GSTM1 and Hypertension: As shown in Figure 3, after multivariable adjustments, discrete associations between high ln(iFGF23) and low Hb levels were noted in women aged ≤65 years who had a history of hypertension, CVD, or ARB usage and whose serum Cr level was ≤9 mg/dL, sodium >135 mEq/L, potassium ≤4.5 mEq/L, phosphate ≤5 mEq/L, ferritin ≤400 ng/mL, or alk-P >70 U/L (all p-values <0.05).