Validity and Reliability of the Modified Thai Adolescent's Physical Activity Questionnaire

This study sought to determine the validity and reliability of a self-report instrument, the Modified Thai Adolescent's Physical Activity Questionnaire (MTAPAQ). Concurrent validity was assessed using 40 secondary school Thai adolescents (17 males and 23 females), who wore an ActiGraph accelerometer, during their waking hours for seven consecutive days. The students completed the MTAPAQ upon completion of the recording period. Reliability was evaluated using 30 secondary school Thai adolescents (12 males and 18 females) who completed the MTAPAQ by recalling their physical activities during the previous seven days, on two separate occasions that were three days apart. A significant correlation was found between the Metabolic Equivalent of Tasks (MET-mins), as determined by the MTAPAQ, and log (10) transformed activity counts, as determined by the ActiGraph accelerometer. The test-retest reliability, of the two administrations of the MTAPAQ, was found to be significant. The findings provide evidence of an acceptable level of concurrent validity and test-retest reliability of the MTAPAQ for use with Thai adolescents.