Research Article
Infectivity of Mycobacterium tuberculosis Genotypes and Outcome of Contact Investigation in Classroom in Guangxi, China
Table 4
Ordered logistic regression for genotypes of index cases to the outcome of contact screening.
| | Variables | Contact screening results | Ordinal adjusted OR (95% CI) | P-value | | 0-5 mm | 6-9 mm | 10-14 mm | ≥ 15 mm (without TB) | ≥ 15 mm (with TB) |
| | Index case genotypes | | Non-Beijing | 407 (87) | 26 (5.6) | 18 (3.8) | 10 (2.1) | 7 (1.5) | 1 | | | Beijing | 298 (71.1) | 79 (18.9) | 26 (6.2) | 15 (3.6) | 1 (0.2) | 1.34 (0.93, 1.95) | 0.057 | | Unknown | 4623 (82.2) | 544 (9.7) | 238 (4.2) | 183 (3.3) | 37 (0.7) | 1.12 (0.85, 1.51) | 0.221 | | Sex of index case | | Male | 2575 (84.8) | 291 (9.6) | 82 (2.7) | 64 (2.1) | 26 (0.9) | | | | Female | 2753 (79.2) | 358 (10.3) | 200 (5.8) | 144 (4.1) | 19 (0.5) | 1.39 (1.21, 1.60) | <0.001 | | School type | | High school | 3453 (84.7) | 383 (9.4) | 121 (3) | 100 (2.5) | 21 (0.5) | 1 | | | Middle school | 1875 (77) | 266 (10.9) | 161 (6.6) | 108 (4.4) | 24 (1) | 1.65 (1.45, 1.88) | <0.001 | | Sex of contacts | | Male | 2671 (82) | 348 (10.7) | 140 (4.3) | 75 (2.3) | 22 (0.7) | 1 | | | Female | 2657 (81.6) | 301 (9.2) | 142 (4.4) | 133 (4.1) | 23 (0.7) | 1.10 (0.97, 1.25) | 0.07 | | Ethnicity of contacts | | Han | 2196 (86.8) | 128 (5.1) | 102 (4) | 69 (2.7) | 34 (1.3) | 1 | <0.001 | | Non-Han | 3132 (78.6) | 521 (13.1) | 180 (4.5) | 139 (3.5) | 11 (0.3) | 1.71 (1.48, 1.97) | | | BCG scar of contacts | | Present | 3810 (82.9) | 397 (8.6) | 211 (4.6) | 143 (3.1) | 35 (0.8) | 1 | | | Absent | 1518 (79.2) | 252 (13.2) | 71 (3.7) | 65 (3.4) | 10 (0.5) | 1.19 (1.04, 1.37) | <0.001 |
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