APOB and diabetes mellitus: Nevertheless, after adjusting for age, body mass index, systolic blood pressure, smoking, hs-CRP, Apo B/Apo A1 ratio, and diabetes, the authors found an inverse association again for MI in the highest quartile of iron (OR = 0.62; 95% CI: 0.39–0.97) and TS (OR = 0.56; 95% CI: 0.34–0.89), compared with the lowest quartile of iron.