Table 1.
Baseline characteristics by study
| Study 1: Survey data | Comparison (PEI) (n = 2258) | Intervention (Manitoba) (n = 33,619) | P value | ||
| Age (years), mean ± SD | 15.8 | 0.71 | 15.7 | 0.82 | <.0001* |
| n | % | n | % | ||
| Grade | |||||
| 9 | 576 | (25.5) | 9070 | (27.0) | 0.0005† |
| 10 | 591 | (26.2) | 9216 | (27.4) | |
| 11 | 543 | (24.0) | 8438 | (25.1) | |
| 12 | 548 | (24.3) | 6895 | (20.5) | |
| Sex | |||||
| Female | 1053 | (46.6) | 16,846 | (50.1) | <.0001† |
| Male | 1094 | (48.4) | 16,773 | (49.9) | |
| Missing | 111 | (4.9) | - | - | |
| BMI status | |||||
| Healthy weight | 1252 | (55.4) | 21,505 | (64.0) | <.0001† |
| Overweight or obese | 468 | (20.7) | 7107 | (21.1) | |
| Missing | 538 | (23.8) | 5007 | (14.9) | |
| Study 2: Accelerometer data | Comparison (Alberta) (n = 224) | Intervention (Manitoba) (n = 447) | P value | ||
| Age (years), mean ± SD | 13.5 | 0.71 | 15.2 | 0.82 | <.0001* |
| n | % | n | % | ||
| Sex | |||||
| Female | 133 | (59.4) | 239 | (54.0) | 0.1828† |
| Male | 91 | (40.6) | 204 | (46.1) | |
| BMI status | |||||
| Healthy weight | 175 | (78.1) | 228 | (51.0) | <.0001† |
| Overweight or obese | 49 | (21.9) | 61 | (13.7) | |
| Missing | - | - | 158 | (35.4) | |
| School location | 0.0181† | ||||
| Urban | 137 | (61.2) | 314 | (70.3) | |
| Rural | 87 | (38.8) | 133 | (29.8) | |
| School Socioeconomic status | <.0001† | ||||
| High | 186 | (83.0) | 139 | (31.1) | |
| Low | 38 | (17.0) | 308 | (68.9) | |
Note: For accelerometer data, missing categories that constitute less than 5% of the sample were omitted from the table. Therefore, counts may not add up to their respective totals
*Student’s t-test was used to compare across study condition
†Chi-square test was used to compare across province