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Table 1: Clinical characteristics of CXPA
Total Invasive Noninvasive P Value
Age (mean) (yr) 64.7 (SD, 13.4) 65.7 (SD, 12.4) 62.7 (SD, 15.3) .30
Sex 
 Male 26 19 7 .44
 Female 11 6 5
Location 
 Parotid gland 25 16 9 .68
 Submandibular 7 6 1
 Minor salivary 5 3 2
Laterality 
 Left 17 9 8 .16
 Right 20 16 4
Swelling 
 Yes 32 20 12 .15
 No 5 5 0
Pain 
 Yes 13 10 3 .48
 No 24 15 9
Infection 
 Yes 2 2 0 1
 No 35 23 12
Immobility 
 Yes 12 10 2 .26
 No 25 15 10
Nerve palsy 
 Yes 6 6 0 .15
 No 31 19 12
Skin infiltration 
 Yes 1 1 0 1
 No 36 24 12

	Total	Invasive	Noninvasive	P Value
Age (mean) (yr)	64.7 (SD, 13.4)	65.7 (SD, 12.4)	62.7 (SD, 15.3)	.30
Sex
Male	26	19	7	.44
Female	11	6	5
Location
Parotid gland	25	16	9	.68
Submandibular	7	6	1	.68
Minor salivary	5	3	2
Laterality
Left	17	9	8	.16
Right	20	16	4
Swelling
Yes	32	20	12	.15
No	5	5	0
Pain
Yes	13	10	3	.48
No	24	15	9
Infection
Yes	2	2	0	1
No	35	23	12
Immobility
Yes	12	10	2	.26
No	25	15	10
Nerve palsy
Yes	6	6	0	.15
No	31	19	12
Skin infiltration
Yes	1	1	0	1
No	36	24	12