TABLE 4.

Predictive multiple linear regression models of log-transformed maternal ⁵⁷Fe utilization (%) in the third trimester¹

Variable	β (SE)	P value
Weighted (R2 = 0.37)
Prepregnancy obese (BMI: ≥30.0)	−0.01 (0.26)	0.96
Age, y	0.01 (0.02)	0.72
Some college vs. high school or less	0.46 (0.40)	0.26
College and beyond vs. high school or less	0.97 (0.50)	0.06
non-Hispanic black vs. other	0.15 (0.36)	0.87
Single vs. married/cohabitating	−0.10 (0.27)	0.45
Gravida ≥2	0.58 (0.28)	0.05
Total dietary iron, mg/1000 kcal	0.002 (0.004)	0.63
Unweighted (R2 = 0.25)
Prepregnancy obese (BMI: ≥30.0)	−0.11 (0.28)	0.71
Age, y	0.20 (0.03)	0.93
Some college vs. high school or less	0.35 (0.29)	0.29
College and beyond vs. high school or less	0.28 (0.41)	0.51
Non-Hispanic black vs. other	0.04 (0.25)	0.86
Single vs. married/cohabitating	−0.41 (0.31)	0.22
Gravida ≥2	0.46 (0.26)	0.10
Total dietary iron, mg/1000 kcal	0.002 (0.003)	0.49

¹Values are βs (SEs), are unstandardized regression coefficient and standard error unless otherwise indicated.