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Table 2 Physical activity

From: A 3-year school-based exercise intervention improves muscle strength - a prospective controlled population-based study in 223 children

  Girls Boys
  Cases (n = 47) Controls (n = 46) P- value Cases (n = 76) Controls (n = 54) P- value
Baseline
Organized physical activity before study start (hours/week)       
   Total physical activity 1.7 (0.7) 2.4 (1.7) 0.02 2.7 (1.6) 2.3 (1.3) 0.18
Organized physical activity after study start (hours/week)       
   School curriculum 3.3 1.0 <0.001 3.3 1.0 <0.001
   Outside School 0.7 (0.7) 1.4 (1.7) 0.02 1.7 (1.6) 1.3 (1.3) 0.18
   Total physical activity 4.0 (0.7) 2.4 (1.7) <0.001 5.0 (1.6) 2.3 (1.3) <0.001
Follow-up (after 3 years)
Organized physical activity (hours/week)       
   School curriculum 3.3 1.0 <0.001 3.3 1.0 <0.001
   Outside School 2.3 (2.0) 2.8 (2.5) 0.38 3.3 (3.3) 2.9 (2.4) 0.50
   Total physical activity 5.6 (2.0) 3.8 (2.5) <0.001 6.6 (3.3) 3.9 (2.4) <0.001
  1. Baseline and follow-up physical activity data in the subsample of girls and boys who were measured. Questionnaire-evaluated duration of organized physical activity was estimated as mean hours per week. Data are presented as mean with standard deviation (SD). Statistically significant group differences are bolded.