Table 1

Selected characteristics of breast cancer cases and controls in Connecticut

CharacteristicsCases (n = 475)Controls (n = 502)ORa95% CI
Age (years)
≤45821101.0
>453933921.20.9–1.7
Age at menarche (years)
≥1557541.0
13–141902100.80.6–1.3
<132272370.90.6–1.3
Unknown11
Age at first full pregnancy (years)
<2042551.0
20–252112041.50.9–2.3
≥261621651.50.9–2.5
Nulliparous60781.20.7–2.1
Lifetime lactation (months)
03012971.0
1–10941110.80.5–1.1
≥1180940.80.6–1.2
Family breast cancer history
No3914291.0
Yes84731.30.9–1.8
BMI (kg/m2)
<21.067841.0
21.0–24.91832051.10.8–1.6
≥25.02252131.20.8–1.8
Fat intake (g/day)
<461381771.0
46–711751661.41.0–1.9
≥721501521.30.9–1.7
Unknown1272.71.0–7.2
Annual income ($)
<20,0002432561.0
20,000–24,99940460.90.5–1.4
≥25,000731010.80.5–1.1
Unknown119991.20.9–1.7
Race
White4304611.0
Black31281.20.7–2.1
Other14131.10.5–2.4
  • a ORs for each selected characteristic were adjusted for all other selected characteristics listed in Table 1<$REFLINK> .