Table 2.

Analysed RR intervals by the BCG algorithm and correlation coefficient of the simultaneously recorded ECG filtered by QI and corresponding mean ECG, BCG cycle length and the absolute difference between ECG and BCG cycle length.

Quality Index [au]	n =	Percentage [%]	r s =	Mean ± SD ECG [ms]	Mean ± SD BCG [ms]	Mean ± SD (ECG – BCG) [ms]
≥0.1	362040	100	0.77	924 ± 220	908 ± 203	15 ± 162
≥0.15	361897	99.9	0.77	924 ± 220	908 ± 203	15 ± 162
≥0.2	358126	98.9	0.8	924 ± 220	908 ± 203	15 ± 161
≥0.25	338193	93.4	0.81	924 ± 217	909 ± 201	15 ± 151
≥0.3	302529	83.6	0.85	923 ± 210	911 ± 198	12 ± 129
≥0.35	266041	73.5	0.91	922 ± 202	913 ± 195	8 ± 101
≥0.4	235367	65	0.95	920 ± 196	916 ± 194	4 ± 72