure of the HRQoL scale with indices of good model fit to the collected data. A total of 92.2% of the surveyed children had experienced headache in their lifetime, 74.2% during the last year. Girls and older children experienced headache more often than participants from the other groups. The translated Lithuanian version of the questionnaire seems to be a valid, feasible and acceptable instrument to measure the extent of the burden of headache in large populations.
Keywords: Global Campaign against Headache; Lithuania; adolescents; burden; children; headache disorders; quality of life; questionnaire; translation.