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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