Table 1 Characteristics of the study population
From: Classical test theory versus Rasch analysis for quality of life questionnaire reduction
ALL n = 9,419 | MALES n = 4,478† | FEMALES N = 4,908† | |
|---|---|---|---|
Gender (%) | 47.5 | 52.1 | |
Age groups (%) | |||
12 – 44 | 24.5 | 23.1 | 26.0 |
45 – 54 | 14.9 | 15.5 | 14.5 |
55 – 64 | 18.9 | 21.6 | 16.5 |
65 – 74 | 24.6 | 25.6 | 23.7 |
75 – 99 | 16.7 | 14.1 | 19.2 |
Study populations | |||
General population | 40.8 | 38.0 | 43.5 |
Primary care patients | 7.4 | 4.5 | 10.0 |
Musculoskeletal system & connective tissue diseases | 9.2 | 5.5 | 12.7 |
COPD/Asthma | 9.2 | 14.0 | 4.8 |
Toxic Oil Syndrome | 8.9 | 6.5 | 11.2 |
Chronic Kidney Failure | 7.6 | 9.4 | 6.0 |
Cardiovascular diseases | 3.2 | 5.5 | 0.9 |
Others | 13.8 | 16.6 | 10.9 |