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Table 3 Characteristics of the participants

From: A population-based nested case control study on recurrent pneumonias in children with severe generalized cerebral palsy: ethical considerations of the design and representativeness of the study sample

   % valid*
GMFCS score V 82.7 0.95
Can communicate "yes" and "no" 20.6 0.87
Can verbally communicate "yes" and "no" 3.1 0.87
Living with parents at home 81.4 1
Intentional movements none 34.8  
  little 27.9  
  regularly 37.7 0.66
Involuntary movements most of the day 29.6  
  regularly 35.2  
  < 2 hours a week 35.2 0.64
Seated > 3 hours / day 84.5 0.68
Standing < 30 minutes / week 38.3 0.59
Activity < 30 min / day 51.3 0.58
  1. GMFCS = Gross Motor Function Classification Scale, *valid = fraction of the population with known information