Higher body roundness index (BRI) increases infertility among U.S. women aged 18–45 years

BMC Endocrine Disorders

Table 2 Adjusted odds ratios (ORs) of BRI and infertility, weighted

BRI	Model 1 [OR (95% CI)]	p-value	Model 2 [OR (95% CI)]	p-value	Model 3 [OR (95% CI)]	p-value
Continuous (Per 1 unit increase)	1.14 (1.09, 1.20)	< 0.001	1.13 (1.07, 1.20)	< 0.001	1.12 (1.05, 1.19)	< 0.001
Quartile
Q1	1 (ref.)		1 (ref.)		1 (ref.)
Q2	1.48 (1.00, 2.19)	0.053	1.23 (0.79, 1.90)	0.300	1.31 (0.83, 2.05)	0.200
Q3	2.08 (1.32, 3.26)	0.002	1.71 (1.03, 2.83)	0.039	1.72 (0.98, 3.02)	0.057
Q4	3.14 (1.95, 5.06)	< 0.001	2.62 (1.51, 4.52)	0.001	2.60 (1.52, 4.44)	0.001
P for trend	< 0.001		0.001		0.001

Model 1: no covariates were adjusted
Model 2: age, education level, marital, PIR, and race were adjusted
Model 3: age, education level, marital, PIR, race, smoking, drinking, hypertension, diabetes, and high cholesterol were adjusted
Abbreviation: BRI, body roundness index; PIR, Ratio of family income to poverty; ORs, odds ratios; CI, confidence interval

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