Outcomes of colorectal cancer patients undergoing elective and emergency surgeries

Primary outcome(s): To compare the early postoperative morbidity following surgical treatment for CRC in emergency and elective groups.Timepoint: Complications developing within 30 days of surgery will be considered as early postoperative morbidity主要结局指标：比较急诊与择期手术治疗结直肠癌（Colorectal Cancer, CRC）患者的术后早期并发症发生率。时间节点：术后30天内出现的并发症均视作术后早期并发症。