Summary of curve metrics, mean (95% CI).

Data are presented as mean (95% confidence interval, lower bound; upper bound). CNSLBP: chronic non-specific low-back pain, HC: healthy control, m: slope, p: p-value for statistical testing (independent T-test, 2-tailed), PSE: point of subjective equality, XY0.25: interpolated log scaling factor at a response frequency of 0.25, Y0.75: interpolated log scaling factor at a response frequency of 0.75. *in contrast to HC, the confidence interval of the PSE for subjects with CNSLBP does not include 0. Summary of curve metrics, mean (95% CI).