title: Validation of a new physical activity questionnaire for a sedentary population.
abstract: BACKGROUND
  Many available physical activity questionnaires (PAQs) are limited due to either focus on recreational activities or burdensome length.
  
  
  OBJECTIVE
  We sought to assess the reliability and validity of a new short PAQ that captures all activity types.
  
  
  METHODS
  The 12-item multiple-choice PAQ-M included eight activity domains, providing a total Physical Activity Score (PAS-M) in kcal/kg/week. The new PAQ-M was administered with the previously validated Paffenbarger PAQ to 426 men, ages 50-79, undergoing colon-cancer screening.
  
  
  RESULTS
  The PAQ-M had excellent test-retest reliability (intraclass correlation = 0.87). The PAS-M was moderately correlated with the Paffenbarger Physical Activity Score (PAS-P) (r = 0.31) and inversely correlated with BMI (r = -0.14) and waist circumference (r = -0.17). Adenoma prevalence was inversely associated with the PAS-M (3rd vs. 1st tertile adjusted odds ratio, 0.46; 95% confidence interval, 0.26-0.84) but not with the PAS-P.
  
  
  CONCLUSIONS
  Our new short physical activity questionnaire has excellent test-retest reliability, and was correlated moderately with a widely used physical activity questionnaire and obesity measures. Furthermore, the new PAQ was a better predictor of adenoma prevalence in the expected direction than the Paffenbarger questionnaire in this largely sedentary population.
authors.affiliation: VA Medical Center 111-D, 2215 Fuller Road, Ann Arbor, MI 48105, USA. jhr@umich.edu
authors.forename: Joel H
authors.initials: JH
authors.lastname: Rubenstein
authors.forename: Hal
authors.initials: H
authors.lastname: Morgenstern
authors.forename: Joan
authors.initials: J
authors.lastname: Kellenberg
authors.forename: Tal
authors.initials: T
authors.lastname: Kalish
authors.forename: Jena
authors.initials: J
authors.lastname: Donovan
authors.forename: John
authors.initials: J
authors.lastname: Inadomi
authors.forename: Daniel
authors.initials: D
authors.lastname: McConnell
authors.forename: Jadranka
authors.initials: J
authors.lastname: Stojanovska
authors.forename: Philip
authors.initials: P
authors.lastname: Schoenfeld
mesh_terms: D000236:Adenoma / Q000175:diagnosis / Q000209:etiology; D000368:Aged; D003110:Colonic Neoplasms / Q000517:prevention & control; D003111:Colonic Polyps / Q000175:diagnosis / Q000209:etiology; D003625:Data Collection / Q000379:methods*; D055088:Early Detection of Cancer; D015444:Exercise / Q000502:physiology*; D006801:Humans; D008297:Male; D008875:Middle Aged; D009765:Obesity; D011795:Surveys and Questionnaires