Table 1.
Baseline characteristics for participants in the analytical sample per intervention group (Control, PA-I, SB-I and PA + SB-I)
| Control | N | PA-I | N | SB-I | N | PA + SB-I | N | |
|---|---|---|---|---|---|---|---|---|
| Demographics (mean [SD]) | ||||||||
| N (%) | 61 (22.8%) | 61 | 82 (30.7%) | 82 | 64 (24.0%) | 64 | 60 (22.5%) | 60 |
| Age, years | 8.6 (0.3) | 61 | 8.7 (0.4) | 82 | 8.8 (0.4) | 64 | 8.8 (0.3) | 60 |
| Sex (n [%]) | 61 | 82 | 64 | 60 | ||||
| Girls | 34 (56%) | 45 (55%) | 42 (66%) | 28 (47%) | ||||
| Boys | 27 (44%) | 37 (45%) | 22 (34%) | 32 (53%) | ||||
| Socio-economic status (n [%]) | 61 | 82 | 64 | 60 | ||||
| High | 0 (0%) | 0 (0%) | 0 (0%) | 9 (15%) | ||||
| Mid | 38 (62%) | 50 (61%) | 39 (61%) | 36 (60%) | ||||
| Low | 23 (38%) | 32 (39%) | 25 (39%) | 15 (25%) | ||||
| Adiposity markers (mean [SD]) | ||||||||
| Body mass index, kg/m2 | 17.5 (2.8) | 61 | 17.2 (3.0) | 79 | 17.5 (2.5) | 64 | 17.5 (2.5) | 60 |
| Waist circumference, cm | 58.8 (6.8) | 61 | 59.3 (7.2) | 79 | 59.9 (6.0) | 64 | 60.5 (5.7) | 60 |
| Accelerometry (mean [SD]) | ||||||||
| Valid weekend days (n [%])a | 61 | 82 | 64 | 60 | ||||
| No weekend day | 3 (4.9%) | 7 (8.5%) | 3 (4.7%) | 7 (11.7%) | ||||
| ≥ 1 weekend day | 58 (95.1%) | 75 (91.5%) | 61 (95.3%) | 53 (88.3%) | ||||
| Total SED, min | 399.3 (56.0) | 61 | 397.6 (60.2) | 82 | 395.3 (58.5) | 64 | 404.4 (67.6) | 60 |
| Total LPA, min | 228.6 (34.2) | 61 | 227.1 (31.3) | 82 | 230.2 (37.6) | 64 | 227.2 (36.0) | 60 |
| Total MPA, min | 57.0 (11.7) | 61 | 53.3 (11.9) | 82 | 53.6 (11.8) | 64 | 58.0 (15.3) | 60 |
| Total VPA, min | 27.3 (12.0) | 61 | 24.3 (10.3) | 82 | 25.1 (13.0) | 64 | 30.1 (15.7) | 60 |
| Time in SED bouts, minb | 140.0 (40.4) | 61 | 138.9 (47.4) | 82 | 136.9 (49.2) | 64 | 148.8 (54.0) | 60 |
| Time in LPA bouts, minb | 96.3 (23.1) | 61 | 96.0 (20.0) | 82 | 98.3 (25.9) | 64 | 95.0 (23.7) | 60 |
| Time in MPA bouts, minb | 9.8 (4.1) | 61 | 8.5 (3.7) | 82 | 8.2 (3.4) | 64 | 8.8 (4.6) | 60 |
| Time in VPA bouts, minb, c | 7.2 (6.4) | 61 | 6.0 (4.0) | 82 | 6.8 (6.4) | 64 | 8.9 (9.1) | 60 |
| MVPA (n [%])c | 61 | 82 | 64 | 60 | ||||
| < 60 min/day | 6 (9.8%) | 14 (17.1%) | 14 (21.9%) | 9 (15.0%) | ||||
| ≥ 60 min/day | 55 (90.2%) | 68 (82.9%) | 50 (78.1%) | 51 (85.0%) | ||||
The analytical sample (total n = 267) comprised of participants with complete valid accelerometry and covariates data
Abbreviations: PA-I Physical activity intervention group, SB-I Sedentary behaviour intervention group, PA + SB-I Combined physical activity and sedentary behaviour intervention group, SD Standard deviation, SED Sedentary time, LPA Light-intensity physical activity, MPA moderate-intensity physical activity, VPA vigorous-intensity physical activity, MVPA moderate- to vigorous-intensity physical activity
aValid days were set at a minimum of 8 h on weekdays and 7 h on weekend days
bTime in each intensity was divided into sporadic time and time in bouts, using < 5 min and ≥ 5 min for sedentary time, and < 1 min and ≥ 1 min for physical activity (including LPA, MPA and VPA), respectively
cValues presented before zero replacement
dBased on the average MVPA across included valid days