In one study of 157 patients, for whom an absolute renal risk of dialysis or death was calculated using the number of risk factors present at diagnosis (which included hypertension), proteinuria higher than 1 g/day and kidney biopsy features, patients with a higher absolute renal risk of dialysis had both higher Gd-IgA1 levels and a higher prevalence of hypertension [32]. This evidence concerns the gene IGHA1 and Hypertension.