Study Langeveld (1998): study NL 1993
- Public:
- 12-18 aged migraine patients and controls, followed 26 months, The Netherlands, 199?
- Sample:
- Respondents:
- N = 159
- Non Response:
- at T0: 4%
- Assessment:
- Questionnaire: paper
Correlate
- Authors's label
- Headache vs no headache
- Our Classification
-
-
- Operationalization
- 1: headache
1a: migraine headache
1b: no migraine headache
0: controls
Observed Relation with Happiness
Happiness assessed at:
- T0: baseline
- T1: one week after Week 0 completion
- T2: two weeks after Week 0
- T3: three weeks after Week 0
- T4: 26 weeks after Week 0