Outcome measures in older persons with acquired joint contractures: a systematic review and content analysis using the ICF (International Classification of Functioning, Disability and Health) as a reference

Table 7 Relative frequency of 2nd level ICF categories. Environment (e)

ICF code	ICF category	% (95 % CI)
	ICF Chapter Support and Relationships
e310	Immediate family	7 (1.8 to 16.2)
e315	Extended family	7 (1.8 to 16.2)
e320	Friends	7 (1.8 to 16.2)
e399	Support and relationships, unspecified	20 (10.8 to 32.3)
	ICF Chapter Products and Technology
e120	Products and technology for personal indoor and outdoor mobility and transportation	45 (32.1 to 58.4)
e155	Design, construction and building products and technology of buildings for private use	37 (24.6 to 50.1)

Values are percentages (95 % CI); the denominator is the number of studies included (n = 60). ICF categories referring to concepts measured in more than 5 % of the studies are reported

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