Table 3.

Multivariate linear regression analysis of influencing factors of HHI in infertile women undergoing IVF-ET

Variables	Non standardized coefficient B	Standard error	Standardized coefficient β	t	P	95% Confidence interval
Constant	30.288	2.066	–	14.664	< 0.001	26.223 ~ 34.353
Repeated IVF-ET	− 0.859	0.141	− 0 0.291	− 6.095	< 0.001	− 1.136 ~ − 0.581
MAT	0.045	0.009	0.288	5.266	< 0.001	0.028 ~ 0.062
SSRS	0.117	0.031	0.198	3.802	< 0.001	0.057 ~ 0.178
Age	− 0.223	0.059	− 0.242	− 3.779	< 0.001	− 0.339 ~ -0.107
Marriage age	0.275	0.064	0.274	4.306	< 0.001	0.150 ~ 0.401
Monthly income	0.516	0.220	0.114	2.349	0.020	0.084 ~ 0.949
Education level	1.474	0.478	0.147	3.081	0.002	0.532 ~ 2.416

R² = 0.487, adjusted R2 = 0.475, P < 0.05