Logistic regression was used to determine the propensity score (probability of MDC) for each patient, and MDC and non-MDC patients then were matched 1:1 on the basis of their score.

• 使用逻辑回归方法确定每例患者的趋势积分（多学科治疗的概率），然后将MDC和非MDC患者按照其积分以1:1的比例进行配对。