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

Presence of headache prior to completion of QLH-Y

Our Classification

Operationalization

Satisfaction with Life in general

Observed Relation with Happiness