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Fig. 3. (A) The visual analogue scale (VAS) of pain intensity during resting was evaluated at 1, 6, 24, and 48 hours after the operation. VAS during resting decreased in both groups as time passed and was higher in group C than group R at 1 hour postoperatively (P = 0.011). (B) VAS of pain intensity during coughing was assessed at 1, 6, 24, and 48 hours after the operation. VAS during resting decreased in both groups as time passed and was higher in group C than group R at 1 hour postoperatively (P = 0.004). Data were expressed as median ± interquartile range. Mann-Whitney U-test was used for a comparison of the two groups at each measuring point, and rank transform for parametric factorial analyses using ANOVA procedures were performed to analyze the interaction between time and group. Group C: retrolaminar injection with saline, Group R: retrolaminar block with local anesthetics. *P < 0.05 compared with group C.
Korean J Pain 2020;33:378~385 https://doi.org/10.3344/kjp.2020.33.4.378
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