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Table 2 Differences between groups at follow-up, with adjustment for baseline score

From: Effectiveness of a school-community linked program on physical activity levels and health-related quality of life for adolescent girls

Variable Group n p-value Group mean difference# Group^ n p-value Group mean differences#
     G1 - G2     G1 - G2 G1 - G3 G2 - G3
Health           
PedsQL – physical functioning 1. Intervention 340 0.005* +3.0 1. Completers 90 0.021*    +3.1
2. Control 243    2. Non-completers 250     
     3. Control 243     
PedsQL – psycho-social functioning 1. Intervention 337 0.001* +3.8 1. Completers 89 0.003*    +4.3
2. Control 242    2. Non-completers 248     
     3. Control 242     
PedsQL total score 1. Intervention 338 0.001* +3.5 1. Completers 89 0.002*    +3.9
2. Control 243    2. Non-completers 249     
     3. Control 243     
Physical activity          
 PDPAR-24: MET-mins of LTMVPA 1. Intervention 136 0.241   1. Completers 25 0.293    
2. Control 107    2. Non-completers 111     
     3. Control 107     
 PDPAR-24: Mins of LTMVPA 1. Intervention 136 0.555   1. Completers 25 0.419    
2. Control 107    2. Non-completers 111     
     3. Control 107     
Days out of past seven with at least 60 min LTMVPA 1. Intervention 351 0.132   1. Completers 89 0.152    
2. Control 255    2. Non-completers 262     
     3. Control 255     
Potential mediators          
Perceived sports competence 1. Intervention 338 0.865   1. Completers 85 0.922    
2. Control 257    2. Non-completers 253     
     3. Control 257     
Self-management strategies 1. Intervention 333 0.568   1. Completers 82 0.010* +0.25   
2. Control 246    2. Non-completers 251     
     3. Control 246     
Perceived behavioral control 1. Intervention 354 0.704   1. Completers 87 0.034* +0.27 +0.18  
2. Control 255    2. Non-completers 267     
     3. Control 255     
Outcome expectation 1. Intervention 340 0.654   1. Completers 84 0.328    
2. Control 251    2. Non-completers 256     
     3. Control 251     
Outcome expectancy-value 1. Intervention 323 0.213   1. Completers 80 0.008* +17.4 +18.4  
2. Control 192    2. Non-completers 243     
     3. Control 192     
Self-efficacy 1. Intervention 321 0.502   1. Completers 78 0.006* +0.28 +0.25  
2.Control 232    2. Non-completers 243     
     3. Control 232     
PA Enjoyment 1. Intervention 338 0.648   1. Completers 84 0.208    
2. Control 245    2. Non-completers 254     
     3. Control 245     
Sedentary enjoyment 1. Intervention 332 0.195   1. Completers 83 0.104    
2. Control 241    2. Non-completers 249     
     3. Control 241     
Personal barriers 1. Intervention 320 0.018* −0.13 1. Completers 83 0.004* +0.19   −0.18
2. Control 239    2. Non-completers 237     
     3. Control 239     
Organisation barriers 1. Intervention 320 0.909   1. Completers 83 0.113    
2. Control 241    2. Non-completers 247     
     3. Control 241     
Family support 1. Intervention 338 0.122   1. Completers 89 0.017* +0.22 +.26  
2. Control 240    2. Non-completers 249     
     3. Control 240     
Friends support 1. Intervention 340 0.345   1. Completers 90 0.048* +0.22   
2. Control 236    2. Non-completers 250     
     3. Control 238     
  1. #Significant differences between group mean scores (G) *p < 0.05.
  2. ^Completers = school component + community component; Non-completers = school component only.