Table. 3.
Table. 3.
Factors assoicated with a positive TST result and a positive IGRA result
| TST | IGRA | |||||||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Negative n=1,416 | Positive n=770 | Univariate | Multivariate | Negative n=1,549 | Positive n=637 | Univariate | Multivariate | |||||||||
| OR | 95%CI | OR | 95%CI | OR | 95%CI | OR | 95%CI | |||||||||
| Age (year), mean | 39.5 | 44.7 | 1.063 | 1.053 | 1.074 | 39.3 | 46.2 | 1.091 | 1.078 | 1.104 | ||||||
| 20-29 | 253 (11.6) | 26 (1.2) | 1 | 1 | 258 (16.7) | 21 (3.3) | 1 | 1 | ||||||||
| 30-39 | 455 (20.8) | 168 (7.7) | 3.593 | 2.312 | 5.583 | 3.585 | 1.600 | 8.030 | 527 (34.0) | 96 (15.1) | 2.238 | 1.364 | 3.672 | 2.185 | .930 | 5.134 |
| 40-49 | 493 (22.6) | 369 (16.9) | 7.283 | 4.759 | 11.147 | 5.619 | 2.486 | 12.703 | 555 (35.8) | 307 (48.2) | 6.796 | 4.264 | 10.831 | 4.272 | 1.819 | 10.028 |
| 50-59 | 186 (8.5) | 196 (9.0) | 10.254 | 6.533 | 16.094 | 6.631 | 2.802 | 15.694 | 189 (12.2) | 193 (30.3) | 12.546 | 7.702 | 20.436 | 6.391 | 2.611 | 15.644 |
| ≥61 | 29 (1.3) | 11 (0.5) | 3.691 | 1.654 | 8.238 | 2.439 | .759 | 7.839 | 20 (1.3) | 20 (3.1) | 12.286 | 5.729 | 26.346 | 7.597 | 2.433 | 23.725 |
| Gender, male | 404 (28.5) | 334 (43.4) | 1.919 | 1.597 | 2.305 | 2.331 | 1.599 | 3.398 | 457 (29.5) | 281 (44.1) | 1.886 | 1.559 | 2.282 | 1.334 | .904 | 1.969 |
| Body mass index (kg/m2) | ||||||||||||||||
| 18.5-24.9 | 963 (76.6) | 491 (68.5) | 1 | 1 | 1,034 (75.2) | 420 (70.1) | 1 | 1 | ||||||||
| >18.5 | 86 (6.8) | 29 (4.0) | 4.349 | 1.995 | 9.485 | .993 | .615 | 1.603 | 98 (7.1) | 17 (2.8) | .427 | .252 | .724 | .701 | .386 | 1.272 |
| 25-29.9 | 193 (15.4) | 175 (24.4) | 1.512 | .979 | 2.335 | 1.176 | .898 | 1.542 | 224 (16.3) | 144 (24.0) | 1.583 | 1.247 | 2.008 | 1.012 | .764 | 1.342 |
| >29.9 | 15 (1.2) | 22 (3.1) | 2.689 | 1.684 | 4.294 | 2.723 | 1.272 | 5.832 | 19 (1.4) | 18 (3.0) | 2.332 | 1.212 | 4.488 | 1.974 | .947 | 4.114 |
| Findings on chest X-ray | ||||||||||||||||
| No active lung lesion | 1,091 (99.3) | 666 (97.5) | 1 | 1 | 1,208 (99.5) | 549 (96.7) | 1 | 1 | ||||||||
| Previously healed TB | 8 (0.7) | 17 (2.5) | 3.481 | 1.494 | 8.111 | 2.703 | 1.122 | 6.510 | 6 (0.5) | 19 (3.3) | 6.968 | 2.767 | 17.543 | 5.166 | 1.953 | 13.667 |
| Smoking status | ||||||||||||||||
| Never smoker | 984 (85.2) | 503 (70.8) | 1 | 1 | 1,075 (84.4) | 412 (69.7) | 1 | 1 | ||||||||
| Ex-smoker (quit ≥1 year) | 102 (5.5) | 112 (15.8) | 2.148 | 1.609 | 2.868 | .967 | .643 | 1.452 | 116 (9.1) | 98 (16.6) | 2.204 | 1.646 | 2.952 | 1.100 | .722 | 1.677 |
| Current smoker | 69 (6.0) | 95 (13.4) | 2.693 | 1.940 | 3.739 | 1.417 | .907 | 2.215 | 83 (6.5) | 81 (13.7) | 2.546 | 1.837 | 3.530 | 1.495 | .950 | 2.354 |
| Smoking amount (pack-years), mean | 10.3 | 12.7 | 1.023 | 1.001 | 1.046 | 10.1 | 12.9 | 1.030 | 1.008 | 1.053 | ||||||
| <5 | 50 (29.2) | 47 (22.7) | 1 | 61 (30.7) | 36 (20.1) | 1 | ||||||||||
| 5-<10 | 53 (31.0) | 50 (24.2) | 1.004 | .576 | 1.748 | 56 (28.1) | 47 (26.3) | 1.422 | .808 | 2.504 | ||||||
| 10-<15 | 19 (11.1) | 39 (18.8) | 2.184 | 1.109 | 4.300 | 30 (15.1) | 28 (15.6) | 1.581 | .818 | 3.058 | ||||||
| >-15 | 49 (28.7) | 71 (34.3) | 1.541 | .899 | 2.644 | 52 (26.1) | 68 (38.0) | 2.216 | 1.281 | 3.832 | ||||||
| Health care professions | ||||||||||||||||
| Physicians | 142 (10.0) | 82 (10.6) | .851 | .679 | 1.067 | 1.004 | .645 | 1.564 | 162 (10.5) | 62 (9.7) | 1.336 | 1.040 | 1.716 | .561 | .355 | .885 |
| Nurses | 427 (30.2) | 211 (27.4) | 1.169 | .850 | 1.606 | 1.511 | 1.063 | 2.147 | 506 (32.7) | 132 (20.7) | 1.467 | 1.034 | 2.081 | .626 | .437 | .897 |
| Ancillary staff | 542 (38.3) | 228 (29.6) | 1.649 | 1.145 | 2.374 | 1.297 | .948 | 1.776 | 571 (36.9) | 199 (31.2) | 1.917 | 1.294 | 2.839 | .757 | .554 | 1.034 |
| Technician_Laboratory Rad | 81 (5.7) | 66 (8.6) | 1.653 | 1.280 | 2.135 | 1.248 | .827 | 1.885 | 98 (6.3) | 49 (7.7) | 3.526 | 2.684 | 4.633 | .656 | .431 | .999 |
| Administrative | 224 (15.8) | 183 (23.8) | 1 | 1 | 212 (13.7) | 195 (30.6) | 1 | 1 | ||||||||
| Working duration, months (mean) | 181 | 233.7 | 1.004 | 1.003 | 1.004 | 177.6 | 252.8 | 1.005 | 1.005 | 1.006 | ||||||
| <12 months | 153 (10.8) | 36 (4.7) | 1 | 1 | 163 (10.5) | 26 (4.1) | 1 | 1 | ||||||||
| 12-<60 months | 234 (16.5) | 43 (5.6) | .781 | .480 | 1.272 | .849 | .419 | 1.719 | 239 (15.4) | 38 (6.0) | .997 | .583 | 1.706 | .962 | .447 | 2.072 |
| 60- <120 months | 115 (8.1) | 36 (4.7) | 1.330 | .790 | 2.241 | .829 | .411 | 1.672 | 126 (8.1) | 25 (3.9) | 1.244 | .685 | 2.258 | 1.010 | .464 | 2.197 |
| 120-<240months | 329 (23.2) | 193 (25.1) | 2.493 | 1.664 | 3.735 | 1.285 | .712 | 2.317 | 412 (26.6) | 110 (17.3) | 1.674 | 1.052 | 2.663 | .976 | .511 | 1.864 |
| 240-<360 months | 466 (32.9) | 386 (50.2) | 3.520 | 2.390 | 5.186 | 1.451 | .799 | 2.636 | 506 (32.7) | 346 (54.3) | 4.287 | 2.772 | 6.629 | 1.506 | .795 | 2.851 |
| >-360 months | 119 (8.4) | 75 (9.8) | 2.679 | 1.684 | 4.260 | 1.217 | .605 | 2.448 | 102 (6.6) | 92 (14.4) | 5.655 | 3.427 | 9.330 | 1.662 | .802 | 3.444 |
| Comorbidities | ||||||||||||||||
| Hypertension | 92 (7.9) | 92 (13.0) | 1.728 | 1.273 | 2.346 | 98 (7.7) | 86 (14.5) | 2.046 | 1.504 | 2.784 | ||||||
| Diabetes mellitus | 31 (2.7) | 40 (5.6) | 2.174 | 1.347 | 3.509 | 42 (3.3) | 29 (4.9) | 1.516 | .935 | 2.459 | ||||||
Korean J healthc assoc Infect Control Prev 2020;25:46~53 https://doi.org/10.14192/kjicp.2020.25.1.46
© Korean J healthc assoc Infect Control Prev