Study Pitkälä et al. (2004): study FI 1989

Public

75-85 aged, Helsinki, Finland followed 1989-1999, ( T1 1989, T2 1994, T3 1999)

Sample

Respondents

N = 491

Non Response

18%

Assessment

Interview: face-to-face
Also postal questionnaire and clininal examination.

Correlate

Authors's Label

Age

Our Classification

Distribution

N = 1: 193, 2: 165, 3: 133

Operationalization

1: 75 year-olds
2: 80-year olds
3: 85-year olds

Observed Relation with Happiness