Figure 4From: Epidemiology of anti-tuberculosis drug resistance in a chinese population: current situation and challenges ahead Percentage of MDR-TB by age group. A. Percentage of MDR-TB by age group among all cases. B. Percentage of MDR-TB by age group among new cases. C. Percentage of MDR-TB by age group among previously treated cases. MDR: resistant to at least isoniazid and rifampicin. P values were estimated based on the Chi-square test.Back to article page