Table 5.

Multivariate logistic regression was used to determine the associations between WHR and the risk of primary and secondary infertility for US women aged 20–45 years, weighted (adjusted model)

Variable	Primary population (n = 859)		Secondary population (n = 959)
	OR (95% CI)	p value	OR (95% CI)	p value
WHRa	1.04 (0.86–1.24)	0.68	1.66 (1.14–2.40)	0.01
Binary variable
WHR <0.85	1.00(reference)		1.00 (reference)
WHR ≥0.85	1.05 (0.78–1.41)	0.68	2.75 (1.35–5.59)	0.01

Data presented are OR and 95% CI.

Adjusted model: age, race and ethnicity, educational level, marital status, PIR, hypertension, diabetes, regular menstrual periods, trouble sleeping, and smoking status.

WHR, waist-hip ratio; OR, odds ratio; 95% CI, 95% confidence interval.

^aThe OR was examined by per 0.1-unit increase of WHR.