SHBG and diabetes mellitus: The study defined criteria for low SHBG as levels< 12.3 nmol/L in men < 50 years and < 23.5 nmol/L in men ≥ 50 years.Risk factors for low SHBG included higher BMI, diabetes, ethnicity (other thanHispanic, non-Hispanic Black, or non-Hispanic White), chronic obstructive pulmonarydisease, coronary heart disease, and smoking.