Table 2.
Univariate Analysis of the Characteristics Associated With Infection With a Beijing Strain, China, 2009–2010
| Characteristic | Beijing Genotype, No. (%) | Non-Beijing Genotype, No. (%) | Beijing vs Non-Beijing |
|
|---|---|---|---|---|
| OR (95% CI) | P Value | |||
| Regions | <.001 | |||
| Sichuan | 112 (51.9) | 104 (48.1) | 1.00 | |
| Guangxi | 109 (61.9) | 67 (38.1) | 1.51 (1.00–2.27) | .045 |
| Shanghai | 314 (79.3) | 82 (20.7) | 3.56 (2.44–5.18) | <.001 |
| Shandong | 160 (77.7) | 46 (22.3) | 3.23 (2.08–5.01) | <.001 |
| Henan | 177 (89.8) | 20 (10.2) | 8.22 (4.57–14.78) | <.001 |
| Heilongjiang | 159 (86.4) | 25 (13.6) | 5.91 (3.45–10.11) | <.001 |
| Sex | ||||
| Male | 731 (74.8) | 246 (25.2) | 1.00 | |
| Female | 300 (75.4) | 98 (24.6) | 0.97 (.74–1.27) | .829 |
| Age (y) | .02a | |||
| <25 | 210 (81.1) | 49 (18.9) | 1.00 | |
| 25–44 | 333 (75.7) | 107 (24.3) | 0.73 (.50–1.06) | .098 |
| 45–64 | 274 (71.4) | 110 (28.6) | 0.58 (.40–.85) | .005 |
| ≥65 | 204 (73.6) | 73 (26.4) | 0.65 (.43–.98) | .040 |
| Unknown | 10 (66.7) | 5 (33.3) | 0.47 (.15–1.43) | .173 |
| Treatment history | ||||
| No prior treatment | 819 (74.1) | 286 (25.9) | 1.00 | |
| Prior treatment | 121 (78.1) | 34 (21.9) | 1.24 (.83–1.86) | .291 |
| Unknown | 91 (79.1) | 24 (20.9) | 1.32 (.83–2.12) | .240 |
| Genotypic cluster | ||||
| No | 703 (70.9) | 288 (29.1) | 1.00 | |
| Yes | 328 (85.4) | 56 (14.6) | 2.40 (1.74–3.30) | <.001 |
| Drug resistance | ||||
| No | 862 (74.9) | 289 (25.1) | 1.00 | |
| Yes | 169 (75.4) | 55 (24.6) | 1.03 (.74–1.44) | .861 |
| INH | 149 (76.8) | 45 (23.2) | 1.11 (.77–1.63) | .568 |
| RIF | 90 (73.8) | 32 (26.2) | 0.94 (.61–1.49) | .786 |
| MDR | 70 (76.1) | 22 (23.9) | 1.07 (.64–1.84) | .799 |
Abbreviations: CI, confidence interval; INH, isoniazid resistant; MDR, multidrug resistant, resistant to at least isoniazid and rifampin; OR, odds ratio; RIF, rifampin resistant.
a P value of χ2 test for trend.