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Table 2 Comparison of all children observed on schoolyards at LL and control schools during different utilization periods, reported as number of children per 100 children enrolled in the school

From: An assessment of schoolyard renovation strategies to encourage children's physical activity

  Mean usage, Learning Landscapes Mean usage, unrenovated schoolyards Mean difference Standard error difference p
All periods      
All children 14.5 9.8 4.6 1.7 **.008
Boys 7.7 5.3 2.4 1.1 *.023
Girls 6.8 4.5 2.3 0.8 **.008
Before School      
All children 22.3 10.8 11.5 6.0 .066
Boys 12.7 6.4 6.3 3.7 .106
Girls 9.6 4.4 5.3 2.4 *.040
Lunch Recess      
All children 27.4 20.8 6.6 2.4 **.007
Boys 14.4 10.9 2.8 1.3 **.007
Girls 13.0 9.9 3.1 1.3 *.016
After School      
All children 4.2 2.1 2.1 0.8 *.007
Boys 2.0 1.2 0.8 0.4 .065
Girls 2.2 0.8 1.3 0.3 **.001
Weekends      
All children 0.8 0.2 0.6 0.3 *.068
Boys 0.5 0.1 0.4 0.2 *.025
Girls 0.2 0.1 0.2 0.1 .083
  1. * p < .05 ** p < .01