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Table 2 Study 1: Separate models examining estimated odds ratios for self-reported physical activity outcomes adjusting for student characteristics

From: Examining the impact of a province-wide physical education policy on secondary students’ physical activity as a natural experiment

Survey Data Model 1–30 min/day Model 2–60 min/day Model 3 – KKD
     Active vs Inactive Moderately Active vs Inactive
Fixed effect (95% CI) P value Fixed effect (95% CI) P value Fixed effect (95% CI) P value Fixed effect (95% CI) P value
Study Condition
 Comparison (PEI) Referent <.0001 Referent <.0001 Referent 0.23 Referent 0.32
 Intervention (Manitoba) 2.24 (1.88, 2.66)   1.32 (1.16, 1.50)   1.16 (0.91,1.48)   1.13 (0.89, 1.45)  
Time
 Baseline Referent   Referent   Referent   Referent  
 Follow-up 0.79 (0.65, 0.95) 0.01 0.95 (0.82, 1.10) 0.49 1.13 (0.84, 1.51) 0.41 1.15 (0.86, 1.52) 0.35
Condition*Time Interaction 1.13 (0.92, 1.39) 0.24 0.92 (0.78, 1.07) 0.26 0.63 (0.47, 0.85) 0.0021 0.82 (0.61, 1.11) 0.20
Grade
 9 Referent   Referent   Referent   Referent  
 10 0.91 (0.82, 1.00) 0.05 0.91 (0.86, 0.97) 0.0016 0.84 (0.75, 0.93) 0.0008 0.92 (0.82, 1.02) 0.12
 11 0.75 (0.68, 0.82) <.0001 0.73 (0.69, 0.77) <.0001 0.58 (0.52, 0.64) <.0001 0.81 (0.73, 0.90) <.0001
 12 0.66 (0.60, 0.73) <.0001 0.68 (0.64, 0.72) <.0001 0.52 (0.47, 0.57) <.0001 0.80 (0.72, 0.89) <.0001
Sex
 Female Referent <.0001 Referent < .0001 Referent < .0001 Referent <.0001
 Male 1.87 (1.74, 2.00) 1.88 (1.80, 1.95)   2.26 (2.10, 2.43)   1.29 (1.20, 1.39)  
BMI status
 Healthy weight Referent 0.0007 Referent 0.0006 Referent < .0001 Referent 0.20
 Overweight or obese 0.88 (0.81, 0.95)   0.92 (0.88, 0.97)   0.85 (0.78, 0.92)   0.95 (0.87, 1.03)  
  1. Note: Fixed effects of intercepts for each model are not shown. 95% confidence intervals are shown in parentheses. Referent categories are identified as “Referent”