Table 6.

Multivariable associations affecting uterine venous diameter (N = 1014)

Model	Variable	Category	Ratio (95% CI)	P value
1	Parity	0	1	< 0.001
		1	1.12 (1.06, 1.18)
		2	1.17 (1.12, 1.23)
		3	1.26 (1.19, 1.33)
		4 +	1.29 (1.20, 1.38)
	Menopausal status	Pre	1	< 0.001
		Post	0.84 (0.80, 0.88)
	Ethnicity	White	1	0.02
		Asian	0.95 (0.89, 1.01)
		Black	1.06 (1.01, 1.12)
		Middle Eastern	0.98 (0.91, 1.05)
		Mixed/other	0.95 (0.88, 1.02)
	Fibroids	No	1	0.003
		Yes	1.06 (1.02, 1.09)
2	Parity	0	1	< 0.001
		1	1.13 (1.07, 1.19)
		2	1.18 (1.13, 1.24)
		3	1.27 (1.20, 1.34)
		4 +	1.31 (1.22, 1.40)
	Menopausal status	Pre	1	< 0.001
		Post	0.85 (0.81, 0.88)
	Ethnicity	White	1	0.03
		Asian	0.94 (0.88, 1.00)
		Black	1.04 (0.99, 1.10)
		Middle Eastern	0.98 (0.91, 1.05)
		Mixed/other	0.94 (0.87, 1.01)
	Fibroids	No fibroids	1	< 0.001
	(by mean	≤ 50 mm	1.03 (0.99, 1.07)
	diameter)	> 50 mm	1.22 (1.14, 1.30)