xRead Articles - November 2022

Xiao et al

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Table 3. (continued)

N 1 , %

Histology

P

Occult Nodes, %

P

T3 T4

2.4

0

29.4

22.2

.008 a

.925 a,b

Low grade High grade

5

6

17.9

6.7

Total T1

\ .001

9.8

5.8

.014

T2 T3 T4

21.3

11.3 12.5 21.6

35

47.6

\ .001

\ .001

Low grade High grade

9.3

5

50.9

25

a More than 20% of cells in this table have expected cell counts \ 5. Chi-square results may be invalid. b The minimum expected cell count in this table is \ 1. Chi-square results may be invalid.

Table 4. Overall Survival by Nodal Status and Grade.

N0, % N 1 , %

Histology: Overall Survival

P log-rank

Low Grade, % High Grade, %

P log-rank

Mucoepidermoid carcinoma 2 y

\ .001

\ .001

91 82

66 43

96 88

67 47

5 y

Acinar cell carcinoma 2 y

\ .001

\ .001

97 90

78 54

98 91

70 40

5 y

Adenocarcinoma not otherwise specified 2 y

\ .001

\ .001

83 65

57 29

87 71

63 38

5 y

Adenoid cystic carcinoma 2 y

\ .001

\ .001

91 79

76 53

93 84

71 47

5 y

Carcinoma ex-pleomorphic adenoma 2 y

\ .001

\ .001

91 78

61 38

92 80

73 53

5 y

Salivary ductal carcinoma 2 y

\ .001

\ .001

88 73

69 35

89 74

71 42

5 y

Epithelial-myoepithelial carcinoma 2 y

93 80

81 56

.005

93 77

81 56

.07

5 y

Basal cell adenocarcinoma 2 y

94 79

95 82

.686

94 88

100

.377

5 y

69

All histologies 2 y

\ .001

\ .001

91 79

64 40

94 85

66 44

5 y

contrast, high T stage (T4) was most predictive for adenoid cystic carcinoma (OR, 3.102; 95% CI, 1.342-7.169)], and sali vary ductal carcinoma (OR, 9.857; 95% CI, 3.109-31.246).

Multivariate analysis could not be adequately performed for epithelial-myoepithelial carcinoma and basal cell adenocarci noma with limited sample sizes.