Fig. 1From: Effects of preoperative surgeon warm-up in video-assisted thoracoscopic surgery lobectomyPropensity score matching. The two groups were matched for age, diabetes mellitus, coronary heart disease, COPD, hypertension, sex, ASA score, BMI, ECOG score, number of lymph node dissections, ACCI, and surgical site by caliper values (caliper values in the − 0.25 to 0.25 interval were included as matching factors) (Fig. 1)Back to article page