Study Langeveld et al. (1999): study NL 1997
- Public
- 12-18 aged headache patients, The Netherlands, 1997
- Sample
- Respondents
- N = 64
- Non Response
- 15%
- Assessment
- 
        Multiple assesment methods                    
 Questionnaire and diary
Correlate
- Authors's Label
- Physical stress
- Our Classification
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- Operationalization
- Students who reported four time a day on a 5 point Likert scale
 0: no headache
 1: headache I am only aware of it
 2: Headache I can ignore it
 3: Headache I can't ignore it but can do usely activities
 4: Headache It's diffelcult to conncetrate me
 5: Hedache I can't do anything