TABLE 6.
| Variables | Head circumference Z-score | |
|---|---|---|
| <−2 | ≥2 to <−1 | |
| Birthweight Z-score<−2 | 14 (7.7–27) | 3.6 (1.9–6.8) |
| Maternal or fetal indication | 3.8 (2.0–7.3) | 2.4 (1.6–3.6) |
| Female | 2.3 (1.3–4.0) | 1.7 (1.2–2.2) |
| Placenta infarct | 2.0 (1.03–3.7) | 1.6 (1.1–2.4) |
| Nonwhite race | 1.9 (1.1–3.5) | 1.5 (1.03–2.0) |
| Unmarried | 1.9 (1.00–3.5) | 1.7 (1.2–2.5) |
| Vaginal organism | 1.4 (0.6–3.3) | 1.4 (0.9–2.0) |
| Tobacco smokea | 1.2 (0.7–2.2) | 1.1 (0.8–1.5) |
| Any antenatal corticosteroid | 1.1 (0.5–2.9) | 1.7 (0.99–2.9) |
| Gestational age 25–26 wk | 1.1 (0.6–2.1) | 1.2 (0.8–1.7) |
| Gestational age 23–24 wk | 0.5 (0.2–1.1) | 1.2 (0.8–1.8) |
| NSAIDs | 0.3 (0.1–1.3) | 1.0 (0.6–1.8) |
Odds ratios (point estimates and 95% confidence intervals) for each small head circumference entity associated with each of antecedents and characteristics listed on left in models of that contain all other variables in this table.
NSAIDs, nonsteroidal antiinflammatory drugs.
a
During pregnancy and exposure to smoke of others.
McElrath. Factors associated with small head circumference at birth among ELGAN. Am J Obstet Gynecol 2010.