Table 4.
Associations Between Beijing Strains and Drug Resistance, Stratified by Treatment History (n = 1260), China, 2009–2010
| Drug Sensitivity and Anti-Tuberculosis Treatment History | Total Cases, No. | Beijing Genotype, No. (%) | OR (95% CI)a |
|---|---|---|---|
| New cases | |||
| Drug susceptible | 965 | 714 (74.0) | 1.00 |
| Drug resistant | 140 | 105 (75.0) | 1.03 (.67–1.59) |
| INH | 119 | 92 (77.3) | 1.13 (.70–1.83) |
| RIF | 65 | 46 (70.8) | 0.96 (.54–1.72) |
| MDR | 44 | 33 (75.0) | 1.15 (.55–2.39) |
| Retreated cases | |||
| Drug susceptible | 96 | 76 (79.2) | 1.00 |
| Drug resistant | 59 | 45 (76.3) | 1.28 (.52–3.17) |
| INH | 51 | 39 (76.5) | 1.16 (.47–2.91) |
| RIF | 48 | 37 (77.1) | 1.56 (.60–4.07) |
| MDR | 40 | 31 (77.5) | 1.44 (.53–3.96) |
Abbreviations: CI, confidence interval; INH, isoniazid resistant; MDR, multidrug resistant, resistant to at least isoniazid and rifampin; OR, odds ratio; RIF, rifampin resistant.
a Adjusted for age, sex, and study settings.