Table 3. Univariate correlations between kisspeptin concentration and anthropometric and metabolic variables.

	Whole study group		Subjects with NGT (N = 159)		Subjects with IGT (N = 102)
	Kisspeptin		Kisspeptin		Kisspeptin
	r	P	r	P	r	P
Age (years)	0.18	0.007	0.17	0.01	0.07	0.22
BMI (kg/m2)	-0.12	0.04	-0.13	0.04	-0.11	0.11
Waist circumference (cm)	-0.12	0.04	-0.10	0.10	-0.13	0.08
Systolic blood pressure (mmHg)	0.09	0.09	0.07	0.16	0.05	0.30
Diastolic blood pressure (mmHg)	0.17	0.007	0.15	0.02	0.10	0.16
Total cholesterol (mg/dl)	0.08	0.10	0.03	0.36	0.12	0.11
HDL cholesterol (mg/dl)	-0.01	0.48	-0.06	0.19	-0.13	0.09
Triglycerides (mg/dl)	0.07	0.15	0.10	0.09	0.06	0.29
Fasting glucose (mg/dl)	0.07	0.14	0.05	0.27	0.01	0.49
2-h glucose (mg/dl)	0.12	0.03	0.12	0.06	0.01	0.49
Fasting insulin (μU/ml)	-0.10	0.06	-0.16	0.02	-0.01	0.37
IGF-1(ng/ml)	-0.09	0.10	-0.10	0.11	-0.04	0.34
Matsuda Insulin Sensitivity index (mg x L2 x mmol-1 x mU-1 x min-1)	0.01	0.41	0.05	0.23	0.01	0.48
Insulinogenic index (ΔIns30/ΔGluc30)(μU/ml per mg/dl)	-0.24	<0.0001	-0.25	0.001	-0.17	0.04
Stumvoll 1st phase index (pmol/l)	-0.21	0.001	-0.22	0.003	-0.16	0.05
Stumvoll 2nd phase index (pmol/l)	-0.20	0.002	-0.21	0.004	-0.15	0.05
CIR30	-0.23	<0.0001	-0.25	0.001	-0.16	0.05
Disposition index (ΔIns30/ΔGluc30 x Matsuda index)	-0.20	0.002	-0.22	0.003	-0.17	0.05

NGT = normal glucose tolerance; IGT = impaired glucose tolerance; BMI = body mass index; HDL = high density lipoprotein; IGF-1 = insulin-like growth factor 1; CIR₃₀ = corrected insulin response.