Comparison of P-values in testing gene-gene interaction between hemoglobin (Hb) gene and α+-thalassemia gene.

afrequencies were shown as No. of case/No. of control.bP-values reported by Williams et al.cthe lowest P-value among logistic regression models by assuming additive × additive, dominant × dominant and recessive × recessive interaction models, respectively.dobtained by logistic regression model by coding genotypes as factors.