Discussion
REGRESSION, SECONDARY
The present study found that OLV increased the discrepancy in left–right SctOAlthough there are data to support the poor correlation of bilateral SctOOne strength of our study is that we employed a linear regression model to adjust for confounders that might affect SctOBecause the correlation at a single time point could not reflect the trend of change, we provided three methods to illustrate the question. First, we used a linear mixed model to compare the trend of SctOAnother interesting finding was that the maximal difference between the left and right SctOThe discrepancy in the left–right SctOOur results show that bilateral SctOOne limitation of the present study is its secondary analysis design. However, all these data were prospectively collected in a previous study which ensured the quality of the data. Second, the sample size was limited to 124 patients. Based on the results, the sample size yielded a statistical power of 0.99. Third, as discussed above, SjvO