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 & Pencil Interview (PAPI)

Correlate

Authors's Label

Headache vs no headache

Our Classification

Remarks

Headache or migraine subgroup: a. headache symptoms which were present and diagnosed by a physician as 'migraine'or which were considered by the subjects to resemble the symptoms in the migraine description b. if the headache frequency was at least twice a month c. if the headaches had been present for at least one year

Operationalization

1:  headache
1a: migraine headache
1b: no migraine headache
0:  controls

Observed Relation with Happiness