Correlate as named by investigatorPeople investigatedFinding
problems as challenge
18-88 aged, general public, Denmark, 1993
problems as challenges
31-33 aged, Denmark 1993, born in University Hospital in Copenhagen
cumulation of problems
18+ aged, general public, Germany, 1984
Suffering from any highly problematic circumstance
Exercisers and non-exercisers, Spain, 200?
Difficulties with housing costs
55-95 aged, Northern Interior Health Region, British Columbia, Canada, 1999
16+ aged, general public, UK, 2000
Community dwelling seniors, Vancouver, Canada, 1987-88
15+ aged, general public, 160 nations, 2005-2015
18+ aged, general public, Germany, 2010
Transsexuals, in treatment and after treatment, Netherlands, 198?