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Table 1: Characteristics of 43 participants with NPC and 41 participants with benign hyperplasia in the nasopharynx
Clinical Characteristics Patients with NPC (n = 43) Patients with Benign Hyperplasia (n = 41)
Age (yr) 
 Median 53 (33–83)^{^a} 54 (41–66)^{^a}
 Mean ± SD 54.5 ± 10.5 53.6 ± 6.9
Sex 
 Men 31 41
 Women 12 0
Primary tumor invasion 
 Deep invasion absent (stage T1) 14 NA
 Deep invasion present (stages T2–4) 29 NA
Note:—NA indicates not applicable.
↵a Data in parentheses indicate the range.

Clinical Characteristics	Patients with NPC (n = 43)	Patients with Benign Hyperplasia (n = 41)
Age (yr)
Median	53 (33–83)^{^a}	54 (41–66)^{^a}
Mean ± SD	54.5 ± 10.5	53.6 ± 6.9
Sex
Men	31	41
Women	12	0
Primary tumor invasion
Deep invasion absent (stage T1)	14	NA
Deep invasion present (stages T2–4)	29	NA