RESUMEN
The purpose of this study was to validate the association between the all forms of Thai version of General Health Questionnaire (GHQ-60, GHQ-30, GHQ-28, GHQ-12) with the Thai Mental Health Questionnaire (TMHQ). Methods: The survey samples were 770 Thai policemen from 12 police stations under the Fifth Organization force Bureau Data collected from the Thai version of General Health Questionnaire and the Thai Mental Health Questionnaire. Results: There was a association between the GHQ Thai version and TMHQ. The effectiveness was found by the prevalence rate of mental illness, Cronbach Alpha reliability coefficient, and the similar construct validity between GHQ-28 and TMHQ. Conclusion: Forms of the GHQ, TMHQ can be compared in term of construct validity with GHQ-28.