Study finds, Correlations between patient characteristics an
The purpose of this study was to clarify the effects of preoperative characteristics and intraoperative factors on the time required to accomplish active straight-leg-raising, standing up, and walking as the objective performances for the initiation of early postoperative rehabilitation.

This cross-sectional retrospective study included 307 patients (384 primary total knee arthroplasties). Postoperative times required until each activity was accomplished were measured. Various preoperative characteristics and intraoperative factors that might affect three objective performances were evaluated.

--The postoperative times required before each activity was accomplished were 1.5 ± 0.5 days for active straight-leg-raising, 1.2 ± 0.5 days for standing up, and 1.4 ± 0.7 days for walking.

--There were no significant correlations between any factor and the three objective performances using Spearman’s correlation coefficient.

There were no differences in sex or American Society of Anesthesiologists grade for three objective functional assessments by Wilcoxon rank sum test.

Three objective functional performances in the early postoperative period are unlikely to be affected by differences in patient preoperative features and intraoperative circumstances. As a result, while starting early postoperative rehabilitation, there is no need to consider patient differences.