Head-and-neck squamous cell carcinoma risk in smokers: no association detected between phenotype and AHR, CYP1A1, CYP1A2, or CYP1B1 genotype

Table 8 Detailed studies of chromosomal frequencies of CYP1B1 haplotype ACTTGATC in haploblock 2

Ethnicity (self-identified)	ACTTGATC^*		Other haplotypes		Total chromosomes
	HS	HR	HS	HR
Caucasian-American (CAU)	3	0	199	190	392
African-American (AFR)	8	0	14	6	28
Latino-American	0	0	0	2	2
Total	11	0	213	198	422

^*Statistically significant (P < 0.0001) by Fisher’s exact test (two-tailed), comparing AFR with CAU (HS patients)

ISSN: 1479-7364