Table 4.

Mean data for Polar M430 and ActiGraph, and correlation, p-value, mean absolute percentage error, and Bland-Altman mean difference and limits of agreements (LoA), for steps, moderate-to-vigorous physical activity, and total energy expenditure. Person-days: n = 203

Variable	Polar	ActiGraph	Correlation (95% CI)	P-value	MAPE	Mean difference	Lower LoA	Upper LoA
Steps	8956 (5106)	5165 (3230)	0.625 (0.44, 0.70)	< 0.001	119.5%	3791	− 4860	12,442
MVPA	143 (97)	44 (32)	0.495 (0.31, 0.53)	< 0.001	373.9%	99.0	−80.4	278.4
TEE	2868 (581)	2967 (458)	0.446 (0.50, 0.69)	< 0.001	10.6%	− 98.7	− 948.5	751.1

Numbers are means (standard deviations). MVPA Moderate-to-vigorous physical activity, TEE Total energy expenditure, Correlation Repeated measurement correlation with 95% confidence interval, MAPE Mean absolute percentage error, LoA Limits of agreement