Soft tissue swelling incidence using demineralized bone matrix in the outpatient setting

Table 3 Showing preoperative and postoperative prevertebral soft tissue swelling at C2 and C6 vertebrae

	C2 preop PVSTS (mm)	C2 postop PVSTS (mm)	C2 intragroup P value	C6 preop PVSTS (mm)	C6 postop PVSTS (mm)	C6 intragroup P value
Group 1	4.7 ± 0.2	5.5 ± 0.4	0.08	11.1 ± 0.5	14.9 ± 0.6	0.285
Group 2	4.5 ± 0.5	4.9 ± 0.3	0.107	12.8 ± 0.5	14.8 ± 0.5	0.873
Intergroup P value	0.172	0.212		0.127	0.946

PVSTS: Prevertebral soft tissue swelling.