Correlation of cumulative fasting blood glucose exposure with gastrointestinal cancers: A prospective cohort study

At present, there is a lack of research on the correlation between cumFPG and digestive malignancies, and previous cohort studies have not considered the competitive risk between death and digestive malignancies, which may overestimate the impact of related risk factors. To explore the correlation between cumFPG and malignant tumors of the digestive system. In this study, 53,747 participants who had undergone 3 consecutive physical examinations since 2006 were collected. Finally, a total of 53,747 participants were included in this study. According to the grouping method of previous studies, cumFPG was divided into 4 groups according to the quartile. Cox regression model and competitive risk model were used to assess the risk of new digestive system malignancy. In sensitivity analyses, participants with cancer within 5 years of follow-up were excluded to eliminate the possibility of reverse causation. Subjects taking hypoglycemic drugs were excluded to eliminate the effect of the drug on blood glucose. Restricted cubic splineregresion (RCS) was then used to calculate the relationship between cumFPG and GI cancers. The mean age of participants was 49.02 ± 11.78 years. During a mean follow-up of 10.58 years, 817 new Gastrointestinal cases were identified, and the Cox proportional hazards model suggested that the risk of incidence in the Q2 to Q4 group increased sequentially compared with the lowest Q1 group, even after excluding the diagnosis of digestive malignancy within 5 years, the participants taking hypoglycemic drugs, and the death competition risk model analysis. In site-specific analysis, we observed that this risk was more pronounced in colorectal cancer, liver cancer, and pancreatic cancer, while gastric cancer, small bowel cancer, and bile duct cancer all had a similar trend to the main model but were not statistically significant, while esophageal cancer was U-shaped but not statistically significant. RCS results showed that cumFPG was associated with a similar risk of digestive system tumors, showing an inverted "√" type relationship. High levels of cumFPG are an independent factor in malignancy of the digestive system. cumFPG can provide a new idea for the prevention of Gastrointestinal cancers.