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Table 3 OR (95% CI) of combined effect of paternal age and maternal ages on risk of breast cancer [cases/controls]

From: Association of paternal age at birth and the risk of breast cancer in offspring: a case control study

Paternal age (yrs) Maternal age (yrs)
  <25 25–29 30–34 ≥35
<30 1.0
[230/273]
1.3 (0.97–1.81)
[122/116]
1.1 (0.45–2.86)
[9/10]
1.1 (0.07–17.69)
[1/1]
30–34 1.2 (0.76–1.87)
[46/47]
1.3 (0.96–1.76)
[132/127]
1.3 (0.91–1.89)
[81/79]
1.1 (0.38–2.97)
[7/8]
35–39 1.6 (0.55–4.81)
[8/6]
1.1 (0.67–1.70)
[41/46]
1.4 (1.00–2.07)
[83/74]
0.9 (0.55–1.42)
[37/48]
≥40 0.3 (0.04–3.07)
[1/4]
1.2 (0.43–3.60)
[7/8]
2.8 (1.74–4.62)
[64/29]
1.3 (0.96–1.75)
[142/135]
  1. OR adjusted for family history of breast cancer in 1st or 2nd degree relatives and lifetime estrogen exposure duration
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