Table 2.

Changes in postoperative facial oedema from baseline

Time interval	Intramasseteric injection	Pterygomandibular space injection	p-value	Statistical test
Baseline to day 2 (mm)	4 (1–8)	6 (4–12)	< 0.001	Wilcoxon signed-rank test
Baseline to day 7 (mm)	0.5 (0–1)	1 (0–3)	0.006	Wilcoxon signed-rank test
Within-site time effect	p < 0.001	p < 0.001	–	Friedman test

Values are medians (minimum–maximum). Oedema change is expressed in millimetres (mm) and represents the absolute change in the cumulative sum of five linear craniometric measurements. Confidence intervals for differences between site-specific medians were not calculated