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Table 2 Univariate analysis for three- year LFFS, DMFS, and OS

From: Lymph node ratio as a prognostic factor in head and neck cancer patients

Parameter

LFFS (%)

DMFS (%)

OS (%)

Age

   

51

61.3

76.1

58.4

  > 51

79.9

88.0

63.4

 

p = 0.02

p = 0.13

p = 0.76

Tumor site

   

 Oral cavity

64.8

81.7

56.4

 others

88.0

82.9

70.4

 

p = 0.06

p = 0.46

p = 0.28

Stage

   

 I + II

80.2

100

71.5

 III + IV

68.3

76.6

57.4

 

p = 0.23

p = 0.04

p = 0.13

Margin

   

 Positive

64.6

89.5

41.0

 Negative

73.3

79.2

67.6

 

p = 0.85

p = 0.14

p = 0.05

Extracapsular extension

   

 Positive

68.7

77.0

64.0

 Negative

70.8

83.4

58.6

 

p = 0.76

p = 0.93

p = 0.11

LNR for all patients

   

  < 0.1

76.1

87.2

67.0

0.1

54.9

66.4

41.0

 

p = 0.015

p = 0.06

p = 0.004

LNR for lymph node-positive patients

   

  < 0.06

75.6

94.1

77.8

 0.06–0.17

74.8

71.1

59.7

  > 0.17

24.2

57.3

23.5

 

p = 0.011

p = 0.18

p = 0.003

Absolute number of lymph node metastasis

   

 1

60.0

75.8

48.5

  > 1

66.4

76.6

58.0

 

p = 0.46

p = 0.96

p = 0.28

  1. OS overall survival, LFFS local failure-free survival, DMFS distant metastasis-free survival, LNR lymph node ratio