Forty-three percent of the sample had the “low-activity” genotype, and 57% had the “high-activity” genotype. There were no statistically significant differences in terms of genotype (classified by functional expression group) between maltreated children and control subjects (χ2 = .8, df = 1, ns) or between children of different ethnicities (χ2 = 1.6 df = 4; ns).
