Table 3. Fixed effects of time and multiple clinical variables on the postoperative VAS scores in the linear mixed effect models.

Variable	β coefficient	Standard error	P value	Semi-partial R2 (95% CIs)
Time	−0.898	0.126	<0.001	0.106 (0.068–0.151)
Harvested flap weight*	0.157	0.057	0.008	0.083 (0.048–0.124)
Subcutaneous plane block use	0.540	0.332	0.110	0.030 (0.010–0.059)

*, values divided by 100 were used for this analysis. VAS, visual analogue scale; CI; confidence interval.