Table 1. Demographics of the study population. Data are presented as number of subjects (percentage in parenthesis) unless otherwise stated.
| Characteristic | N = 987 |
|---|---|
| Demographics | |
| Mean age, yrs (±SD) | 34.0 ± 13.4 |
| Male | 331 (34%) |
| Female | 656 (66%) |
| Asian | 987 (100%) |
| Region of main residency | |
| Seoul | 134 (14%) |
| Gyeonggi-do | 235 (24%) |
| Jeolla-do | 200 (20%) |
| Chungcheong-do | 199 (20%) |
| Gyeongsang-do | 187 (19%) |
| Other | 32 (3%) |
| Region of main residency same as region of site | 872 (88%) |
| Age group (years) | |
| ≥ 11-19 | 198 (20%) |
| > 19-29 | 198 (20%) |
| > 29-39 | 197 (20%) |
| > 39-49 | 197 (20%) |
| > 49-55 | 197 (20%) |
| Highest level of education obtained | |
| No previous schooling | 1 (<1%) |
| Elementary school | 55 (6%) |
| Middle school | 86 (9%) |
| High school | 210 (21%) |
| College | 133 (13%) |
| University | 406 (41%) |
| Above graduate school | 96 (10%) |
| Residency | |
| Dormitory residence | 9 (<1%) |
| Number of household members sharing main residence | |
| 0 | 1 (<1%) |
| 1 | 53 (5%) |
| 2 | 96 (10%) |
| 3-4 | 693 (70%) |
| 5-6 | 129 (13%) |
| >6 | 15 (2%) |
| Number of children <10 years sharing main residence | |
| 0 | 728 (74%) |
| 1 | 146 (15%) |
| 2 | 106 (11%) |
| 3-4 | 7 (<1%) |
| Employment status | |
| Employed/self-employed | 634 (64%) |
| Unemployed | 117 (12%) |
| In school/university | 236 (24%) |
| Medical status | |
| Concomitant medication | 45 (5%) |
| Current controlled non-serious chronic conditions | 56 (6%) |
| Hypertension | 8 (1%) |
| Hyperlipidaemia | 6 (1%) |
| Dyslipidaemia | 4 (<1%) |
| Hypothyroidism | 4 (<1%) |
| Osteoporosis | 4 (<1%) |
| Previous diagnoseda meningococcal disease | 13 (1%) |
aNot confirmed from records/laboratory test.