Heartbeat Cycle Length Detection by a Ballistocardiographic Sensor in Atrial Fibrillation and Sinus Rhythm

Table 2

Filtering of the measured BCG during AF and SR by the quality index with remaining analyzable episodes and corresponding correlation coefficient.

Quality index	Atrial fibrillation				Sinus rhythm
		%		95% CI		%		95%
>0.1	4317	100	0.70	0.68 to 0.71	2445	100	0.75	0.73 to 0.77
>0.15	4301	100	0.70	0.69 to 0.72	2440	100	0.76	0.74 to 0.78
>0.2	4071	94	0.72	0.71 to 0.74	2359	96	0.79	0.77 to 0.80
>0.25	3468	80	0.76	0.74 to 0.77	2176	89	0.85	0.83 to 0.86
>0.3	2711	63	0.83	0.82 to 0.84	1933	79	0.901	0.9 to 0.92
>0.35	2088	48	0.87	0.86 to 0.88	1670	68	0.94	0.93 to 0.94
>0.4	1606	37	0.89	0.88 to 0.90	1410	58	0.95	0.95 to 0.96