Table 2.

The iron accumulation region test results between age and average image intensity.

A. Multivariate Regression Coefficients f(x) = a × x + b
		Estimate	Std. Err.	T	p-Value
Intercept b		−169.77	70.22	−2.42	0.02
Δb Controls		−22.02	70.22	−0.31	0.76
Δb Patients with AGU		+22.02	70.22	+0.31	0.76
Slope a		23.73	6.04	3.93	<0.01
Δa Controls		−29.46	6.04	−4.87	<0.01
Δa Patients with AGU		+29.46	6.04	+4.87	<0.01
B. Analysis of Covariance
	df	Sum. sq.	Mean sq.	F	p-Value
Group	1	3,771,650.55	3,771,650.55	277.69	<0.01
Age	1	349,463.43	349,463.43	25.73	<0.01
Group × Age	1	322,764.71	322,764.71	23.76	<0.01
Error	28	380,303.90	13,582.28