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

Table 1 Cohort demographics with chief complaint

Variable	ACDF + DBM outpatient	ACDF + DBM inpatient	P value
Sample size (n)	75	70
Age (yr)	53 ± 1.0	53.4 ± 1.6	0.591
BMI (kg/m2)	27.9 ± 0.8	25.4 ± 1.0	0.484
Male	33	34	0.631
Female	42	36
Diagnosis
Herniated disc	28	23
Degenerative disc disease	26	24
Spondylosis (chronic pain)	7	12
Myelopathy	3	4
Radiculopathy	11	7

ACDF: Anterior cervical discectomy and fusion; DBM: Demineralized bone matrix; BMI: Body mass index.

Table 2 Showing preoperative and postoperative visual analogue scales and neck disability index scores

	Preoperative VAS	Postoperative VAS	Intragroup P value	Preoperative NDI	Postoperative NDI	Intragroup P value
Group 1	7.4 ± 0.2	4.0 ± 0.2	0.001	46.9 ± 1.9	26.1 ± 1.2	0.001
Group 2	8.9 ± 1.5	5.3 ± 0.3	0.03	46.2 ± 2.6	33.4 ± 2.4	0.002
Intergroup P value	0.75	0.62		0.289	0.34

VAS: Visual analogue scales; NDI: Neck disability index.

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.

Table 4 Demonstrating complications after surgery in each group

Complication	Outpatient	Inpatient
Dysphagia	4	5
Visited ER (not admitted)	3	0
Pain not relieved by TTH medications	2	0
Dressing completely soaked	1	0
Intractable pain	0	1

TTH: To take home.