Factors influencing Frey syndrome after parotidectomy with acellular dermal matrix

Table 1 Number and proportion of patients with different symptoms in the Frey symptoms group, n (%)

Symptoms	Number and proportion of cases, n = 82
Facial paresthesia after eating	43 (52.4)
Flushed cheeks after eating	29 (35.4)
Facial sweating after eating	13 (15.9)
Feeling that life is severely affected after surgery	4 (4.9)

Table 2 Baseline characteristics of patients after parotidectomy

Clinical features	Frey group (n = 46)	Non-Frey group (n = 36)	P value
Sex (male)	26 (56.52%)	20 (55.56%)	0.93
Age (yr)	48.09 ± 14.95	47.08 ± 16.31	0.97
Surgically removed sample size (maximum diameter, cm)	3.40 ± 0.97	2.878 ± 0.79	0.0291
Method of surgery
ADM implants
Partial removal of parotid gland	8	9	0.295
Complete removal of parotid gland	3	8
No-implant ADM
Partial removal of parotid gland	21	18	0.0061
Complete removal of parotid gland	14	1
Procedure time (min)	198.54 ± 43.87	185.97 ± 57.75	0.92
Implanted ADM
Yes	11	17	0.0271
No	35	19
Time of Frey sign occurrence (months)
Implant ADM	7.54 ± 3.2	0	0.0011
Non-implant ADM	3.43 ± 2.33	0

¹Comparison of the time when Frey signs occurred with and without acellular dermal matrix implantation.

ADM: Acellular dermal matrix.