Figure 3.
(A) Standardized differences of variables between the patients who underwent uniportal and three-port thoracoscopic segmentectomy. Black circles and grey circles indicated differences before and after matching, respectively. Propensity score matching effectively minimize the difference of baseline characteristics between the 2 groups. (B) Mirror histogram of propensity score for the patients who underwent uniportal (above the horizontal line at zero) and three-port thoracoscopic segmentectomy (below the horizontal line at zero). Similar score distribution was found in the 2 matched groups. FEV1%, predicted forced expiratory volume in 1 second; DLCO%, predicted carbon monoxide diffusing capacity.