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Table 2 Age adjusted and multivariable PR and 95% CI for preterm birth, low birthweight, and small for gestational age

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

  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)
Breast cancer history
 Nod 206,026 1.00 1.00 168,432 1.00 1.00 213,188 1.00 1.00
 Yes 108 1.89 (1.60–2.24) 1.67 (1.42–1.97) 76 1.76 (1.43–2.16) 1.50 (1.23–1.84) 68 1.48 (1.19–1.85) 1.30 (1.05–1.61)
Chemotherapy
 No 38 1.31 (0.98–1.76) 1.17 (0.87–1.56) 28 1.28 (0.90–1.82) 1.10 (0.78–1.55) 26 1.14 (0.79–1.64) 0.98 (0.68–1.40)
 Yes 70 2.48 (2.03–3.03) 2.17 (1.79–2.63) 48 2.24 (1.73–2.89) 1.92 (1.50–2.45) 42 1.83 (1.39–2.40) 1.63 (1.25–2.13)
Time between diagnosis and delivery
 <2 years 62 2.86 (2.33–3.52) 2.58 (2.12–3.15) 38 2.29 (1.72–3.04) 2.16 (1.64–2.85) 26 1.43 (1.00–2.04) 1.36 (0.96–1.92)
 2–4.9 years 30 1.36 (0.98–1.90) 1.20 (0.86–1.66) 20 1.20 (0.79–1.82) 0.98 (0.65–1.47) 21 1.20 (0.80–1.79) 0.97 (0.66–1.44)
 ≥5 years 16 1.19 (0.75–1.87) 1.04 (0.66–1.63) 18 1.79 (1.17–2.74) 1.49 (0.98–2.26) 21 2.08 (1.41–3.06) 1.85 (1.27–2.71)
  1. aAdjusted for mother’s age at infant delivery
  2. bAdjusted for mother’s age at infant delivery, education, marital status, parity, race/ethnicity, and smoking
  3. cBirthweight of infant is below the tenth percentile for the infant’s gestational age and sex
  4. dWomen with no breast cancer history serve as the reference group for all comparisons
  5. CI confidence interval, PR prevalence ratio