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

Table 4 Comparison of non-occupational physical activity between the baseline EPIC and LTPAQ questionnaires

Baseline EPIC versus LTPAQ	MET-hours/week
	Correlation (ρ)	95% CI
Total non-occupational activity^a
Overall^b (n = 182)	0.26	0.11, 0.39	***
Gender
Males (n = 100)	0.16	-0.04, 0.35
Females (n = 82)	0.25	0.03, 0.44	*
Body mass index
< 27.2 (n = 89)	0.27	0.07, 0.45	**
≥ 27.2 (n = 92)	0.22	0.02, 0.41	*
Age
< 58 years (n = 95)	0.17	-0.03, 0.36
≥ 58 years (n = 87)	0.36	0.16, 0.53	***
Employment status
Full-time work (n = 113)	0.17	-0.01, 0.35
Other (n = 68)	0.21	-0.03, 0.43
Recreational activity	0.21	0.07, 0.34	*
Household activity	0.46	0.34, 0.57	***
Vigorous activity^c	0.40	0.27, 0.52	***
Light-moderate activity^d	0.26	0.12, 0.39	***

* P < 0.05; ** P < 0.01; *** P < 0.001
EPIC, European Prospective Investigation into Cancer and Nutrition; LTPAQ, Lifetime Total Physical Activity Questionnaire; ρ, Spearman rank correlation coefficient; CI, confidence interval
^a Total non-occupational activity = recreational + household physical activity
^b There were no statistically significant differences in correlations for non-occupational activity between subgroups (P_diff >0.10)
^c Vigorous activity was estimated using the sum of time spent in activities with MET values ≥ 6 from each questionnaire
^d Light-moderate activity was estimated using the sum of time spent in activities with MET values < 6 from each questionnaire

ISSN: 1479-5868