PTH and diabetes mellitus: When assessed jointly, compared to those with both non-deficient 25(OH)D (≥50 nmol/L) and normal PTH (≤6.89 pmol/L), having deficient 25(OH)D levels (<50 nmol/L) was associated with significantly higher risk for diabetes, regardless of whether they had excess PTH levels (HR = 1.92; 95% CI: 1.42–2.58) or normal PTH levels (HR = 1.32; 95% CI: 1.12–1.57).