Table 4.
PR and 95% CI for preterm birth, low birthweight, and small for gestational age in women with a breast cancer history
| Preterm birth (<37 weeks) | Low birthweight (<2500 g) | Small for gestational age (<10th percentilec) | |||||||
|---|---|---|---|---|---|---|---|---|---|
| n | Age adjusteda PR (95% CI) | Multivariableb
PR (95% CI) |
n | Age adjusteda PR (95% CI) | Multivariableb PR (95% CI) | n | Age adjusteda
PR (95% CI) |
Multivariableb
PR (95% CI) |
|
| Chemotherapy | |||||||||
| No | 38 | 1.00 | 1.00 | 28 | 1.00 | 1.00 | 26 | 1.00 | 1.00 |
| Yes | 70 | 1.86 (1.31–2.64) | 1.78 (1.25–2.53) | 48 | 1.85 (1.21–2.83) | 1.68 (0.94–3.03) | 42 | 1.80 (1.13–2.85) | 1.72 (0.94–3.15) |
| Time between diagnosis and delivery | |||||||||
| <2 years | 62 | 2.24 (1.34–3.74) | 2.19 (1.31–3.67) | 38 | 1.47 (0.87–2.51) | 1.37 (0.58–3.21) | 26 | 0.88 (0.51–1.53) | 0.89 (0.47–1.68) |
| 2–4.9 years | 30 | 1.11 (0.63–1.95) | 1.11 (0.63–1.96) | 20 | 0.73 (0.40–1.33) | 0.68 (0.28–1.64) | 21 | 0.66 (0.38–1.17) | 0.57 (0.30–1.08) |
| ≥5 years | 16 | 1.00 | 1.00 | 18 | 1.00 | 1.00 | 21 | 1.00 | 1.00 |
| Race/ethnicity | |||||||||
| White, non-Hispanic | 68 | 1.00 | 1.00 | 35 | 1.00 | 1.00 | 27 | 1.00 | 1.00 |
| Black, non-Hispanic | 40 | 1.00 (0.71–1.42) | 0.97 (0.65–1.45) | 41 | 2.02 (1.33–3.05) | 1.76 (1.08–2.86) | 41 | 2.60 (1.66–4.08) | 2.55 (1.53–4.24) |
| Parity | |||||||||
| Primiparous (1 birth) | 28 | 1.00 | 1.00 | 22 | 1.00 | 1.00 | 21 | 1.00 | 1.00 |
| Multiparous (≥2 births) | 80 | 1.27 (0.86–1.86) | 1.10 (0.74–1.64) | 54 | 1.09 (0.69–1.72) | 0.78 (0.47–1.27) | 47 | 0.94 (0.58–1.51) | 0.80 (0.48–1.32) |
aAdjusted for mother’s age at infant delivery
bAdjusted for mother’s age at infant delivery, education, marital status, parity, race/ethnicity, and smoking
cBirthweight of infant is below the tenth percentile for the infant’s gestational age and sex
CI confidence interval, PR prevalence ratio