Table 6.

Comparison of K_i between the estimated IFs

Number of subjects		IDIF	sPBIFAUC				sPBIFiDV			sPBIFPLAS
			15–45 min	30–60 min	45–75 min	60–90 min	Shiozaki et al. [8]	Vriens et al. [10]	This study
n = 10a	R2	0.99	0.98	0.98	0.98	0.99	0.97	0.96	0.97	0.99
	Bias	− 9%	3%	− 1%	− 6%	− 14%	− 8%	12%	3%	2%
	SD	10%	8%	8%	8%	9%	9%	11%	9%	6%
n = 12	R2	0.99	0.99	0.99	0.99	0.99	0.98	0.97	0.97	0.99
	Bias	− 16%	4%	0%	− 6%	− 13%	− 9%	11%	2%	3%
	SD	20%	9%	9%	8%	9%	11%	13%	12%	6%

^aTwo scans with the lowest K_i values were removed