CYP27A1 and diabetic kidney disease: For CYP27A1 rs17470271, T/T genotype carriers had a statistically significant lower risk of DKD compared with A/A carriers under both the codominant (OR = 0.34, 95% CI: 0.12–0.99, p = 0.04) and recessive (OR = 0.30, 95% CI: 0.11–0.85, p = 0.024) models.