Fig. 3From: Effect of perioperative use of parecoxib on chronic post-surgical pain in elderly patients after hepatectomy: a prospective randomized controlled studyVAS within postoperative 72 h. A VAS at rest; B VAS with coughing, Spot or square for the mean of the index. Length of bars for standard deviation. P-values of inter-group comparisons at each time point indicated as bars. P-values for the between-group difference were calculated with repeated measure ANOVABack to article page