Table 3 Estimates for multilevel regression of week day physical activity as a function of student and school characteristics (Toronto, Ontario; 2010-2011)
Model 1: intercept only | Model 2: + student variables | Model 3: + school variables | |||||||
|---|---|---|---|---|---|---|---|---|---|
Estimate | S.E. | p-value | Estimate | S.E. | p-value | Estimate | S.E. | p-value | |
Fixed effects | |||||||||
Intercept | 213.70 | 3.02 | <0.001 | 231.41 | 48.54 | <0.001 | 214.68 | 53.62 | <0.001 |
Student-level variables | |||||||||
Sex (female = 1) | -32.45 | -9.07 | <0.001 | -32.43 | -9.02 | <0.001 | |||
Age (years) | -6.88 | -3.16 | 0.002 | -7.01 | -3.00 | 0.003 | |||
Weight status (overweight/obese = 1) | -5.10 | -2.25 | 0.025 | -5.17 | -2.23 | 0.026 | |||
Parental SES (not university educated = 1) | 2.41 | 0.71 | 0.477 | 1.77 | 0.56 | 0.574 | |||
Accelerometer wear time (minutes/school week) | 0.07 | 9.63 | <0.001 | 0.07 | 9.85 | <0.001 | |||
School-level variables | |||||||||
Support for active transportation to/from school | |||||||||
Actiona | 17.33 | 5.16 | <0.001 | ||||||
Maintenancea | 5.11 | 1.41 | 0.159 | ||||||
Presence of written policies/practices for PA | |||||||||
Actiona | 13.84 | 2.66 | 0.008 | ||||||
Maintenancea | 6.32 | 1.22 | 0.224 | ||||||
Random effects | |||||||||
School-level variance | 125.95 | 45.52 | 0.006 | 142.63 | 4.18 | <0.001 | 52.11 | 1.87 | 0.061 |
Student-level variance | 1731.90 | 93.47 | <0.001 | 1319.97 | 18.44 | <0.001 | 1320.95 | 18.48 | <0.001 |
Intraclass correlation | 0.067 | ||||||||