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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