Correlational findings

Study Langeveld (1998): study NL 1993

12-18 aged migraine patients and controls, followed 26 months, The Netherlands, 199?
N = 159
Non Response
at T0: 4%
Questionnaire: Paper & Pencil Interview (PAPI)


Authors's Label
Headache vs no headache
Our Classification
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
1:  headache
1a: migraine headache
1b: no migraine headache
0:  controls

Observed Relation with Happiness

Happiness Measure Statistics Elaboration / Remarks O-SLW-cw-sq-ol-11-a = CHANGE in Happiness O-SLW-cw-sq-ol-11-a = .12 p < .000 Linear Time Effect T0-T3 O-SLW-cw-sq-ol-11-a = .02 ns not stronger among headache patients

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