Construct validity of the Thai version of the job content questionnaire in a large population of heterogeneous occupations.
OBJECTIVE
To test the construct validity of the Thai version of the job content questionnaire (TJCQ).


METHODS
The present descriptive study recruited 10415 participants from all occupations according to the International Standard Classification of Occupations. The instrument consisted of a 48-item of the job content questionnaire. Eight items newly developed by the authors from in-depth interviews were added.


RESULTS
Exploratory factor analysis showed six factor models of work hazards, decision latitude, psychological demand, social support, physical demand, and job security. However, supervisor and co-worker support were not distinguished into two factors and some items distributed differently along the factors extracted. Confirmatory factor analysis supported the construct of six latent factors, although the overall fit was moderately acceptable. Cronbach's alpha coefficients higher than 0.7, supported the internal consistency of TJCQ scales except for job security (0.55).


CONCLUSIONS
These findings suggest that TJCQ is valid and reliable for assessing job stress among Thai populations.
Occupational Health Unit, Community Medicine Department, Faculty of Medicine, Prince of Songkla University, Hat Yai, Songkhla, Thailand. pphakthongsuk@gmail.com
Pitchaya
P
Phakthongsuk
D000293:Adolescent; D000328:Adult; D000368:Aged; D044466:Asian People; D003430:Cross-Sectional Studies; D003657:Decision Making; D005163:Factor Analysis, Statistical; D005260:Female; D006801:Humans; D007587:Job Description; D007588:Job Satisfaction; D008297:Male; D008875:Middle Aged; D009784:Occupational Diseases; D009790:Occupations; D011594:Psychometrics; D015203:Reproducibility of Results; D012680:Sensitivity and Specificity; D012944:Social Support; D013315:Stress, Psychological / Q000523:psychology*; D011795:Surveys and Questionnaires / Q000592:standards*; D013647:Task Performance and Analysis; D013785:Thailand; D016526:Workload / Q000523:psychology*; D017132:Workplace / Q000523:psychology*; D055815:Young Adult