Prevalence of preterm, low birthweight, and small for gestational age delivery after breast cancer diagnosis: a population-based study

Table 3 PR and 95% CI for preterm birth, low birthweight, and small for gestational age stratified by race/ethnicity

Race/ethnicity	Breast cancer history	Preterm birth^a (<37 weeks)		Low birthweight^a (<2500 g)		Small for gestational age^a (<10th percentile^c)
Race/ethnicity	Breast cancer history	n	PR (95% CI)^b	n	PR (95% CI)^b	n	PR (95% CI)^b
Black, non-Hispanic	No	75,286	1.00	71,159	1.00	90,006	1.00
Black, non-Hispanic	Yes	40	1.31 (1.00–1.72)	41	1.49 (1.14–1.94)	41	1.44 (1.11–1.87)
White, non-Hispanic	No	130,740	1.00	97,273	1.00	123,182	1.00
White, non-Hispanic	Yes	68	2.06 (1.67–2.54)	35	1.53 (1.12–2.08)	27	1.10 (0.77–1.58)
Black, non-Hispanic^d	No	75,286	1.45 (1.44–1.47)	71,159	1.82 (1.80–1.84)	90,006	1.82 (1.80–1.83)
Black, non-Hispanic^d	Yes	40	1.90 (1.45–2.50)	41	2.71 (2.08–3.54)	41	2.62 (2.01–3.40)

^a P interaction of race/ethnicity and breast cancer history is 0.01 for preterm birth, 0.9 for low birthweight, and 0.2 for small for gestational age
^bAdjusted for mother’s age at infant delivery, education, marital status, parity, and smoking
^cBirthweight of infant is below the tenth percentile for the infant’s gestational age and sex
^dWhite women with no breast cancer history serve as the reference group for these comparisons
CI confidence interval, PR prevalence ratio

ISSN: 1465-542X