GSTM1 and G6PD deficiency: Using a cutoff value of 2.6 U/g Hb for the first screening, 1,653 newborns (1,243 males and 410 females) were considered to be at high-risk for G6PD deficiency, yielding screen positive rates of 1.66% (1,653/99,546), 2.30% (1,243/54,101), and 0.90% (410/45,445) for all, male, and female newborns, respectively.