Objectives: To develop and test the reliability of a Thai version of the King’s Health Questionnaire (KHQ).
Material and Method: Three Thai Urologists forward translated the original English KHQ into a Thai version. Back translations were performed by an independent group of physicians. A consensus was reached on a final Thai version after comparing the original KHQ and various translations. Fifty Thai female patients with symptoms of overactive bladder were tested and retested every two weeks using the Thai version (twice) as well as the English version (once) of the KHQ. Test-retest reliability of the Thai questionnaire was measured using the kappa statistic.
Results and Conclusion: The Thai version of the KHQ was found to be reasonably reliable for use in Thai female patients with over active bladder symptoms.

Keywords: King’s Health Questionnaire, Thai, Reliability, Overactive bladder