How are personality traits and physical activity involved in colorectal carcinogenesis? A cross-sectional study on patients undergoing colonoscopy

Introduction
Inflammatory state of the large bowel is a key factor for the development of colorectal cancer (CRC). It has multifactorial aetiology, including psychological determinants. Physical activity may have a protective function against CRC via anti-inflammatory properties; on the contrary, personality traits correlate with an unhealthy and dangerous lifestyle.

Objective
To measure the association between personality traits, lifestyle and colonoscopy outcome.

Methods
Cross sectional study. Patients undergoing colonoscopy aged 40 or more, with a negative history for cancer or inflammatory bowel disease, were enrolled. Data collected: colonoscopy outcome, smoke, alcohol, physical activity, presence/absence of Metabolic Syndrome, personality traits assessed by the Temperament & Character Inventory (TCI).

Results
In a sample of 53 subjects (females = 24, 45.3%), the mean age was 60.66 ± 9.08. At least one adenoma was found to 23 patients (43.3%). Twenty patients were smokers (37.74%), 36 (67.92%) drank alcohol at least weekly; approximately 60% reported regular physical activity. At the multivariate regression, the outcome was associated to: TCI Self Transcendence domain (ST) (OR = 1.36, P = 0.04) and physical activity (OR = 0.14, P = 0.03).

Conclusion
People with ST's characteristic personality traits and sedentary life style are more likely to have precancerous colorectal lesions. This confirms the protective role of physical activity, and suggests to further explore the role of personality in cancerogenesis.