Table 1 Description of the study population and QFT-Plus results by putative risk factors
Variable | N (Col-%) | QFT-Plus positive | QFT-Plus negative | P-Value |
|---|---|---|---|---|
N (Row-%) | N (Row-%) | |||
Gender | 0.345 | |||
Female | 72 (53.7) | 4 (5.6) | 68 (94.4) | |
Male | 62 (46.3) | 7 (11.3) | 55 (88.7) | |
Age | 0.050 | |||
19–25 years | 87 (64.9) | 4 (4.6) | 83 (95.4) | |
26–39 years | 47 (35.1) | 7 (14.9) | 40 (85.1) | |
Country of birth classified by TB-Incidence | 0.002 | |||
< 125:100,000 | 86 (64.2) | 2 (2.3) | 84 (97.7) | |
≥ 125:100,000 | 48 (35.8) | 9 (18.8) | 39 (81.3) | |
Nationality classified by WHO regions | <0.001 | |||
Africa | 15 (11.2) | 4 (26.7) | 11 (73.3) | |
The Americas | 16 (11.9) | 0 (0) | 16 (100) | |
South-East Asia | 20 (14.9) | 3 (15.0) | 17 (85.0) | |
Europe | 49 (36.6) | 0 (0) | 49 (100) | |
Eastern Mediterranean | 20 (14.9) | 0 (0) | 20 (100) | |
Western Pacific | 14 (10.4) | 4 (28.6) | 10 (71.4) | |
Time living in Germany | 0.808 | |||
< 2 years | 53 (39.6) | 4 (7.5) | 49 (92.5) | |
2–10 years | 71 (53.0) | 7 (9.9) | 64 (90.1) | |
> 10 years | 10 (7.5) | 0 (0) | 10 (100) | |
Previous TB contact | 0.007 | |||
Yes | 35 (26.1) | 7 (20.0) | 28 (80.0) | |
No | 99 (73.9) | 4 (4.0) | 95 (96.0) | |
Type of TB contact | 0.009 | |||
Relatives | 9 (25.7) | 5 (55.6) | 4 (44.4) | |
Friends/acquaintances | 7 (20.0) | 1 (14.3) | 6 (85.7) | |
Professional | 14 (40.0) | 0 (0) | 14 (100) | |
Other type | 5 (14.3) | 1 (20.0) | 4 (80.0) | |
TB in own history | 0.082 | |||
Yes | 1 (0.7) | 1 (100) | 0 (0) | |
No | 133 (99.3) | 10 (7.5) | 123 (92.5) | |
BCG vaccination | 0.064* | |||
Yes | 66 (49.3) | 2 (3.0) | 64 (97.0) | |
No | 18 (13.4) | 3 (16.7) | 15 (83.3) | |
Unknown | 50 (37.3) | 6 (12.0) | 44 (88.0) | |
Previous TST | 0.306 | |||
Positive | 11 (8.2) | 2 (18.2) | 9 (81.8) | |
Negative | 18 (13.4) | 0 (0) | 18 (100) | |
Unknown | 6 (4.5) | 0 (0) | 6 (100) | |
No TST | 99 (73.9) | 9 (9.1) | 90 (90.9) | |
Study subject | 0.350 | |||
Medicine | 47 (35.1) | 5 (10.6) | 42 (89.4) | |
Engineering | 49 (36.6) | 3 (6.1) | 46 (93.9) | |
Natural sciences | 21 (15.7) | 3 (14.3) | 18 (85.7) | |
Other subject | 17 (12.7) | 0 (0) | 17 (100) |