Volume 23, Number 3—March 2017
Research
Mycobacterium tuberculosis Transmission among Elderly Persons, Yamagata Prefecture, Japan, 2009–2015
Junji Seto
, Takayuki Wada, Yu Suzuki, Tatsuya Ikeda, Katsumi Mizuta, Taro Yamamoto, and Tadayuki Ahiko
, Takayuki Wada, Yu Suzuki, Tatsuya Ikeda, Katsumi Mizuta, Taro Yamamoto, and Tadayuki Ahiko
Table 4
Risk factors for nonlinked results of contact tracings among 128 TB cases clustered in Yamagata Prefecture, Japan, 2009–2015
| Characteristic | No. (%) cases with epidemiologic link |
Odds ratio (95% CI)* |
|||
|---|---|---|---|---|---|
| Linked or possibly linked | Not linked | Univariate | Multivariate† | ||
| Patient age group | |||||
| <59 | 37 (52.9) | 14 (24.1) | 1.0 | 1.0 | |
| >60 |
33 (47.1) |
44 (75.9) |
3.5 (1.6–7.6) |
2.9 (1.3–6.6) |
|
| Patient sex | |||||
| F | 39 (55.7) | 20 (34.5) | 1.0 | 1.0 | |
| M |
31 (44.3) |
38 (65.5) |
2.4 (1.2–4.9) |
2.2 (0.994–4.9) |
|
| Mycobacterium tuberculosis lineage | |||||
| Non-Beijing | 16 (22.9) | 22 (37.9) | 15.8 (3.3–76.9) | 12.5 (2.5–63.3) | |
| Ancient Beijing | 31 (44.3) | 34 (58.6) | 12.6 (2.7–57.9) | 10.1 (2.1–48.2) | |
| Modern Beijing | 23 (32.9) | 2 (3.4) | 1.0 | 1.0 | |
*CIs that do not overlap the null value of odds ratio = 1 are shown in bold.
†Adjusted for the other factors used in the multivariate model.
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