Table 2.

Correlation between MR relaxation rates and total cellular iron content in P19 cells.

Transverse relaxation rates	aWhole data set (n = 36)	No hepcidin treatment (n = 25)			Hepcidin treatment (n = 11)			Difference between slopes
	br	r	bβ	r2	r	β	r2
R2*	0.607 p < 0.001	0.629 p < 0.001	10.09	0.396	0.851 p < 0.001	35.36	0.724	p < 0.05
R2	0.468 p < 0.01	0.473 p < 0.01	5.25	0.224	0.866 p < 0.001	27.77	0.750	p < 0.01
$R_2^{\text{prime}}$	0.679 p < 0.001	0.719 p < 0.001	4.84	0.517	0.532 p < 0.05	cn.s.	n.s.	cn/a

^aStatistical analysis of the whole data set combines samples treated with (n = 11) and without (n = 25) hepcidin. n, sample size.

^br, Pearson correlation coefficient; p, level of significance; β, linear regression slope.

^cn.s., not significant; n/a, not applicable.