Table 3. Multivariable Regression Coefficients for Systolic Blood Pressure in Multiple Regression Models of Key Left Ventricular Parameters Within Gestational Age Group Categories^a.

CMR parameters	Model	Very and extremely preterm-born adults (<32 wk gestation)				Moderately preterm-born adults (32-36 wk gestation)				Term-born adults (≥37 wk gestation)
		B (per 1–mm Hg SBP)	95% CI		P value	B (per 1–mm Hg SBP)	95% CI		P value	B (per 1–mm Hg SBP)	95% CI		P value
			Lower bound	Upper bound			Lower bound	Upper bound			Lower bound	Upper bound
Myocardium Mass/BSA, g/m2	Unadjusted	0.475	0.297	0.654	<.001	0.281	0.135	0.427	<.001	0.288	0.189	0.387	<.001
	Adjusted	0.394	0.213	0.574	<.001	0.250	0.113	0.387	<.001	0.157	0.060	0.254	.002
Ejection fraction, %	Unadjusted	0.068	−0.036	0.171	.20	−0.010	−0.102	0.082	.84	0.066	0.010	0.123	.02
	Adjusted	0.100	−0.015	0.216	.09	−0.031	−0.129	0.067	.53	0.079	0.017	0.140	.01
ED volume/BSA, mL/m2	Unadjusted	0.170	0.010	0.330	.04	0.192	−0.001	0.386	.05	0.139	0.005	0.273	.04
	Adjusted	0.157	−0.016	0.329	.07	0.179	−0.011	0.393	.07	0.092	−0.043	0.228	.18
Mass/ED volume, g/mL	Unadjusted	4.47 × 10−3	2.16 × 10−3	6.78 × 10−3	<.001	1.53 × 10−3	−5.40 × 10−5	3.12 × 10−3	.06	2.44 × 10−3	1.22 × 10−3	3.67 × 10−3	<.001
	Adjusted	3.56 × 10−3	1.01 × 10−3	6.11 × 10−3	.007	1.04 × 10−3	−6.83 × 10−4	2.74 × 10−3	.24	1.08 × 10−3	−2.31 × 10−4	2.40 × 10−3	.11

Abbreviations: B, unstandardized coefficients with 95% confidence intervals; BSA, body surface area; CMR, cardiac magnetic resonance; ED, end-diastole; SBP, systolic blood pressure.

^aThe regression coefficients for systolic blood pressure with the individual CMR parameters (dependent variables) are shown for both unadjusted (bivariate) and adjusted (multivariable) regression models. In multivariable models, independent variables were systolic blood pressure, age, sex, birth weight z score, and body mass index (multivariable regression coefficients shown for systolic blood pressure).