Table 1 Demographic and clinical characteristics of patients with P-MEC.

From: Machine learning-based survival prediction nomogram for postoperative parotid mucoepidermoid carcinoma

Characteristics

n (%)

Age

 Median (IQR)

52.00 [37.00, 66.00]

  < 40

254 (28.8)

 40–50

146 (16.6)

 50–60

173 (19.6)

 60–70

138 (15.6)

  ≥ 70

171 (19.4)

Gender

 Female

445 (50.5)

 Male

437 (49.5)

Race

 White

669 (74.9)

 Black

120 (13.6)

 Other

101 (11.5)

Grade

 I

234 (26.5)

 II

396 (44.9)

 III

120 (13.6)

 IV

132 (15)

Stage

 I

353 (40)

 II

202 (22.8)

 III

170 (18.9)

 IVA

161 (18.3)

Tumor (T) stage

 T1

381 (43.2)

 T2

257 (29.1)

 T3

145 (16.4)

 T4

99 (11.2)

Node (N) stage

 N0

685 (77.7)

 N1

110 (12.5)

 N2

87 (9.9)

Radiation

 No

450 (51)

 Yes

432 (49)

Chemotherapy

 No/unknown

831 (94.2)

 Yes

51 ( 5.8)

Laterality

 Left

413 (46.8)

 Right

469 (53.2)

Marriage

 No

390 (44.2)

 Yes

492 (55.8)

Lymph node ratio (%)

 Median (IQR)

0.00 [0.00, 0.00]

 LNR0

686 (77.8)

 LNR1

196 (22.2)

  1. Grade is codefined as follows: Grade I, well differentiated, Grade II, moderately differentiated; Grade III, poorly differentiated, Grade IV, undifferentiated; anaplastic.
  2. Lymph node ratio, the number of positive lymph nodes divided by the number of neck lym-ph nodes dissected. LNR0, LNR(%) < 1.15. LNR1, LNR(%) ≥ 1.15.
  3. IQR, inter quartile range.
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