Development of a risk scoring system for predicting advanced colorectal neoplasia within subcentimetric polyps: A population-based study

Abstract

Objective: To determine a risk scoring system for predicting advanced colorectal neoplasia (ACN) within subcentimetric polyps in a large Asian population.

Methods: A retrospective study was conducted in Hong Kong SAR, China involving participants who underwent colonoscopy between 2008 and 2015. A random sample of 20 072 subjects were included as the derivation cohort to assess ACN-associated independent factors using logistic regression modeling. Another 8603 subjects formed a validation cohort. A risk scoring system was developed and its performance was assessed using the area under the receiver operating characteristic curve (AUROC).

Results: The risk scores were assigned based on the following criteria: (a) patients who were admitted from inpatient colonoscopy (2.2) or not (1); (b) with three or more chronic diseases (hypertension, diabetes mellitus, hyperlipidemia, heart disease, or cancer) (1.7) or not (1); (c) anemia (1.3) or without anemia (1); (d) receiving aspirin (0.5) or not (1); (e) receiving other nonsteroidal anti-inflammatory drugs (0.3) or not (1); (f) male (1.2) or female gender (1); (g) age <55 (1), 55–64 (1.4), 65–69 (2), 70 years or above (2.2). ACN was more common in those with scores of 2.192 or higher, and they were classified as high risk (HR). The prevalence of ACN in the validation cohort was 13.28% and 3.56% in the HR and low-risk groups, respectively. In both the derivation and validation cohorts, AUROC of the risk-scoring model was 0.7138.

Conclusion: Physicians are recommended to utilize this validated score for risk-stratification of patients having subcentimetric polyps.

Keywords

advanced colorectal neoplasia / polypectomy / screening

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2024 The Author(s). Journal of Digestive Diseases published by Chinese Medical Association Shanghai Branch, Chinese Society of Gastroenterology, Renji Hospital Affiliated to Shanghai Jiaotong University School of Medicine and John Wiley & Sons Australia, Ltd.