Table 1. Baseline Characteristics.
| Variable | Total No. (No. in intervention) | Control, mean (SD) | Intervention, mean (SD) | Total, mean (SD) |
|---|---|---|---|---|
| Student-level variables | ||||
| Cardiorespiratory fitness (20-m shuttle laps) | 1188 (557) | 25.83 (14.95) | 22.84 (13.43) | 24.43 (14.33) |
| Girls, % | 1209 (569) | 49.06 (NA) | 49.74 (NA) | 49.38 (NA) |
| Age, y | 1190 (554) | 8.89 (0.70) | 8.81 (0.73) | 8.85 (0.71) |
| BMI | 1186 (552) | 18.14 (3.09) | 18.23 (3.58) | 18.18 (3.32) |
| BMI-z | 1174 (547) | 0.44 (1.02) | 0.42 (1.11) | 0.43 (1.06) |
| Obese/overweight status, % | 1174 (547) | 27.11 (NA) | 28.88 (NA) | 27.94 (NA) |
| Immigrant status, % | 1208 (568) | 15.62 (NA) | 26.58 (NA) | 20.78 (NA) |
| Indigenous (Aboriginal/Torres Strait Islander), % | 1206 (569) | 9.06 (NA) | 8.61 (NA) | 8.85 (NA) |
| Wealth statusa | 1196 (557) | 2.45 (0.84) | 2.45 (0.84) | 2.45 (0.84) |
| Books in homeb | 1196 (557) | 3.05 (1.14) | 2.99 (1.23) | 3.02 (1.18) |
| School-level variables | ||||
| Index of Community Socio-Educational Advantage score | 22 (11) | 986.3 (58.3) | 1006 (56) | 996.3 (56.7) |
| School size (students in kindergarten-grade 6) | 22 (11) | 294.18 (266.9) | 253.63 (190.49) | 273.91 (227.23) |
| Previous participation in the Live Life Well at School Program, %c | 22 (11) | 90.91 (NA) | 100 (NA) | 95.45 (NA) |
| NAPLAN Numeracy school mean score | 22 (11) | 445.95 (54.48) | 436.91 (49.23) | 441.42 (50.5) |
| NAPLAN Literacy school mean score | 22 (11) | 452.73 (54.62) | 447.86 (44.94) | 450.3 (49.5) |
| Urban location, % | 22 (11) | 63.64 (NA) | 72.73 (NA) | 68.18 (NA) |
| Length of school day, min | 22 (11) | 361.31 (2.24) | 358.2 (4.61) | 359.75 (3.88) |
| Time allocated to recess/lunch breaks per day, min | 22 (11) | 73.70 (5.58) | 68.72 (8.19) | 71.21 (7.21) |
| Schools with a dedicated physical education teacher, % | 20 (10) | 30.00 (NA) | 0 (NA) | 15.00 (NA) |
Abbreviations: BMI, body mass index (calculated as weight in kilograms divided by height in meters squared); BMI-z, BMI z score; NAPLAN, National Assessment Program–Literacy and Numeracy; NAPLAN Literacy, combination of reading, writing, spelling and grammar scores.
a
Wealth status measured on scale from 1 to 5, with 1 indicating very wealthy and 5 indicating not at all wealthy.
b
Books in the home measured on scale from 1 to 5, with 1 indicating none or very few (0-10) books and to 5 indicating enough to fill 3 or more bookcases (more than 200 books).
c
Live Life Well at School was a statewide physical activity and nutrition program delivered in New South Wales from 2008 to 2015.