Changing patterns of colorectal cancer in China between 2000 and 2016 based on tertiary hospital data

Colorectal cancer ranks fourth globally in cancer-related deaths, causing about nine million annual fatalities. Developed countries show higher mortality rates due to factors like aging, diet, obesity, inactivity, and tobacco use. While colonoscopy initiatives reduce incidence, early-onset cases rise. China faces a significant colorectal cancer burden. This study examines post-2000 colorectal cancer trends in Chinese tertiary hospitals to guide future priorities.

This study, spanning 2000-2016, gathered colorectal cancer data from five Chinese tertiary hospitals. Patient details, including age, gender, colonoscopy findings, and pathology reports, were anonymized with unique serial numbers to protect privacy.

The overall incidence rate in females is approximately 2.9%, which is lower than the 3.2% in males (p < 0.05). Female patients have a lower average age compared to males (59.7 vs. 61.5, p < 0.01). Additionally, after 2008, there is a significant increase in the average age of patients compared to before 2008 (p < 0.001), and the proportion of female patients has significantly risen (p < 0.05). The preferred location for colon cancer has shifted from the distal end to the proximal end, and there is also an increase in the malignancy level.

From the perspective of tertiary hospitals, the pattern of colorectal cancer in China has undergone significant changes. The focus of diagnosis and treatment in tertiary hospitals in China should gradually shift toward the elderly patients, which helps address healthcare needs and is of significant importance for resource allocation.