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Table 2 Characteristics of the 387 colorectal cancer patients with unresectable metastasis

From: Palliative primary tumor resection provides survival benefits for the patients with metastatic colorectal cancer and low circulating levels of dehydrogenase and carcinoembryonic antigen

Characteristic

Variable

Total

PPTR group

Non-PPTR group

P

Age (years)

≤60

210

135

75

0.543

>60

177

119

58

Sex

Men

259

169

90

0.822

Women

128

85

43

Location

Right

132

87

45

0.120

Left

124

89

35

Rectal

131

78

53

First-line chemotherapy

Oxaliplatin-based

335

221

114

0.723

Irinotecan-based

52

33

19

Metastasis organs

1

283

194

89

0.108

2

92

52

40

≥3

12

8

4

CEA (ng/mL)

≤5

81

52

29

0.760

>5

306

202

104

ALP (U/L)

≤110

315

207

108

0.944

>110

72

47

25

LDH (U/L)

≤245

257

192

65

<0.001

>245

130

62

68

  1. All values are presented as number of patients
  2. PPTR palliative primary tumor resection, CEA carcinoembryonic antigen, ALP alkaline phosphatase, LDH lactate dehydrogenase