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

Age of first holding head up

Our Classification

Distribution

N all:2547,   1:9.7%,   2:61,4%,   3:25,5%,   4:2,9%,   5:0,4%,   6:0,2%

Operationalization

Age of first holding head up as reported in medical file
1: 1-2 weeks
2: 3-4 weeks
3: 5-6 weeks
4: 7-8 weeks
5: 3-4 months
6: later than 4 months

Observed Relation with Happiness