Study Ventegodt (1997): study DK 1993

Public:

31-33 aged, born at the university hospital, Denmark, 1993

Sample:

Respondents:

N = 4626

Non Response:

36%

Assessment:

Questionnaire: paper
Data were taken from the medical files of mothers and their babies

Correlate

Authors's label

Mother's blood type

Our Classification

Operationalization

Mothers blood type. Report in medical file
a: O positive
b: O negative
c: A positive
d: A negative
e: B positive
f: B negative
g: AB positive
h: AB negative
i: AB(C?)with immunization
j: Other with immunization

Observed Relation with Happiness