The prevalence of platelet activating factor acetylhydrolase single nucleotide polymorphisms in relationship to necrotizing enterocolitis in Northwest Louisiana infants

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Table 3 Study population cross classified by three variables (ethnicity, presence or absence of NEC and the study genotypes)

Ethnicity	NEC	Abnormal genotype	Normal genotype	Total
Caucasian	Yes	1	19	20
Caucasian	No	43	149	192
African-American	Yes	7	9	16
African-American	No	145	197	342
Total		196	374	570

In view of small numbers, the homozygous abnormal genotype (genotype 1 in Table 2) and heterozygous abnormal genotype (genotype 2 in Table 2) were combined into one category (abnormal genotype).