Study Perquin (2002): study NL 1976
- Public
 - 12-18 aged, in chronic pain. Rotterdam, Netherlands, followed 2 years, 1996-99
 - Sample
 - Respondents
 - N = 5336
 - Non Response
 - 8%
 - Assessment
 - 
        Multiple assesment methods                    
Mailed questionnaire and diary. Subjects and their parents were sent a pain booklet and additional questionnaires. Adolescents were instructed to keep the pain diary to their own. 
Correlate
- Authors's Label
 - Satisfaction with life in general
 - Our Classification
 - 
            
 - 
                        
 - Distribution
 - N = T1: 245, T2: 150, T3: 118
 - Operationalization
 - T1: June 1974
T2: June 1998
T3: June 1999 
Observed Relation with Happiness
T1 62,2 24,2
T2 66,0 25,4
T3 64,6 21,8
Difference
T1-T2 +3,8
T1-T3 -2,4