Risk prediction rule for advanced neoplasia on screening colonoscopy for average-risk individuals

Figure 1 Receiver operator curve (area under the curve = 0. 73).

Figure 2 Model calibration plot. Each data point represents the comparison of observed (y) to expected (x) rates of advanced neoplasia in ten decile size groups (n = 98 each). The dashed line represents the linear trend with the corresponding line equation. (linear trend of y = 0.9204x + 0.0041 ; R² = 0.8509). AN: Advanced neoplasia.

Figure 3 Nomograms showing the predictive model. These nomograms are a function of age and show the risk of advanced neoplasia for (BMI < 25), overweight (BMI 25-29.9) and obese (BMI > 30).