Mohammad Reza Rezvanfar
Ramin Ghahramani
Mohammad Rafiee
Mohammad Rasool Mokhtari
Sanam Ghanbarpoor

OBJECTIVES: To investigate fasting glucose, glucose tolerance, insulin resistance and insulin–like growth factor ۱ in patients with or without colorectal polyps. MATERIALS AND METHODS: In this cross-sectional study, we evaluated fasting glucose, insulin, insulin–like growth factor ۱ (IGF-۱), lipid profile and glucose tolerance test in ۱۰۳ patients undergoing colonoscopy (۵۲ normal and ۵۳ with Adenomatous polyps). We also estimated homeostasis model assessment insulin resistance index (HOMA-IR) in two groups. Statistical analyses were performed using the Student T-test and Chi-square test. For all tests a P value ≤ ۰.۰۵ was considered to be statistically significant. RESULTS: The mean of waist circumference (P < ۰.۰۱), waist to hip ratio (P < ۰.۰۱), fasting serum glucose (P < ۰.۰۵), total cholesterol (P < ۰.۰۵), and LDL (P < ۰.۰۵) were significantly higher in patients with adenomatous polyps. The mean of HDL was significantly lower in patients with adenomatous polyps (P < ۰.۰۱). There was no relation between fasting serum insulin, IGF-۱ and glucose tolerance test with adenomatous polyps. Hence HOMA-IR was higher in patients with adenomatous polyps (۲.۹ ± ۲.۶ vs. ۲.۸۲ ± ۲.۱), this difference was not significant statistically. CONCLUSION: Fasting hyperglycemia could be a risk factor to adenomatous polyps’ development. Although this study did not show any relation between insulin resistance index and adenomatous polyps, further studies are needed for more evaluation.

Hyperglycemia, Insulin Resistance, Colorectal Polyps