Association of basal serum testosterone levels with ovarian response and in vitro fertilization outcome

Table 4 Multiple linear regression analysis of possible determinants for total dose of gonadotropins in Group 1

	Coefficients
	Unstandardized coefficients		Standardized coefficients
Independent variables	β	Std. Error	β	t	P value
(constant)	-464.984	819.634		-0.567	0.571
Age (years)	-8.988	18.659	-0.032	-0.482	0.631
BMI (kg/m²)	40.781	25.082	0.098	1.626	0.106
Basal T levels (ng/dl)	-8.833	3.516	-0.145	2.512	0.013
Basal FSH level (IU/L)	89.904	31.525	0.166	2.852	0.005
Antral follicle count	-26.244	13.797	-0.109	-1.902	0.059
Starting dose of gonadotropins (IU)	9.633	1.168	0.531	8.244	<0.001

Note: The dependent variable is total dose of gonadotropins. The model (r = 0.647, r² = 0.419, adjusted r² = 0.399, P < 0.001).
The values of the standardized coefficients reflect the independent contributions of each predictor to dependent variables.