Clinical Study
Maternal BMI, IGF-I Levels, and Birth Weight in African American and White Infants
Table 1
Characteristics of study participants.
| | Characteristic | Birth weight | | <2500 g () | 2500–4000 g () | >4000 () | value |
| | Maternal age at enrollment (yrs) | | | | 0.79 | | 18–25 () | 4 (40%) | 67 (31%) | 6 (28.5%) | | | 26–30 () | 4 (40%) | 65 (30%) | 6 (28.5%) | | | >30 () | 2 (20%) | 86 (39%) | 9 (43%) | | | Maternal BMI before pregnancy | | | | 0.17 | | <30 () | 7 (87.5%) | 140 (71%) | 11 (55%) | | | ≥30 () | 1 (12.5%) | 56 (29%) | 9 (45%) | | | Mean BMI | 26.61 (SD = 4.8) | 28.4 (SD = 9.4) | 31.3 (SD = 12.3) | 0.37 | | Race/ethnicity | | | | 0.1 | | African American () | 8 (89%) | 110 (51%) | 8 (38%) | | | White () | 1 (11%) | 85 (39%) | 9 (43%) | | | Other () | 0 (0%) | 21 (9.7%) | 4 (19%) | | | Education | | | | 0.18 | | <High School HS Graduate/GED () | 6 (67%) | 79 (39%) | 9 (43%) | | | Some College/College Graduate/ | 3 (33%) | 136 (63%) | 12 (57%) | | Graduate education () | | Maternal smoking | | | | 0.14 | | Never smoked () | 2 (20%) | 120 (55%) | 13 (62%) | | | Smoked during pregnancy () | 3 (30%) | 36 (17%) | 1 (5%) | | | Quit smoking before pregnancy () | 5 (50%) | 62 (28%) | 7 (33%) | | | Gender of infant | | | | 0.12 | | Male () | 5 (50%) | 86 (39%) | 13 (62%) | | | Female () | 5 (50%) | 132 (61%) | 8 (38%) | | | Delivery route | | | | 0.75 | | Vaginal () | 7 (70%) | 131 (61%) | 10 (48%) | | | Caesarean section () | 3 (30%) | 86 (39%) | 11 (52%) | | | Gestational age at delivery in weeks | | | | 0.006 | | Mean (SD) | 37 (0.22) | 39 (1.11) | 39 (0.93) | | | IGF-I | | | | 0.12 | | ≤3rd Tertile () | 5 (50%) | 153 (70%) | 11 (52%) | | | >3rd Tertile () | 5 (50%) | 65 (30%) | 10 (48%) | |
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Numbers do not necessarily add up due to missing values.
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