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Table 4 Characteristics of the 257 colorectal cancer patients with unresectable metastasis who had normal LDH levels

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) ≤60 141 103 38 0.500
>60 116 89 27
Sex Men 180 134 46 0.882
Women 77 58 19
Location Right 98 75 23 0.799
Left 80 60 20
Rectal 79 57 22
First-line chemotherapy Oxaliplatin-based 228 171 57 0.763
Irinotecan-based 29 21 8
Metastasis organs 1 201 152 49 0.733
2 51 36 15
≥3 5 4 1
CEA (ng/mL) ≤5 62 45 17 0.658
>5 195 147 48
ALP (U/L) ≤110 223 166 57 0.800
>110 34 26 8
  1. All values are presented as number of patients
  2. PPTR palliative primary tumor resection, CEA carcinoembryonic antigen, ALP alkaline phosphatase, LDH lactate dehydrogenase