Laboratory test	Reference range
Free testosterone (1 pg/mL = 3.47 nmol/L)
Men 18–69 y	35.0–155.0 pg/mL
Men > 69 y	30.0–135.0 pg/mL
Total testosterone (1 ng/dL = 0.0347 nmol/L)
Men	> 300 ng/dL
Laboratory test	Reference range for men, 18–150 y old
Creatinine	0.7–1.3 mg/dL
Hemoglobin	12.9–16.1 g/dL
eGFR	≤ 60 mL/min/1.73 m2