Cross-Cultural Adaptation of Modified Oswestry Low Back Pain Disability Questionnaire to Thai and Its Reliability
Prasert Sakulsriprasert MSc*, Roongtiwa Vachalathiti PhD*, Mantana Vongsirinavarat PhD*, Juthamard Kantasorn MSc*
Affiliation : * Faculty of Physical Therapy and Applied Movement Science, Mahidol University
Objective : The present study aimed to cross-culturally adapt the modified Oswestry Low Back Pain Disability
Questionnaire (ODQ) into Thai.
Materials and Methods : The process comprised of an initial forward translations from English to Thai, synthe-
sis of the translations, back translation, and back translation approval. The approved version of Thai ODQ
was then calculated for test-retest reliability. Forty patients with LBP, aged 40.1 + 10.7 years, were recruited
into a test-retest reliability study.
Results : The test-retest reliability, calculated by intraclass correlation coefficient, was assessed on two occa-
sions separated by a time interval of 20-30 minutes. The values of test-retest reliability of items ranged from
0.80-1.00. The value of total score was 0.98.
Conclusion : This finding indicated good reliability of the Thai version modified ODQ.
Keywords : Reliability, Cross-cultural translation, Modified Oswestry Disability Questionnaire, Low Back Pain
