| Publication |
| Author(s) | Pitkälä, K.H.; Laakkonen, M.L.; Strandberg, T.E. |
| Title | Positive Life Orientation as a Predictor of 10-Year Outcome in an Aged Population. |
| Source | Journal of Clinical Epidemiolgy, 2004, Vol. 57, 409 - 414 |
| DOI | DOI:10.1016/j.jclinepi.2003.07.013 |
| Investigation |
| Public | 75-85 aged, Helsinki, Finland followed 1989-1999, ( T1 1989, T2 1994, T3 1999) |
| | T1 1989, T2 1994, T3 1999 |
| Survey name | Not available |
| | Helsinki Aging Study |
| Sample | Probability stratified sample |
| | Random samples of persons aged 75, 80 and 85 |
| Respondents N = | 491 |
| Non Response | 18% |
| | Non-response at T1 24,6%. Incomplete responses (6,6%) left out |
| Assesment | Interview: face-to-face |
| | Also postal questionnaire and clininal examination. |
| Happiness measure(s) used |