Patient and demographic characteristics according to treatment groups.

Abbreviation: RT, radiotherapy; CAD, coronary artery disease.Note 1: All above factors were used for propensity-score match to balance study groups.Note 2: All P values were calculated by using chi-square test.缩写说明：RT为放射治疗（radiotherapy）的缩写，CAD为冠状动脉疾病（coronary artery disease）的缩写。 注释1：上述所有因素均用于倾向得分匹配（propensity-score match），以平衡各组研究队列。 注释2：所有P值均通过卡方检验（chi-square test）计算得出。