title: Comparison of the Danish Physical Activity Questionnaire with a validated position and motion instrument.
abstract: OBJECTIVE
  To compare the Danish Physical Activity Questionnaire (DPAQ) estimating physical activity energy expenditure (PAEE) and physical activity level (PAL) and the pattern of physical activity (including health-related physical activity) with measurements from a validated position and motion instrument (ActiReg).
  
  
  METHODS
  One hundred and thirty-eight healthy Danish volunteers aged 20-59 years participated. Participants filled in the DPAQ at the end of the day every day for seven consecutive days and carried the ActiReg on the same days as the DPAQ were filled in.
  
  
  RESULTS
  A small, but statistically significant difference was seen between the DPAQ and the ActiReg for PAEE (mean: -0.32 MJ x d(-1); 95% limits of agreement: ((-2.88)-2.24 MJ x d(-1)); P = 0.003) and PAL (-0.03; ((-0.37)-0.31); P = 0.02) for the whole group and for women (P < 0.008 for PAEE and PAL), but not for men. The correlation between methods was good for PAEE (r = 0.71, P < 0.001) and PAL (r = 0.64, P < 0.001). No difference was observed for time spent in moderate plus vigorous physical activity (MVPA) (P = 0.40). Time reported in MVPA with the DPAQ was positively correlated with time spent in MVPA measured by the ActiReg (p = 0.53, P < 0.001).
  
  
  CONCLUSIONS
  Although the volunteer sample may influence the representativeness of the results, the DPAQ provided a close estimate of PAEE, PAL (2-5% underestimation) and health-related physical activity (MVPA) in healthy adults at group level. The results indicate that the questionnaire can be used to rank individuals according to energy expenditure and level of total physical activity and to provide information on health-related physical activity.
authors.affiliation: Department of Nutrition, National Food Institute, Technical University of Denmark, Mørkhøj Bygade 19, 2860 Soborg, Denmark. jem@food.dtu.dk
authors.forename: Jeppe
authors.initials: J
authors.lastname: Matthiessen
authors.forename: Anja
authors.initials: A
authors.lastname: Biltoft-Jensen
authors.forename: Lone B
authors.initials: LB
authors.lastname: Rasmussen
authors.forename: Ole
authors.initials: O
authors.lastname: Hels
authors.forename: Sisse
authors.initials: S
authors.lastname: Fagt
authors.forename: Margit V
authors.initials: MV
authors.lastname: Groth
mesh_terms: D000328:Adult; D003718:Denmark; D004734:Energy Metabolism; D015444:Exercise; D005080:Exercise Test; D005260:Female; D015438:Health Behavior; D006801:Humans; D007899:Leisure Activities; D008297:Male; D008875:Middle Aged; D009043:Motor Activity; D015203:Reproducibility of Results; D012650:Self Disclosure; D011795:Surveys and Questionnaires