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. 2019 Sep 11;276(12):3425–3434. doi: 10.1007/s00405-019-05597-0

Table 1.

Characteristics of SEER patients with lymph node (LN) positive salivary gland cancer

Categorical variables No. of patients (N = 1210) %
Race
 White 1042 86.1
 Black 71 5.9
 Other 97 8.0
Gender
 Male 843 69.7
 Female 367 30.3
Year of diagnosis
 1988–1994 103 8.5
 1995–2001 290 24.0
 2002–2008 817 67.5
Primary site
 Parotid 968 80.0
 Submandibular 201 16.6
 Sublingual 9 0.7
 Others 32 2.6
Histologic subtype
 Squamous cell carcinoma 289 19.8
 Adenocarcinoma 187 14.6
 Adenoid cystic carcinoma 92 7.6
 Mucoepidermoid carcinoma 234 19.3
 Other 408 38.6
Grade
 I 35 2.9
 II 185 15.3
 III 499 41.2
 IV 237 19.6
 Unknown 254 21.0
Surgery and radiation
 Both 930 76.9
 No 280 23.1
T staging
 T1 + T2 355 29.3
 T3 + T4 744 61.5
 Tx 111 9.2
N staging
 N1 456 37.7
 N2 725 59.9
 N3 29 2.4
M staging
 M0 1124 92.9
 M1 48 4.0
 Mx 38 3.1
Continuos variables Median (range)
Age 65 years (6–100)
No. of LN examined 16 (1–90)
No. of positive LNs 2 (1–83)
Lymph node ratio 0.31 (0.01–1.00)