Risk stratification nomogram for diabetic foot ulcer recurrence after healing in type 2 diabetes

Figure 2 Kaplan-Meier curves showing recurrence-free survival stratified by risk group (low, intermediate, high). Patients with healed diabetic foot ulcers were stratified by total nomogram points into low-risk (0-100 points; n = 89), intermediate-risk (101-180 points; n = 135), and high-risk (> 180 points; n = 88) groups. Recurrence-free survival showed clear stepwise separation across risk categories, with progressively worse outcomes in higher-risk patients. The curves diverged within the first 6 months after wound healing and remained separated through follow-up. Differences among groups were significant by log-rank test (P < 0.001). Median recurrence-free survival was not reached in the low-risk group, compared with 18.5 months in the intermediate-risk group and 9.8 months in the high-risk group.