监控周期 meaning in Chinese

monitoring period

Patients oer 70 years old were more likely than younger patients to hae a dose delay of at least a week at some point during the trial , the authors report , but there was no difference in the median number of cycles administered , dose reductions , or grade 3 - 4 toxicity
作者们报道，大于70岁的病人与较年轻的病人相比，在该试验的某一时间更可能出现至少一个星期以上的剂量延迟，而监控周期的中位数、剂量减少和3 - 4级毒性都没有出现差异。