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@ARTICLE{Skender:130574,
      author       = {S. Skender and J. Ose and J. Chang-Claude$^*$ and M. Paskow
                      and B. Brühmann and E. M. Siegel and K. Steindorf$^*$ and
                      C. M. Ulrich},
      title        = {{A}ccelerometry and physical activity questionnaires - a
                      systematic review.},
      journal      = {BMC public health},
      volume       = {16},
      number       = {1},
      issn         = {1471-2458},
      address      = {London},
      publisher    = {BioMed Central},
      reportid     = {DKFZ-2017-05653},
      pages        = {515},
      year         = {2016},
      abstract     = {The aim of this study is to review accelerometer wear
                      methods and correlations between accelerometry and physical
                      activity questionnaire data, depending on participant
                      characteristics.We included 57 articles about physical
                      activity measurement by accelerometry and questionnaires.
                      Criteria were to have at least 100 participants of at least
                      18 years of age with manuscripts available in English.
                      Accelerometer wear methods were compared. Spearman and
                      Pearson correlation coefficients between questionnaires and
                      accelerometers and differences between genders, age
                      categories, and body mass index (BMI) categories were
                      assessed.In most investigations, requested wear time was
                      seven days during waking hours and devices were mostly
                      attached on hips with waist belts. A minimum of four valid
                      days with wear time of at least ten hours per day was
                      required in most studies. Correlations (r = Pearson,
                      ρ = Spearman) of total questionnaire scores against
                      accelerometer measures across individual studies ranged from
                      r = 0.08 to ρ = 0.58 (P < 0.001) for men and
                      from r = -0.02 to r = 0.49 (P < 0.01) for women.
                      Correlations for total physical activity among participants
                      with ages ≤65 ranged from r = 0.04 to ρ = 0.47
                      (P < 0.001) and from r = 0.16 (P = 0.02) to
                      r = 0.53 (P < 0.01) among the elderly
                      (≥65 years). Few studies investigated stratification by
                      BMI, with varying cut points and inconsistent
                      results.Accelerometers appear to provide slightly more
                      consistent results in relation to self-reported physical
                      activity among men. Nevertheless, due to overall limited
                      consistency, different aspects measured by each method, and
                      differences in the dimensions studied, it is advised that
                      studies use both questionnaires and accelerometers to gain
                      the most complete physical activity information.},
      cin          = {C020 / G210},
      ddc          = {610},
      cid          = {I:(DE-He78)C020-20160331 / I:(DE-He78)G210-20160331},
      pnm          = {317 - Translational cancer research (POF3-317)},
      pid          = {G:(DE-HGF)POF3-317},
      typ          = {PUB:(DE-HGF)16},
      pubmed       = {pmid:27306667},
      pmc          = {pmc:PMC4910242},
      doi          = {10.1186/s12889-016-3172-0},
      url          = {https://inrepo02.dkfz.de/record/130574},
}