See Bland and Altman. Agreement between methods of measurement with multiple observations per individual Journal of Biopharmaceutical Statistics (2007) vol. 17
*
pp. 571-582.
(Accuracy Root Mean Square) values measured using the Radius PPG sensors under no motion,
rms
90–100%
80–90%
70–80%
70–100%
SpO
Upper and Lower Limits of Agreement (LoA)*
2
Upper 95% LoA
Lower 95% LoA
(SpO
-SaO
) vs. (SpO
+SaO
)/2 Bland Altman fit and upper 95% and lower 95% limits of agreement.