Table 1 Basic clinical information for the four cohorts

Age

≦ 60

107

26.55

46

27.88

27

20.77

46

20.54

 > 60

296

73.45

119

72.12

103

79.23

178

79.46

Gender

 Male

298

73.95

135

81.82

99

76.15

163

72.77

 Female

105

26.05

30

18.18

31

23.85

61

27.23

T stage

 < T2

4

0.99

104

63.03

91

70

173

77.23

≧ T2

366

94.29

61

36.97

38

29.23

51

22.77

Grade (WHO2004)

 Low

20

4.96

105

63.64

–

–

–

–

 High

380

94.29

60

36.36

–

–

–

–

Grade (WHO1999)

 G1

–

–

–

–

15

11.54

45

20.09

 G2

–

–

–

–

40

30.77

84

37.50

 G3

–

–

–

–

75

57.69

93

41.52

Vital status

 Alive

248

61.54

96

58.18

105

80.77

199

88.84

 Dead

155

38.46

69

41.82

25

19.23

25

11.16

Follow-up (mean ± SD, year)

2.10 ± 2.23

3.98 ± 3.10

4.14 ± 2.38

3.28 ± 2.10