Table 1.
Characteristics of the cross-sectional population by different age groups (N = 246)
| Patient characteristics | 18–44 y (n = 46) | 45–64 y (n = 48) | 65–74 y (n = 35) | 75–83 y (n = 60) | ≥ 84 y (n = 57) |
|---|---|---|---|---|---|
| Birth sex | |||||
| Male (%) | 28 (60.9) | 28 (58.3) | 29 (82.9) | 40 (66.7) | 34 (59.7) |
| Female (%) | 18 (39.1) | 20 (41.7) | 6 (17.1) | 20 (33.3) | 23 (40.4) |
| Country of birtha | |||||
| Japan (%) | 39 (84.8) | 48 (100) | 35 (100) | 58 (96.7) | 57 (100) |
| Outside Japan (%) | 7 (15.2) | 0 (0) | 0 (0) | 2 (3.3) | 0 (0) |
| Race/ethnicity | |||||
| Asian (%) | 46 (100) | 48 (100) | 35 (100) | 60 (100) | 57 (100) |
| Co-morbidities (TB risk factors) | |||||
| Diabetes mellitus (%) | 4 (8.7) | 8 (16.7) | 6 (17.1) | 9 (15.0) | 11 (19.3) |
| End-stage renal disease (%) | 0 (0) | 1 (2.1) | 0 (0) | 0 (0) | 1 (1.8) |
| HIV positive (%) | 1 (2.2) | 0 (0) | 0 (0) | 0 (0) | 0 (0) |
| Immunosuppression (non-HIV related) (%) | 0 (0) | 2 (4.2) | 0 (0) | 1 (1.7) | 1 (1.8) |
| Dementiaa,b,c | 0 (0) | 0 (0) | 1 (2.9) | 4 (6.7) | 11 (19.3) |
| Contact with infectious TB patient | 3 (6.5) | 5 (10.4) | 1 (2.9) | 1 (1.7) | 0 (0) |
HIV human immunodeficiency virus, TB tuberculosis
ap-Value < 0.05 comparing those aged < 65 to those ≥ 65 years
bp-Value < 0.05 comparing those aged < 75 to those ≥ 75 years
cp-Value < 0.05 comparing those aged < 84 to those ≥ 84 years