Table 4.

Mean and standard deviation of the RRIs and of the IBIs directly computed after beat detection (ORIGINAL) or refined through REG, SPLINE, and PARABOLA approaches; 95% LOA computed between the RRIs and each series of IBIs. The best performances in terms of 95% LOA are highlighted (green) for each sampling rate and protocol phase. The REG method was not appliable at 8 Hz.

				IBI
			RRI	ORIGINAL	REG	SPLINE	PARABOLA
FS = 64 Hz	Sit	Mean ± SD (ms)	794.7 ± 90.8	794.8 ± 92.4	794.8 ± 92.3	794.8 ± 92.2	794.8 ± 92.2
		95% LOA (ms)	-	±15.8	±10.8	±10.2	±10.2
	Stand	Mean ± SD (ms)	681.3 ± 67.6	681.3 ± 69.3	681.3 ± 69.1	681.3 ± 68.9	681.3 ± 69.0
		95% LOA (ms)	-	±16.0	±11.1	±9.6	±9.6
	CR	Mean ± SD (ms)	797.2 ± 99.3	797.3 ± 100.7	797.3 ± 100.6	797.3 ± 100.5	797.3 ± 100.5
		95% LOA (ms)	-	±17.9	±13.3	±12.8	±12.8
FS = 32 Hz	Sit	Mean ± SD (ms)	794.9 ± 91.0	794.9 ± 93.3	795.0 ± 92.5	794.9 ± 92.5	794.9 ± 92.4
		95% LOA (ms)	-	±27.0	±11.3	±10.4	±10.5
	Stand	Mean ± SD (ms)	681.3 ± 67.6	681.3 ± 70.2	681.3 ± 69.1	681.3 ± 69.0	681.3 ± 69.0
		95% LOA (ms)	-	±26.9	±11.5	±9.8	±9.9
	CR	Mean ± SD (ms)	797.5 ± 99.7	797.5 ± 101.9	797.6 ± 101.1	797.6 ± 101.0	797.6 ± 101.0
		95% LOA (ms)	-	±28.0	±13.6	±12.8	±12.8
FS = 16 Hz	Sit	Mean ± SD (ms)	794.9 ± 91.0	794.9 ± 95.8	795.0 ± 96.5	794.9 ± 92.5	794.9 ± 92.5
		95% LOA (ms)	-	±50.9	±54.8	±14.6	±14.6
	Stand	Mean ± SD (ms)	681.5 ± 67.6	681.5 ± 73.3	681.5 ± 78.1	681.5 ± 69.1	681.5 ± 69.1
		95% LOA (ms)	-	±50.7	±71.7	±14.5	±15.4
	CR	Mean ± SD (ms)	797.9 ± 100.8	798.0 ± 105.1	798.0 ± 105.8	798.0 ± 102.1	798.0 ± 102.1
		95% LOA (ms)	-	±52.1	±54.1	±15.7	±15.7
FS = 8 Hz	Sit	Mean ± SD (ms)	796.7 ± 93.9	796.8 ± 107.6	-	796.8 ± 95.8	796.8 ± 95.6
		95% LOA (ms)	-	±101.1	-	±31.2	±30.8
	Stand	Mean ± SD (ms)	685.3 ± 65.8	685.6 ± 83.3	-	685.5 ± 68.4	685.5 ± 68.4
		95% LOA (ms)	-	±99.3	-	±31.4	±32.6
	CR	Mean ± SD (ms)	798.3 ± 100.7	798.3 ± 114.1	-	798.4 ± 102.5	798.4 ± 102.4
		95% LOA (ms)	-	±102.6	-	±30.6	±30.7