In PubMed, Web of Science and Embase, we identified a total of ten articles (13 independent studies), among which eight (five cohort, three cross-section) were about the studies on PTH and hypertension [10, 16–22], and five (two cohort, three cross-section) on PTH and T2D [8, 16, 18, 22, 23]. Here, PTH is linked to type 2 diabetes mellitus.