Table 2 Comparison of patient characteristics versus preoperative red cell distribution width (RDW)

Age (years)

0.0032

  <  70 (n = 217)

58 (26.7%)

159 (73.3%)

  ≥ 70 (n = 228)

91 (39.9%)

137 (60.1%)

Gender

0.47

 Male (n = 328)

113 (34.5%)

215 (65.5%)

 Femal (n = 117)

36 (30.8%)

81 (69.2%)

Tumor size (cm)

0.0004

  <  4 (n = 281)

77 (27.4%)

204 (72.6%)

  ≥ 4 (n = 164)

72 (43.9%)

92 (56.1%)

Histology

0.39

 Differentiated (n = 244)

86 (35.2%)

158 (64.8%)

 Undifferentiated (n = 201)

63 (31.3%)

138 (68.7%)

Depth of invasion ^a

0.057

 T1 (n = 284)

86 (30.3%)

198 (69.7%)

 T2/3/4 (n = 161)

63 (39.1%)

98 (60.9%)

Lymph node metastasis

0.55

 Absent (n = 342)

112 (32.7%)

230 (67.3%)

 Present (n = 103)

37 (35.9%)

66 (64.1%)

Lymphatic invasion

0.059

 Absent (n = 186)

53 (28.5%)

133 (71.5%)

 Present (n = 259)

96 (37.1%)

163 (62.9%)

Vascular invasion

0.011

 Absent (n = 232)

65 (28.0%)

167 (72.0%)

 Present (n = 213)

84 (39.4%)

129 (60.6%)

Stage of disease

0.54

 I (n = 310)

101 (32.6%)

209 (67.4%)

 II / III (n = 135)

48 (35.6%)

87 (64.4%)

Approach

0.16

 Open (n = 257)

93 (36.2%)

164 (63.8%)

 Laparoscopy (n = 188)

56 (29.8%)

132 (70.2%)

Gatrectomy (total vs. distal and proximal partial)

0.13

 Total (n = 95)

38 (40.0%)

57 (60.0%)

 Distal or proximal (n = 350)

111 (31.7%)

239 (68.3%)

Lymph node dissection

0.92

 D0 / D1 (n = 312)

104 (33.3%)

208 (66.7%)

 D2 (n = 133)

45 (33.8%)

88 (66.2%)

Adjuvant chemotherpy

0.14

 Absent (n = 377)

121 (32.1%)

256 (67.9%)

 Present (n = 68)

28 (41.2%)

40 (58.8%)