Study Feller et al. (2013): study DE 1994

Public

35-65 aged, general population, Germany, followed 4 years1994-2008

Survey name

EU-EPIC (Europ. Prospective Investigation into Cancer and Nutrition) 1994-1998

Sample

Respondents

N = 48976

Non Response

Assessment

Interview: face-to-face
Baseline instruments to collect several aspects on diet and life-style included self-administered questionnaires, PC-guided interviews and physical examinations

Correlate

Authors's Label

Smoking

Our Classification

Operationalization

0 non-smoker
1 former smoker
2 current smoker

Observed Relation with Happiness