title: Reliability and validity of the modifiable activity questionnaire for an Iranian urban adolescent population.
abstract: BACKGROUND
  The purpose of this study was to evaluate the validity and reliability on the Persian translation of the Modifiable Activity Questionnaire (MAQ) in a sample of Tehranian adolescents.
  
  
  METHODS
  Of a total of 52 subjects, a sub-sample of 40 participations (55.0% boys) was used to assess the reliability and the validity of the physical activity questionnaire. The reliability of the two MAQs was calculated by intraclass correlation coefficients, and validation was evaluated using Pearson correlation coefficients to compare data between mean of the two MAQs and mean of four physical activity records.
  
  
  RESULTS
  Intraclass correlation coefficient was calculated to assess the reliability between two MAQs and the results of leisure time physical activity over the past year were 0.97. Pearson correlation coefficients between mean of two MAQs and mean of four physical activity records were 0.49 (P < 0.001), for leisure time physical activities.
  
  
  CONCLUSIONS
  High reliability and relatively moderate validity were found for the Persian translation of the MAQ in a Tehranian adolescent population. Further studies with large sample size are suggested to assess the validity more precisely.
authors: Endocrine Research Center, Research Institute for Endocrine Sciences, Shahid Beheshti University of Medical Sciences, Tehran, Iran.
authors: Maryam
authors: M
authors: Delshad
authors: Prevention of Metabolic Disorders Research Center, Research Institute for Endocrine Sciences, Shahid Beheshti University of Medical Sciences, Tehran, Iran.
authors: Arash
authors: A
authors: Ghanbarian
authors: Endocrine Research Center, Research Institute for Endocrine Sciences, Shahid Beheshti University of Medical Sciences, Tehran, Iran ; Max Planck Institute for Biophysical Chemistry, Gottingen, Germany.
authors: Nasrollah Rezaei
authors: NR
authors: Ghaleh
authors: Endocrine Research Center, Research Institute for Endocrine Sciences, Shahid Beheshti University of Medical Sciences, Tehran, Iran.
authors: Golshan
authors: G
authors: Amirshekari
authors: Endocrine Research Center, Research Institute for Endocrine Sciences, Shahid Beheshti University of Medical Sciences, Tehran, Iran.
authors: Sahar
authors: S
authors: Askari
authors: Endocrine Research Center, Research Institute for Endocrine Sciences, Shahid Beheshti University of Medical Sciences, Tehran, Iran.
authors: Fereidoun
authors: F
authors: Azizi
keywords: Persian; physical activity; questionnaire; reliability and validity