Table 1.

α^3.7 allele and genotype frequencies.

	Allelic frequencies			Genotypes
Subjects	Αα	-α3.7		αα/αα	-α3.7/αα	-α3.7/-α3.7
Euro-descendants	0.98	0.02		192 (95.5)*	9 (4.5)	0
African Brazilians	0.88	0.12		147 (77.0)	41 (21.5)	3 (1.6)
p	< 0.001	< 0.001			< 0.001
Patients with microcytic anemia	0.80	0.20		69 (68.3)	23 (22.8)	9 (8.9)
p§	< 0.001	< 0.001		< 0.001	< 0.001	0.027
p#	< 0.001	< 0.001		0.01		< 0.001

*Number of individuals and percentage (in parentheses). ^§,#compared with Euro-descendants and African Brazilians, respectively.