Table II.

Average difference (β) in LV structure and function measures by MRI per 1 greater category of number of live births (0, 1, 2, 3, 4, ≥5^*) in the MESA

	LV mass (g), β ± SE (P value)	LVEDV (mL), β ± SE (P value)	LVESV (mL), β ± SE (P value)	Stroke volume (mL), β ± SE (P value)	LV mass/volume (g/mL), β ± SE (P value)	LVEF (%),β ± SE (P value)
Model 1	1.06 ± 0.34 (.002)	0.56 ± 0.3 (.06)	0.4 ± 0.15 (.008)	0.16 ± 0.22 (.45)	0.004 ± 0.003 (.09)	−0.18 ± 0.08 (.04)
Model 2	1.26 ± 0.34 (.0002)	0.74 ± 0.29 (.01)	0.45 ± 0.15 (.003)	0.29 ± 0.21 (.18)	0.004 ± 0.003 (.13)	−0.18 ± 0.09 (.04)
Model 3	0.6 ± 0.28 (.03)	0.27 ± 0.27 (.31)	0.31 ± 0.15 (.04)	−0.04 ± 0.19 (.86)	0.003 ± 0.003 (.31)	−0.17 ± 0.09 (.05)
Model 2 sensitivity analysis (excluding lowest socioeconomic strata†)	1.78 ± 4.04 (<.0001)	1.02 ± 2.6 (.01)	0.49 ± 2.42 (.02)	0.52 ± 1.84 (.07)	0.01 ± 1.58 (.11)	−0.16 ± −1.41 (.16)

Model 1 covariates: age and race; model 2 covariates: age, race, height, income category, education, place of birth, cigarette use, menopausal status, and oral contraceptive use; model 3 covariates: model 2 covariates + systolic blood pressure, antihypertensive medication use, total/HDL cholesterol, triglycerides, diabetes, and body mass index.

^*The highest parity category (ie, 6) represents the median number in the ≥5 births category.

^†Subset of n =1,471 women with at least high school educational level and with annual household income ≥$20,000.