Study Cheung et al. (2005): study HK 2001
- Public
 - Elderly, Hong Kong, 2001
 - Survey name
 - Unnamed study
 - Sample
 - Respondents
 - N = 3000
 - Non Response
 - Assessment
 - Interview: face-to-face
 
Correlate
- Authors's Label
 - Chronic Illnesses
 - Our Classification
 - 
            
 - 
                        
 - Operationalization
 - Self report on chronic illnesses:
a: Hypertension
b: Heart disease
c: Diabetes
d: Chronic obstructive pulmonary disease
e: Asthma
f: Tuberculosis
g: Stroke
h: Parkinson's disease
i: Kidney disease
j: Cataract
k: Gastric ulcer
l: Prostatis
m: Arthritis
n: Fracture
o: Gout
p: Cancer
Indicators for chronic illness were dichotomized as
1: Yes
0: No 
Observed Relation with Happiness
B's controlled for:
-age
-sex
-education
-acquiescence
-reception of public welfare
-religious faith
-living arrangemet
-marital status
-quality of life in the past years