Study on treatment outcome and risk factors of multidrug-resistant pulmonary tuberculosis patients in Shanghai

Objective To describe the characteristics of treatment outcomes of multidrug-resistant tuberculosis （MDR-TB） patients enrolled in second-line treatment in Shanghai from 2017 to 2018， and to analyze the influencing factors of treatment outcomes.

Methods Totally 182 MDR-TB patients were analyzed by using data collected from the China tuberculosis management information system， the hospital's electronic medical record information system， whole genome sequencing results and a questionnaire survey， and logistic regression analysis was used to analyze the factors affecting the success of treatment.

Results In 182 MDR-TB patients， the success rate of treatment was 65.4%， the loss to follow-up rate was 8.2%， the mortality rate was 4.9%， the unassessable rate was 13.7%， and the drug withdrawal rate was 7.7%. The factors affecting the success of treatment in MDR-TB patients included age （35‒ years old， OR=5.28， 95%CI： 1.58‒17.59， P=0.007； 55‒ years old， OR=16.30， 95%CI： 4.36‒60.92， P<0.001） and compliance to medication （OR=0.55， 95%CI： 0.42‒0.72， P<0.001）.

Conclusion The treatment success rate of MDR-TB patients in Shanghai from 2017 to 2018 is significantly higher than the average level in China. Older patients and patients with less compliant are at higher risk of adverse treatment outcomes.