Table 1.

Comparison of mean ± SD typical error (raw and %), Pearson r, and mean bias between the predicted and recorded chronic HRV responses across the sRPE and HSD validation datasets.

Measure	sRPE dataset	HSD dataset	Effect size (90% CIs)	Inference
Typical error (ms)	0.03 ± 0.01	0.08 ± 0.15	0.50 (-0.39 to 1.39)	Unclear
Typical error (%)	0.60 ± 0.27	1.84 ± 3.56	0.50 (-0.38 to 1.37)	Unclear
Pearson r	0.45 ± 0.34	-0.13 ± 0.40	-1.63 (-2.56 to -0.69)	Most likely ↑
Mean bias (%)	0.09 ± 0.72	-1.22 ± 1.46	-1.14 (-2.13 to -0.15)	Likely ↓