title: Comparison of the EPIC Physical Activity Questionnaire with combined heart rate and movement sensing in a nationally representative sample of older British adults.
abstract: OBJECTIVE
  To compare physical activity (PA) subcomponents from EPIC Physical Activity Questionnaire (EPAQ2) and combined heart rate and movement sensing in older adults.
  
  
  METHODS
  Participants aged 60-64y from the MRC National Survey of Health and Development in Great Britain completed EPAQ2, which assesses self-report PA in 4 domains (leisure time, occupation, transportation and domestic life) during the past year and wore a combined sensor for 5 consecutive days. Estimates of PA energy expenditure (PAEE), sedentary behaviour, light (LPA) and moderate-to-vigorous PA (MVPA) were obtained from EPAQ2 and combined sensing and compared. Complete data were available in 1689 participants (52% women).
  
  
  RESULTS
  EPAQ2 estimates of PAEE and MVPA were higher than objective estimates and sedentary time and LPA estimates were lower [bias (95% limits of agreement) in men and women were 32.3 (-61.5 to 122.6) and 29.0 (-39.2 to 94.6) kJ/kg/day for PAEE; -4.6 (-10.6 to 1.3) and -6.0 (-10.9 to -1.0) h/day for sedentary time; -171.8 (-454.5 to 110.8) and -60.4 (-367.5 to 246.6) min/day for LPA; 91.1 (-159.5 to 341.8) and 55.4 (-117.2 to 228.0) min/day for MVPA]. There were significant positive correlations between all self-reported and objectively assessed PA subcomponents (rho= 0.12 to 0.36); the strongest were observed for MVPA (rho = 0.30 men; rho = 0.36 women) and PAEE (rho = 0.26 men; rho = 0.25 women).
  
  
  CONCLUSIONS
  EPAQ2 produces higher estimates of PAEE and MVPA and lower estimates of sedentary and LPA than objective assessment. However, both methodologies rank individuals similarly, suggesting that EPAQ2 may be used in etiological studies in this population.
authors: Medical Research Council Epidemiology Unit, University of Cambridge, School of Clinical Medicine, Institute of Metabolic Science, Cambridge, United Kingdom.
authors: Vanesa
authors: V
authors: España-Romero
authors: Medical Research Council Epidemiology Unit, University of Cambridge, School of Clinical Medicine, Institute of Metabolic Science, Cambridge, United Kingdom.
authors: Rajna
authors: R
authors: Golubic
authors: Medical Research Council Unit for Lifelong Health and Ageing at University College London, London, United Kingdom ; Epidemiology Group, Institute of Applied Health Sciences, University of Aberdeen, School of Medicine and Dentistry, Aberdeen, United Kingdom.
authors: Kathryn R
authors: KR
authors: Martin
authors: Medical Research Council Unit for Lifelong Health and Ageing at University College London, London, United Kingdom.
authors: Rebecca
authors: R
authors: Hardy
authors: Medical Research Council Epidemiology Unit, University of Cambridge, School of Clinical Medicine, Institute of Metabolic Science, Cambridge, United Kingdom ; Norwegian School of Sport Sciences, Norges Idrettshøgskole, Oslo, Norway.
authors: Ulf
authors: U
authors: Ekelund
authors: Medical Research Council Unit for Lifelong Health and Ageing at University College London, London, United Kingdom.
authors: Diana
authors: D
authors: Kuh
authors: Medical Research Council Epidemiology Unit, University of Cambridge, School of Clinical Medicine, Institute of Metabolic Science, Cambridge, United Kingdom.
authors: Nicholas J
authors: NJ
authors: Wareham
authors: Medical Research Council Unit for Lifelong Health and Ageing at University College London, London, United Kingdom.
authors: Rachel
authors: R
authors: Cooper
authors: Medical Research Council Epidemiology Unit, University of Cambridge, School of Clinical Medicine, Institute of Metabolic Science, Cambridge, United Kingdom.
authors: Soren
authors: S
authors: Brage
mesh_terms: D000328:Adult; D004734:Energy Metabolism / Q000502:physiology; D005260:Female; D006339:Heart Rate / Q000502:physiology*; D006801:Humans; D007699:Kinesthesis / Q000502:physiology*; D008297:Male; D008875:Middle Aged; D009043:Motor Activity / Q000502:physiology*; D009369:Neoplasms / Q000453:epidemiology*; D011446:Prospective Studies; D057185:Sedentary Behavior; D011795:Surveys and Questionnaires; D013997:Time Factors; D006113:United Kingdom / Q000453:epidemiology