Analysis of the influence of four factors (number of input aECG signals, average ratio between <i>mR</i> and <i>fR</i> oscillations, average value of <i>sSQI</i> and <i>kSQI</i>) on the resulting extraction quality.

The influence of each factor on the accuracy was evaluated using a correlation coefficient (the 95% confidence interval is reported in parenthesis).