Using open source accelerometer analysis to assess physical activity and sedentary behaviour in overweight and obese adults

Table 3 Mean ± SD for questionnaire and accelerometer assessed sedentary time, walking and MVPA and their differences

		Sedentary (mins/day)				Walking (mins/day)				MVPA (mins/day)
		Questionnaire	Acc^a	Mean difference (Limits of agreement)	p	Questionnaire	Acc	Mean difference (Limits of agreement)	p	Questionnaire	Acc	Mean difference (Limits of agreement)	p
BMI	Normal	476 ± 84	597 ± 67	− 121 (− 227 to 35)	< 0.001	56 ± 29	42 ± 27	14 (−53 to 61)	< 0.001	125 ± 23	103 ± 19	21 (−33 to 56)	< 0.001
	Overweight	545 ± 91	704 ± 73	− 159 (− 345 to 27)	< 0.001	95 ± 27	77 ± 21	18 (−45 to 61)	< 0.001	121 ± 27	100 ± 21	20 (−43 to 63)	< 0.001
	Obese	628 ± 83	823 ± 94	−195 (− 394 to 5)	< 0.001	96 ± 23	77 ± 19	19 (−36 to 54)	< 0.001	70 ± 29	44 ± 27	25 (−52 to 63)	< 0.001
BIA	Average	422 ± 78	521 ± 86	−99 (− 283 to 85)	< 0.001	102 ± 27	83 ± 25	19 (−43 to 62)	< 0.001	133 ± 27	121 ± 25	19 (−41 to 65)	< 0.001
	High	532 ± 69	638 ± 98	− 106 (− 325 to 114)	< 0.001	78 ± 32	61 ± 28	17 (−56 to 70)	< 0.001	111 ± 32	82 ± 28	29 (−54 to 72)	< 0.001
	Obese	656 ± 73	798 ± 102	−142 (− 388 to 104)	< 0.001	43 ± 36	37 ± 29	14 (−67 to 74)	< 0.001	48 ± 36	24 ± 29	24 (− 66 to 75)	< 0.001
WHR	Normal	457 ± 82	560 ± 60	− 103 (− 251 to 46)	< 0.001	130 ± 22	123 ± 17	7 (−31 to 54)	0.067	169 ± 22	158 ± 17	11 (−27 to 58)	0.058
	Overweight	601 ± 78	644 ± 72	−43 (− 207 to 121)	< 0.001	78 ± 24	71 ± 21	7 (−40 to 54)	0.063	101 ± 24	92 ± 21	9 (−38 to 56)	0.064
	Obesity	712 ± 82	845 ± 97	−133 (− 307 to 41)	< 0.001	55 ± 25	50 ± 28	5 (−45 to 55)	0.057	82 ± 25	65 ± 28	12 (−43 to 56)	0.052

^a Abbreviations: Acc, accelerometer. Limits of Agreement expressed as the mean difference between methods ±1.96SD
Non-significant P values are shown in bold

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