Table 4.

Cross-Classification Matrix by Quartiles at Baseline and the Average Over 2-3 Years

	Quartiles for mean of Times 2 and 3
Quartiles at baseline	1	2	3	4	Total	Percent agreement
Total counts
1	35	14	2	1	52
2	14	23	12	3	52
3	3	13	24	13	53
4	0	2	15	35	52
Total	52	52	53	52	209	56.0%
Sedentary time
1	35	13	3	1	52
2	13	15	21	3	52
3	4	20	18	11	53
4	0	4	11	37	52
Total	52	52	53	52	209	50.2%
Light intensity activity
1	37	12	1	2	52
2	11	22	17	2	52
3	4	17	20	12	53
4	0	1	15	36	52
Total	52	52	53	52	209	55.0%
MVPA time
1	34	13	5	1	53
2	15	23	12	1	51
3	3	12	25	13	53
4	0	4	11	37	52
Total	52	52	53	52	209	56.9%

Notes: Bolded values indicate classified in the same quartile at both-time points and italicized are within one quartile.

^aSummation of VM cpm over the daily wear period. Baseline: Q1 <358,112; Q2 358,112 to <483,187; Q3: 483,187 to <582,059.8 Q4: ≥582,059.8. Time 2/3: Q1 <362,598; Q2 362,598 to <450,051.4; Q3: 450,051.4 to <559,695.8 Q4: ≥559,695.8.

^bSedentary time is defined as the daily sum of minutes during which the accelerometer registers VM cpm <200.¹⁹ Baseline: Q1 <455.1 min; Q2: 455.1 to <509.2 min; Q3: 509.2 to 580.3 min Q4: ≥580.3 min. Time 2/3: Q1 <451 min; Q2: 451 to <506.3 min; Q3: 506.3 to 566.4 min Q4: ≥566.4 min.

^cLight-intensity physical activity min is defined the daily sum of minutes during which the accelerometer registers VM cpm between 200 and 2690.²⁰ Baseline Q1: <296.6 min; Q2: 296.6 to <351.9 min; Q3: 351.9 to <414.0 min Q4: ≥414.0 min. Time 2/3 Q1: <290.1 min; Q2: 290.1 to <343.8 min; Q3: 343.8 to <396.6 min Q4: ≥396.6 min.

^dMVPA time is defined the daily sum of minutes during which the accelerometer registers VM cpm >=2,691.²⁰ Baseline: Q1 <9.0 min; Q2: 9 to <21 min; Q3: 21 to <46.0 min Q4: ≥46.0 min. Time 2/3: Q1 <8.3 min; Q2: 8.3 to <19.1 min; Q3: 19.1 to <36.4 min Q4: ≥36.4 min.

MVPA, moderate to vigorous physical activity; VM, vector magnitude; cpm, counts per minute