Construct validity, test-retest reliability and internal consistency of the Thai version of the disabilities of the arm, shoulder and hand questionnaire (DASH-TH) in patients with carpal tunnel syndrome

BMC Res Notes. 2018 Mar 27;11(1):208. doi: 10.1186/s13104-018-3318-5.


Objective: This study evaluated additional psychometric properties of the Thai version of the disabilities of the arm, shoulder and hand questionnaire (DASH-TH) which included, test-retest reliability, construct validity, internal consistency of in patients with carpal tunnel syndrome. As for determining construct validity, the Thai EuroQOL questionnaire (EQ-5D-5L) was also administered in order to examine convergent and divergent validity.

Results: Fifty patients completed both questionnaires. The DASH-TH showed excellent test-retest reliability (intraclass correlation coefficient = 0.811) and internal consistency (Cronbach's alpha = 0.911). The exploratory factor analysis yielded a six-factor solution while the confirmatory factor analysis denoted that the hypothesized model adequately fit the data with a comparative fit index of 0.967 and a Tucker-Lewis index of 0.964. The related subscales between the DASH-TH and the Thai EQ-5D-5L were significantly correlated, indicating the DASH-TH's convergent and discriminant validity. The DASH-TH demonstrated good reliability, internal consistency construct validity, and multidimensionality, in assessing the upper extremity function in carpal tunnel syndrome patients.

Keywords: Carpal tunnel syndrome; DASH-TH; Factor structure; Internal consistency; Reliability; Validity.

Publication types

  • Evaluation Study
  • Validation Study

MeSH terms

  • Adult
  • Aged
  • Arm / physiopathology*
  • Carpal Tunnel Syndrome / diagnosis
  • Carpal Tunnel Syndrome / physiopathology*
  • Disability Evaluation
  • Female
  • Hand / physiopathology*
  • Humans
  • Male
  • Middle Aged
  • Psychometrics
  • Reproducibility of Results
  • Shoulder / physiopathology*
  • Surveys and Questionnaires / standards*
  • Thailand