Table 3: 1Adjusted regression coefficients and standard errors (SE) for the associations between newborn IGF-I and Birth Weight in African American and White infants.
 Birth weight All ( ) African American ( ) Whites ( ) Maternal BMI < 30 ( ) Maternal BMI ≥ 30 ( ) -coefficient, SE, value -coefficient, SE, value -coefficient, SE, value -coefficient, SE, value -coefficient, SE, value High IGF-I** 230.46, 58.0, 0.0001 280.98, 90.24, 0.002 202.05, 89.72, 0.02 122.31, 62.65, 0.05 617.78, 134.68, <0.0001 Female infants*** −51.7, 55.68, 0.35 67.36, 80.54, 0.40 −172.47, 90.08, 0.06 −137.68, 62.1, 0.03 146.20, 111.10, 0.19 White Race**** 240.60, 63.07, 0.0002 — — 202.11, 46.26, <0.0001 35.21, 87.27, 0.68 High maternal BMI (≥30)∧ 201.68, 62.55, 0.001 261.81, 82.95, 0.002 161.64, 125.81, 0.2 — — Gestational age at delivery∧ ∧ 205.92, 23.84, <0.0001 206.58, 35.92, <0.0001 172.63, 37.79, <0.0001 213.25, 24.9, <0.0001 187.13, 54.47, 0.001 Smoking during Pregnancy∧ ∧∧ −8.11, 31.02, 0.79 −5.90, 47.40, 0.90 −39.63, 47.26, 0.40 −46.36, 33.28, 0.16 2.36, 68.16, 0.97 Delivery route∧ ∧∧ ∧ 151.57, 56.58, 0.008 229.73, 84.34, 0.008 74.06, 86.27, 0.40 146.23, 62.58, 0.03 178.73, 111.78, 0.11
Factors mutually adjusted for each other: IGF-I levels, infant gender, race, maternal BMI, maternal smoking, delivery route, and gestational age at delivery, to predict birth weight.
**Referents are individuals with lower (≤3rd Tertile) IGF-I at delivery.
***Referents are male infants.
****Referents are African Americans.
Referents are BMI < 30.
Referents are lower gestational age.
Referents are nonsmoking mothers.
Referents are vaginal delivery infants.