老师好！我的论文是评价食管癌手术入路（左开胸 vs 右开胸）哪种效果好。有位审稿人提到“Co-variant factors should have been selected more meticulously to determine whether or not surgical approach had really been an “independent” prognosticator. The multivariate estimations were not sufficiently adjusted at all.”请问老师：他认为我的多因素分析没有得到充分调整，是指我纳入Cox模型中的协变量太少了对吗？说实话，确实是因为其他变量例数缺失比较多，我才没纳入。。。但我又不想承认是因为这个原因😂我应该如何回答他才好呢？ps：老师元宵节快乐！