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Table 5 A comparison of patients enrolled in the first 15 years and the last 5 years of the study period

From: Outcomes of colorectal cancer surgery in the nonagenarians: 20-year result from a tertiary center

  First 15 years Last 5 years p value
Complications 38.3% 40% 0.271
30-day mortality 8.5% 10% 0.339
180-day mortality 34% 20% 0.386
1-year survival 59.6% 70% 0.224
2-year survival 40.4% 60% 0.023