Table 2

CROM*01.12 and CROM*01.-12 genotype and allele frequencies among Thai blood donors.

Allele	Allele frequencies	Genotype	Observed (%)	χ² (DF=1)	P
Central Thais (N=1,580)
CROM*01.12	3,135 (0.992)	CROM01.12/CROM01.12	1,555 (98.42)	NA	NA
CROM*01.-12	25 (0.008)	CROM01.12/CROM01.-12	25 (1.58)
CROM*01.-12	25 (0.008)	CROM01.-12/CROM01.-12	0 (0.00)
Northern Thais (N=300)
CROM*01.12	594 (0.990)	CROM01.12/CROM01.12	294 (98.00)	0.269	0.604
CROM*01.-12	6 (0.010)	CROM01.12/CROM01.-12	6 (2.00)
CROM*01.-12	6 (0.010)	CROM01.-12/CROM01.-12	0 (0.00)
Southern Thais (N=427)
CROM*01.12	848 (0.993)	CROM01.12/CROM01.12	421 (98.59)	0.069	0.793
CROM*01.-12	6 (0.007)	CROM01.12/CROM01.-12	6 (1.41)
CROM*01.-12	6 (0.007)	CROM01.-12/CROM01.-12	0 (0.00)

Abbreviations: DF, degree of freedom; NA, not applicable.