Table 4.

The Correlation of contrast threshold with serum ferritin level, dose of chelation therapy and duration of blood transfusion.¹

			Serum ferritin level		Duration of blood transfusion		Chelator dose
			P	r	p	r	p	r
Contrast threshold	Desferal	1 cpd	0.98	.004	0.03	-0.39	0.47	0.136
		5 cpd	0.06	0.346	0.18	0.246	0.19	0.246
		15 cpd	0.22	0.230	0.90	0.023	0.42	0.150
	Osveral	1 cpd	0.54	0.115	0.35	0.174	0.24	0.219
		5 cpd	0.31	0.191	0.70	0.071	0.29	0.199
		15 cpd	0.17	0.257	0.27	0.204	0.17	0.254

¹Pearson Correlation.