| Variables | No. (%) |
| Age (year), mean ±SD (range) | 32.8±8.7 (18 – 75) |
| Age group (year) | |
| <25 | 173 (20.0) |
| 25 – 44 | 595 (68.8) |
| ≥45 | 97 (11.2) |
| Gender | |
| Male | 318 (34.8) |
| Female | 595 (65.2) |
| Nationality | |
| Kuwaiti | 784 (85.8) |
| Non-Kuwaiti | 130 (14.2) |
| Education level | |
| High school or below | 128 (14.0) |
| Diploma | 356 (38.9) |
| Bachelor or more | 430 (47.0) |
| Family income (KD) | |
| <1,000 | 264 (29.0) |
| 1,000 – 1,499 | 323 (35.5) |
| 1,500 – 1,999 | 134 (14.7) |
| ≥2,000 | 188 (20.7) |