Table 1.
Demographic and baseline characteristics of health care workers
| Characteristic | Mecca cohort (n = 92) | Al-Ahsa cohort (n = 119) | P value |
|---|---|---|---|
| Mean age, y (SD; age range) | 35.3 (8.1; 24-64) | 31.5 (7.3; 25-62) | .001† |
| Age groups, Number (%) | |||
| 20-40 years | 68 (84.0) | 96 (86.5) | |
| 41-60 years | 11 (13.6) | 14 (12.6) | |
| >60 years | 2 (2.5) | 1 (0.9) | |
| Sex, Number (%) | <10−3† | ||
| Male | 46 (50.0) | 10 (8.6) | |
| Female | 46 (50.0) | 106 (91.4) | |
| Nationality, Number (%) | <10−3† | ||
| Saudi | 51 (60.7) | 13 (11.1) | |
| Non-Saudi | 33 (39.3) | 104 (88.9) | |
| Occupation*, Number (%) | .001† | ||
| Medical doctor | 24 (27.3) | 10 (8.7) | |
| Nurse | 56 (63.6) | 102 (88.7) | |
| Other | 8 (9.1) | 3 (2.6) | |
| Vaccination status, Number (%) | |||
| Meningitis | 81 (88.0) | 47 (39.8) | <10−3† |
| Invasive pneumococcal disease | 8 (15.1) | 10 (9.8) | .11 |
| Influenza (2015) | 59 (75.6) | 20 (22.2) | <10−3† |
| Risk factors and chronic conditions, Number (%) | |||
| Smoking habit | 17 (18.5) | 2 (1.7) | <10−3† |
| Chronic respiratory disease | 3 (3.3) | 2 (1.7) | .59 |
| Chronic cardiac disease | 2 (2.2) | 0 | 2.64 |
| Hypertension | 4 (4.3) | 2 (1.7) | 1.34 |
| Chronic kidney disease | 1 (1.1) | 0 | 1.34 |
| Chronic gastrointestinal disease | 2 (2.2) | 0 | 2.64 |
| Diabetes mellitus | 3 (3.3) | 3 (2.5) | .11 |
| Cancer | 0 | 0 | - |
| Immune deficiency | 1 (1.1) | 0 | 1.33 |
⁎
Medical doctor versus other.
†
Statistically significant difference.