. Author manuscript; available in PMC: 2018 Nov 1.

Published in final edited form as: Obesity (Silver Spring). 2017 Nov;25(Suppl 2):S109–S115. doi: 10.1002/oby.22007

Table 2.

Accelerometer and Self-Reported Physical Activity by Time

					Change over time		Difference: accelerometer vs self-report
	Baseline	6 months	12 months	18 months	Baseline 6 months	6 – 18 months	6 months	18 months
	Median (IQR)	Median (IQR)	Median (IQR)	Median (IQR)	P value^a	P value^b	P value^c	P value^c
Accelerometer bouted MVPA min/week
Full sample (N=142)	18.4(62.1)	65.3(166.3)	40.3(131.5)	38.1(119.3)	.001	.01	.001	.001
Low loss, low regain (N= 25)	9.3(37.0)	20.2(79.2)	17.5(75.9)	0(61.3)	.488	.560	.001	.001
Low loss, high regain (N=18)	18.8(58.0)	16.1(36.5)	7.4(30.3)	22.7(85.2)	.843	.376	.001	.034
High loss, low regain (N=53)	29.8(80.1)	134.0(204.7)	88.1(124.2)	109.4(167.6)	.001	.027	.001	.001
High loss, high regain (N=46)	18.2(55.3)	89.7(178.5)	26.3(147.0)	10.5(72.2)	.001	.001	.001	.001
Paffenbarger self – reported MVPA min/week
Full sample	0(120.0)	227.5(183.7)	142.5(220.0)	150.0(222.7)	.001	.001	–	–
Low loss, low regain (N=23)	30.0(120.0)	150.0(141.2)	60.0(200.0)	60.0(170.0)	.001	.002	–	–
Low loss, high regain (N=18)	0(90.0)	180.0(218.5)	100.0(162.8)	130.0(210.0)	.001	.059	–	–
High loss, low regain (N=52)	30.0(147.5)	272.5(168.8)	200.0(208.8)	235.0(191.3)	.001	.001	–	–
High loss, high regain (N=47)	0(140.0)	240.0(230.0)	125.0(200.0)	125.0(220.0)	.001	.004	–	–

P value corresponding to within subjects effects in repeated measures ANOVA

P value corresponding to within subjects change in linear mixed model

P value corresponding to paired t-test

Note:

Low loss, low regain: <10% loss at 6 months, <5% regain at 18 months

Low loss, high regain: <10% loss at 6 months, ≥ 5% regain at 18 months

High loss, low regain: ≥ 10% loss at 6 months, <5% regain at 18 months

High loss, high regain: ≥ 10% loss at 6 months, ≥ 5% regain at 18 months