Using the Sysmex XN‐3000 as the reference method and the WHO criteria9 for the Hb cut‐off values, the sensitivity and specificity of the Mission Ultra Hb meter in detecting anemia were 86.2% (95% CI: 79.7–91.2) and 98.6% (95% CI: 95.2–99.8), respectively. The gene discussed is GSTM1; the disease is anemia (phenotype).