Correlate as named by investigatorPeople investigatedFinding
20-59 aged, general public, Australia, 2002
Severity of disability
Disabled, Canada, 1991
25 -50 aged physically handicapped, Norway, 1984-1986
15+ aged, general public, 9 European countries, 2005
severity of impairment
Post-polio patients, California, USA, 199?
Level of injury
Spinal cord injury patients, Southern California, USA, 199?