Educational differences in the validity of self-reported physical activity

BMC Public Health

Table 2 Spearman correlation coefficients for the comparison of total physical activity as assessed with IPAQ and ActiGraph

Variables		Spearman correlation coefficients
IPAQ (min.day⁻¹)	ActiGraph (min.day⁻¹)	All (N = 196)^d	Lower education (N = 33)	Medium education (N = 47)	Higher education (N = 113)
MVPA	MVPA	0.157^*	−0.029	0.328^*	0.191^*
MVPA	Step counts^a	0.251^**	0.054	0.350^*	0.297^**
Total PA^b	MVPA	0.155^*	−0.074	0.299^*	0.200^*
MVPA	Total counts^c	0.268^**	0.016	0.383^**	0.322^**

^aActiGraph total step counts
^bIPAQ MET min.day⁻¹
^cActiGraph counts.day⁻¹
^dFor three people, information on educational attainment was missing. The sum of people in low, medium and high education therefore adds up to 193
IPAQ International Physical Activity Questionnaire, MVPA Moderate and Vigorous Physical Activity, PA Physical Activity
^* p < 0.05 ** p < 0.01

ISSN: 1471-2458