GSTM1 and anemia (phenotype): In unadjusted multiple linear models, Hb concentration was associated with systolic blood pressure (SBP) (β 1.20 (95% CI, 0.28, 2.33), p=0.013) and DBP (β 1.94 (95% CI, 1.08,2.80) p<0.001), and in unadjusted logistic regression models, women with anaemia had increased odds for hypertension (OR 1.18 (95% CI, 1.20, 2.80), p=0.006).