Comparison (Alberta) (n=224) | Intervention (Manitoba) (n =447) | Total (n = 671) | |||||
---|---|---|---|---|---|---|---|
Accelerometer data | n | (%) | n | (%) | n | (%) | P value |
Students with valid MVPA at time point | |||||||
T0: Pre-policy | 224 | (100.0) | 447 | (100.0) | 671 | (100.0) | N.A. |
T1: February 2009 – June 2009 | 120 | (53.6) | 167 | (37.4) | 287 | N.A. | |
T2: September 2009 – January 2010 | 20 | (8.9) | 94 | (21.0) | 114 | (42.8) | N.A. |
T3: February 2010 – June 2010 | 67 | (29.9) | 232 | (51.9) | 299 | (17.0) | N.A. |
T4 : September 2010 – January 2011 | 21 | (9.4) | 54 | (12.1) | 75 | (44.6) | N.A. |
T5 : February 2011 – June 2011 | 0 | (0) | 124 | (27.7) | 124 | (11.2) | N.A. |
T6 : September 2011 – January 2012 | 14 | (6.3) | 44 | (9.8) | 58 | (18.5) (8.6) | N.A. |
Times points contributed/ student, mean ± SD | 2.1 | 0.8 | 2.6 | 1.1 | 2.4 | 1.0 | <.0001* |
Baseline MVPA | |||||||
Students with baseline data | 224 | (100.0) | 447 | (100.0) | 671 | (100.0) | N.A. |
Minutes/day, mean ± SD | 53.0 | 21.9 | 58.3 | 24.0 | 56.5 | 0.0039† | |
Accumulated ≥ 30 min/day | 194 | (86.6) | 396 | (88.6) | 590 | 23.4 | |
Accumulated ≥ 60 min/day | 76 | (33.9) | 199 | (44.5) | 275 | (87.9) (41.0) | 0.4571† 0.0085† |
MVPA at students’ last follow-up | |||||||
Students with ≥ 1 follow up data | 165 | (73.7) | 340 | (76.1) | 505 | (75.3) | 0.4965† |
Minutes/day, mean ± SD | 49.4 | 22.2 | 44.1 | 23.7 | 45.8 | 23.3 | 0.0143* |
Accumulated ≥ 30 min/day (% with ≥ 1 follow up) | 131 | (79.4) | 231 | (67.9) | 362 | (71.7) | 0.0074† |
Accumulated ≥ 60 min/day (% with ≥ 1 follow up) | 48 | (29.1) | 71 | (20.9) | 119 | (23.6) | 0.0415† |
MVPA change from baseline to last follow up | |||||||
Change (min/day), mean ± SD | -3.7 | 25.3 | -13.4 | 26.2 | -10.3 | 26.3 | <.0001* |
Mean percentage change (%), mean ± SD | 14.2 | 130.5 | -15.9 | 49.6 | -6.1 | 86.0 | 0.0047* |