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Table 1 Clinicopathological characteristics of the patients

From: Concordance between PIK3CA mutations in endoscopic biopsy and surgically resected specimens of esophageal squamous cell carcinoma

Characteristics

Number

Percent

Age (mean ± SD)

62.7 ± 7.0

 

Gender

 Male

150

82.9

 Female

31

17.1

Smoking habit

 Non-smoker

33

18.2

 Smoker

148

81.8

Alcohol consumption

 Non-drinker

33

18.2

 Drinker

148

81.8

Location

 Upper

26

14.4

 Middle

83

45.9

 Lower

72

39.8

T factor

 1b

51

28.2

 2

22

12.2

 3

104

57.5

 4

4

2.2

N factor

 0

57

31.5

 1

60

33.1

 2

48

26.5

 3

16

8.8

M factor

 0

170

93.9

 1

11

6.1

TNM stage

 I

30

16.6

 II

51

28.2

 III

89

49.2

 IV

11

6.1

Histological grade

 W/D

38

21.0

 M/D

120

66.3

 P/D

23

12.7

Lymphatic invasion

 Absent

89

49.2

 Present

92

50.8

Venous invasion

 Absent

36

19.9

 Present

145

80.1

  1. Abbreviations: W/D well differentiated, M/D moderately differentiated, P/D poorly differentiated, SD standard deviation