Table 1: Characteristics of all T2DM, patients with HH, primary hypogonadism (PH), and with normal testosterone concentration (normal TT/cfT) and nondiabetic control men.

ParameterT2DM with HHT2DM with PHT2DM with normal TT/cfTAll T2DM Nondiabetic control group

Number of patients82599184149
Age (years) NS NS
TT (mmol/L) 0.002 0.001
cfT (nmol/L) 0.002 0.01
SHBG (nmol/L) 0.05 0.05
LH (mIU/L) 0.02 0.02
FSH (mIU/L) 0.02 NS
Estradiol (pg/mL) 0.002 0.001
BMI (kg/m2) 0.05 0.02
HbA1c (%) 0.002 0.002
FPG (mmol/L) 0.05 0.001

shows differences between patients with HH and with normal testosterone levels.
shows differences between TD2M and nonobese control group.
Pearson coefficient of BMI and TT: in all T2DM group.
Pearson coefficient of BMI and cfT: in all T2DM group.
Pearson coefficient of BMI and E2: in all T2DM group.
Pearson coefficient of HbA1c and TT: in all T2DM group.
Pearson coefficient of HbA1c and cfT: in all T2DM group.
Pearson coefficient of HbA1c and E2: in all T2DM group.
Pearson coefficient of FPG and TT: in all T2DM group.