Fig. 3
From: Novel nomogram and decision curve analysis for predicting head and neck skin cancer risk

Nomogram of the simplified model for predicting head and neck skin cancer risk. This simplified model was constructed after excluding reverse causality variables (“Correct understanding of skin lesion” and “The right treatment for skin lesion”), and includes 8 core risk factors: Cosmetics, High fat diet, Enough vegetable intake, Habit of wearing hat, Lip-biting habits, Scratching habits, Smoking, and Prolonged outdoor exposure. Model Usage Instructions: Sum the corresponding scores based on an individual’s variable status (“0” = absent, “1” = present). Mark the total score on the “Total Points” axis, then draw a vertical line downward; the intersection with the “Risk” axis is the predicted risk of head and neck skin cancer. Specific scores for each factor: Cosmetics (61), High fat diet (27), Enough vegetable intake (-32), Habit of wearing hat (-100), Lip-biting habits (15), Scratching habits (43), Smoking (46), Prolonged outdoor exposure (40).