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Table 2 Forced Expiratory Volume in 1 sec (FEV 1 ) in three times of evaluation according to the age (≤10 years and >10 years), age of onset of steroid therapy (≤7 years and >7 years), and walking capacity (ambulant and non-ambulant)

From: Lung function monitoring in patients with duchenne muscular dystrophy on steroid therapy

   FEV1(L/%)   
  Evaluation I Evaluation II Evaluation III  
Age (≤10 years) 1.3 ± 0.3/72.5 ± 17.14 1.5 ± 0.5/77.4 ± 20.8 1.3 ± 0.4/69.1 ± 22 p1 = 0.35/0.43
n = 9     p2 = 0.16/0.17
Age (>10 years) 1.5 ± 0.4/64.3 ± 20.6 1.5 ± 0.3/64.5 ± 22.5 1.5 ± 0.3/61.8 ± 22.3 p3 = 0.13/0.16
n = 12     
Age of onset of steroid 1.3 ± 0.3 / 71.6 ± 19.1 1.5 ± 0.5 / 76.2 ± 24.8 1.4 ± 0.5 / 72.1 ± 26.6 p1 = 0.32/0.38
therapy (≤7 years)     p2 = 0.05/0.22
     p3 = 0.18/0.18
n = 10     
Age of onset of steroid 1.5 ± 0.4 / 64.3 ± 19.6 1.5 ± 0.3 / 64.3 ± 19 1.4 ± 0.2 / 58.5 ± 15.2  
therapy (>7 years)     
n = 11     
Ambulant 1.4 ± 0.3 / 80.4 ± 13.9 1.6 ± 0.4 / 87.8 ± 15.9 1.6 ± 0.3 / 82.1 ± 19.1 p1 = 0.42/0.41
     p2 = 0.18/0.98
n = 9     p3 = 0.50/0.38
Non-ambulant 1.4 ± 0.4 / 58.3 ± 17.5 1.4 ± 0.4 / 56.7 ± 16.1 1.3 ± 0.3 / 52.2 ± 13.9  
n = 12     
  1. Table legend: p1 = comparison between the three evaluations, p2 = comparison between both groups, p3 = interaction effect.