We thank Xue and colleagues for their comments regarding our study. They highlighted several potentially important factors on complications after TKA. As addressed in our manuscript, our study is a retrospective outcomes study. It is our best intention to study many interesting risk factors while maintaining our focus. Therefore, we limited the number of risk factors in our analysis to the most interesting ones to us and other physicians in general, as we believe they are the most-representative and thought-provoking risk factors to consider. Still, we conducted further analysis with additional variables, including anemia, duration of surgery, and type of anesthesia (Fig. 1). We hope this can provide a basis for future research.