Table 1.
Sociodemographic and clinical characteristics of included TB cases and comparison between clustered and nonclustered (unique) TB cases, Switzerland, 2000 to 2008
| Characteristic | Value for: |
||
|---|---|---|---|
| All cases (n = 520) | Clustered cases (n = 90) | Unclustered cases (n = 430) | |
| Median age (yr) at TB diagnosis (IQR) | 36.5 (28–51) | 36 (27–45) | 37 (29–53) |
| No. (%) of males | 254 (48.9) | 47 (52.2) | 207 (48.1) |
| No. (%) born in: | |||
| Switzerland | 119 (22.9) | 23 (25.6) | 96 (22.3) |
| Other Europe | 106 (20.4) | 17 (18.9) | 89 (20.7) |
| Sub-Saharan Africa | 132 (25.4) | 33 (36.7) | 99 (23.0) |
| Asia | 120 (23.1) | 12 (13.3) | 108 (25.1) |
| Central/South America | 20 (3.8) | 3 (3.3) | 17 (4.0) |
| Other regions/unknown | 23 (4.4) | 2 (2.2) | 21 (4.9) |
| No. (%) of: | |||
| Swiss nationals | 130 (25.0) | 19 (21.1) | 111 (25.8) |
| Foreigners, residents | 140 (26.9) | 18 (20.0) | 122 (28.4) |
| Foreigners, othera | 59 (11.3) | 13 (14.4) | 46 (10.7) |
| Asylum seekers/refugees | 101 (19.4) | 21 (23.3) | 80 (18.6) |
| Unknown | 90 (17.3) | 19 (21.1) | 71 (16.5) |
| No. (%) | |||
| HIV infected | 113 (21.7) | 21 (23.3) | 92 (21.4) |
| HIV negative | 407 (78.3) | 69 (76.7) | 338 (78.6) |
| No. (%) with immunosuppression other than due to HIV infectionb | 32 (6.2) | 8 (8.9) | 24 (5.6) |
| No. (%) with: | |||
| Previous TB diagnosis | 50 (9.6) | 8 (8.9) | 42 (9.8) |
| No previous TB diagnosis | 300 (57.7) | 50 (55.6) | 250 (58.1) |
| Unknown | 170 (32.7) | 32 (35.6) | 138 (32.1) |
| No. (%) with positive smear result | 168 (32.3) | 38 (42.2) | 130 (30.2) |
| No. (%) with cavitary disease | 113 (21.7) | 27 (30.0) | 86 (20.0) |
| No. (%) with clinical manifestation | |||
| Pulmonary | 387 (74.4) | 72 (80.0) | 315 (73.3) |
| Extrapulmonary | 133 (25.6) | 18 (20.0) | 115 (26.7) |
| No. (%) with TB in family or social surroundings in last 2 yr | 38 (7.3) | 11 (12.2) | 27 (6.3) |
a
Visitors, students, etc.
b
Use of anti-tumor necrosis factor (anti-TNF) blockers, malignancy, organ transplantation, use of steroids or methotrexate.