Serum leptin level in Sudanese women with unexplained infertility and its relationship with some reproductive hormones

Table 3 Predictors of serum leptin levels in Sudanese women using the best-fit model

Independent variable	Model, leptin ng mL	Coefficients	P value	Beta, 95%CI
				Lower	Upper
Constant	Unexplained infertility	6.812	0.274	-5.436	19.060
	Fertile	-1.076	0.527	-4.426	2.274
Age	Unexplained infertility	0.011	0.529	-0.023	0.044
	Fertile	0.002	0.734	-0.009	0.012
BMI	Unexplained infertility	0.013	0.794	-0.085	0.111
	Fertile	-0.003	0.813	-0.031	0.025
WHR	Unexplained infertility	-0.099	0.957	-3.739	3.541
	Fertile	-0.096	0.858	-1.155	0.962
FSH in IU/L	Unexplained infertility	-0.122	0.479	-0.460	0.216
	Fertile	-0.037	0.754	-0.196	0.269
LH in IU/L	Unexplained infertility	-0.139	0.223	-0.364	0.085
	Fertile	0.009	0.951	-0.307	0.288
LH/FSH	Unexplained infertility	1.212	0.070	-0.100	2.524
	Fertile	0.182	0.892	-2.455	2.819
PRL in μg/L	Unexplained infertility	0.471	< 0.001a	0.369	0.573
	Fertile	0.026	0.082	-0.003	0.056
AMH in ng/mL	Unexplained infertility	2.981	< 0.001a	2.032	3.930
	Fertile	-0.062	0.538	-0.261	0.137
E2 in nmol/L	Unexplained infertility	-0.006	0.915	-0.109	0.098
	Fertile	-0.007	0.274	-0.021	0.006
T in nmol/L	Unexplained infertility	3.192	0.235	-2.087	8.472
	Fertile	10.982	< 0.001a	10.008	11.956
E2/T ratio	Unexplained infertility	0.028	0.813	-0.204	0.260
	Fertile	0.018	0.272	-0.014	0.050

^aP < 0.05.

AMH: Anti-Mullerian hormone; BMI: Body mass index; CI: Confidence interval; E2: Estradiol; FSH: Follicular stimulating hormone; LH: Luteinizing hormone; PRL: Prolactin hormone; T: Testosterone; WHR: Waist/hip ratio.