Table 1.
Maternal and Infant Characteristics by SEP and Infant Sex
| Maternal Characteristics | ||||
|---|---|---|---|---|
|
| ||||
| Low SEP/ Male | Low SEP/ Female | High SEP/ Male | High SEP/ Female | |
|
| ||||
| Mean (SD)/% | Mean (SD)/% | Mean (SD)/% | Mean (SD)/% | |
| Age (years) | 23 (4) | 25 (6) | 28 (5) | 28 (5) |
| Gravida | 3 (1) | 3 (2) | 2 (1) | 2 (1) |
| Education (% < High School) | 31% | 39% | 3% | 3% |
| Race (% White) | 8% | 42% | 52% | 57% |
| Annual Income (% < $10K) | 26% | 39% | 8% | 7% |
| Marital Status (% married) | 6% | 6% | 61% | 62% |
| Pre-pregnancy BMI* | 26 (7) | 28 (8) | 26 (7) | 25 (6) |
| Cigarettes in pregnancy | 113 (348) | 41 (166) | 23 (111) | 11 (49) |
| Units of alcohol in pregnancy | 6 (13) | 5 (9) | 7 (10) | 7 (12) |
| Hypertension (%yes) | 3% | 3% | 7% | 6% |
| Gestational Diabetes (%yes) | 11% | 0% | 7% | 10% |
| Infant Characteristics | ||||
|---|---|---|---|---|
|
| ||||
| Low SEP/ Male | Low SEP/ Female | High SEP/ Male | High SEP/ Female | |
|
| ||||
| Mean (SD)/% | Mean (SD)/% | Mean (SD)/% | Mean (SD)/% | |
| Gestational Length (weeks) | 39 (4) | 39 (1) | 39 (1) | 40 (1) |
| Birth Weight (kilograms) | 2.14 (0.76) | 3.24 (0.47) | 3.45 (0.49) | 3.38 (0.45) |
| APGAR score at 5 minutes | 9 (1) | 9 (0.3) | 9 (0.5) | 9 (1) |
Note.
*
BMI = Body mass index.