Fig. 4
Comparison of the NFR thresholds for Group A patients with BPS scores of 3 compared to BPS scores of 4 and BPS scores ≥ 5. Statistically significant differences between NFR thresholds of BPS 3 and 4 (p-value = 0.005) were calculated using a Mann-Whitney rank-sum test. No statistically significant differences were found between NFR thresholds of BPS 3 and BPS 4 and BPS ≥ 5 (p = 0.178, p = 0.959). Number of patients (np) and measurements (nm) per group: BPS 3: np = 51, nm = 210, BPS 4: np = 28, nm =53, BPS ≥ 5: np = 8, nm = 15)