Table 3.
Accelerometer outcomes calculated based on different definitions of a valid day and equivalence results
| Minimum daily wear time criteria (h) | Mean (95% CI) | Mean Difference | Standard Error | 90% CI around mean difference | |
|---|---|---|---|---|---|
| Lower | Upper | ||||
| counts.day− 1 | |||||
|
≥ 10 h (EI: ± 11,170) |
111,695 (90,870, 132,520) |
n/a | n/a | n/a | n/a |
| ≥ 9 h |
109,297 (88,545, 130,049) |
2398 | 3864 | − 7563 | 12,359 |
| ≥ 8 h |
107,976 (87,262, 128,690) |
3719 | 3821 | − 6132 | 13,569 |
| ≥ 7 h |
107,569 (86,870, 128,269) |
4126 | 3802 | − 5676 | 1392 |
| ≥ 6 h |
107,054 (86,364 127,744) |
4641 | 3789 | − 5127 | 14,409 |
| counts.minute−1 (cpm) | |||||
|
≥ 10 h (EI: ± 14) |
140 (114, 166) |
n/a | n/a | n/a | n/a |
| ≥ 9 h |
140 (113, 166) |
0 | 4 | −10 | 11b |
| ≥ 8 h |
139 (113, 165) |
1 | 4 | −10 | 11b |
| ≥ 7 h |
139 (113,166) |
1 | 4 | −10 | 11b |
| ≥ 6 h |
139 (113,165) |
1 | 4 | −10 | 11b |
| PA time (h and min) | |||||
|
≥ 10 h (EI: ± 14 min) |
2 h 20 min (1 h 58 min, 2 h 41 min) |
n/a | n/a | n/a | n/a |
| ≥ 9 h |
2 h 17 min (1 h 55 min, 2 h 38 min) |
3 min | 3 min | - 6 min | 12 minb |
| ≥ 8 h |
2 h 15 min (1 h 53 min, 2 h 36 min) |
5 min | 3 min | - 4 min | 14 minb |
| ≥ 7 h |
2 h 14 min (1 h 52 min, 2 h 36 min) |
6 min | 3 min | - 3 min | 14 minb |
| ≥ 6 h |
2 h 13 min (1 h 52 min, 2 h 35 min) |
6 min | 3 min | - 2 min | 15 min |
| SB time (h and min) | |||||
|
≥ 10 h (EI: ± 65 min) |
10 h 54 min (10 h 25 min, 11 h 20 min) |
n/a | n/a | n/a | n/a |
| ≥ 9 h |
10 h 41 min (10 h 14 min, 11 h 8 min) |
12 min | 7 min | - 6 min | 30 minb |
| ≥ 8 h |
10 h 35 min (10 h 8 min, 11 h 2 min) |
17 min | 7 min | - 1 min | 35 minb |
| ≥ 7 h |
10 h 31 min (10 h 4 min, 10 h 58 min) |
21 mina | 7 min | 4 min | 39 minb |
| ≥ 6 h |
10 h 29 min (9 h 59 min, 10 h 53 min) |
26 mina | 7 min | 8 min | 44 minb |
Notes: Accelerometer outcomes are: counts.day− 1, counts.minute− 1, PA time and SB time. Mean difference from the 10 h reference point. a denotes that the mean difference from the estimates based on 10 h wear time criteria is significant at the 0.05 level. Bonferroni correction applied. Equivalence interval = ± 10% of mean value when the minimum daily WT of ≥10 h was used. For counts.day− 1 = 11,170 count.day− 1; counts.minute− 1 = 14 count.minute− 1; PA time = 14 min; SB time = 65 min. b indicates equivalency
Abbreviations: EI equivalency interval; cpm counts per minute; PA physical activity; SB sedentary behaviour