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

Table 3 Characteristics of the participants

		%	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

GMFCS = Gross Motor Function Classification Scale, *valid = fraction of the population with known information

ISSN: 1471-2431