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Table 2 Physical activity levels as estimated from accelerometer measurement and EPIC and LTPAQ self-reported questionnaires

From: Validity and repeatability of the EPIC physical activity questionnaire: a validation study using accelerometers as an objective measure

Physical activity assessment Median (25th-75th centile)
  Hours/week Counts
Accelerometer a   
   Total counts per day   347328 (278084–428769)
   Average counts per minute   398 (316–483)
   MET-hours/week
   Total activity 46.7 (39.8–53.6) 160.0 (135.3–183.6)
   Light intensity 25.9 (21.1–29.4) 64.8 (52.8–73.5)
   Moderate intensity 19.5 (16.3–23.7) 87.6 (73.4–106.5)
   Vigorous intensity 0.2 (0.0–0.7) 1.1 (0.3–4.3)
   Sedentary timeb 121.1 (114.1–128.1)  
EPIC questionnaire (10 months)   
   Total non-occupationalc 20.3 (13.6–31.6) 73.5 (52.6–116.0)
   Recreational 9.0 (5.5–14.0) 34.5 (19.5–54.0)
   Household 10.1 (5.2–20.1) 37.7 (19.0–68.8)
   Vigorous activity, self-ratedd 2.0 (0.0–5.0) 18.0 (0.0–45.0)
   Vigorous activity, MET-assignede 2.0 (0.3–4.8) 12.4 (1.6–28.8)
   Light-moderate activitye 17.5 (10.5–28.0) 59.8 (34.3–96.0)
LTPAQ questionnaire   
   Total activityf 33.4 (26.8–41.3) 98.6 (72.6–123.3)
   Non-occupational 12.2 (7.2–19.4) 46.2 (29.6–72.2)
   Occupationalf 17.1 (10.6–24.1) 40.1 (23.2–58.5)
   Recreational 3.0 (1.6–4.2) 15.5 (8.2–23.8)
   Household 7.2 (3.5–13.7) 22.6 (11.6–45.9)
   Active transportation 0.9 (0.5–1.4) 2.9 (1.7–4.5)
   Vigorous activity, MET-assignede 0.5 (0.1–1.5) 3.8 (0.7–12.4)
   Light-moderate activitye 30.5 (23.6–38.9) 86.9 (65.6–112.8)
  1. EPIC, European Prospective Investigation into Cancer and Nutrition; LTPAQ, Lifetime Total Physical Activity Questionnaire
  2. a Data are averages of three 7-day accelerometer periods. The Swartz cut-points [23] were used to estimate the time spent in light, moderate and vigorous intensity activity.
  3. b Sedentary time defined as <100 counts/min, and includes non-wear and sleep time; corresponds to 17.3 (16.3–18.3) hours/day
  4. c Combined recreational and household physical activity
  5. d Estimated from a question about time in activities causing sweating or faster heartbeat
  6. e MET-assigned vigorous activity estimated using the sum of time spent in activities with MET values ≥ 6; Light-moderate activity was estimated using the sum of time spent in activities with MET values < 6
  7. f Occupational activities with a mean MET value of ≤ 1.5 (i.e. purely sedentary occupations) were excluded from activity estimates