Table 1

Demographic characteristics of women by BMI, CPS-II, 1982–1998

CovariateBMI <25.0b (n = 182,646)BMI, age adjusted %a 25.0 to <30.0b (n = 83,889)BMI ≥30.0b (n = 34,002)
No.%No.%No.%
Race/Ethnicity
 White17358395.07638791.12926286.1
 Other81924.569838.3454113.4
Age at entry, yr
 <402530.11070.1980.3
 40–491888810.366998.033349.8
 50–597685242.13273939.01404441.3
 60–695579530.52936335.01155834.0
 >693085816.91498117.9496814.6
Family history of ovarian and/or breast cancer
 No16788091.97740892.33157592.9
 Yes147668.164817.724277.1
Height, cm
 <15233801.920832.515424.5
 152 to <157181749.91078612.9524015.4
 157 to <1624840126.52333927.81084231.9
 162 to <1675527330.32251326.8914226.9
 167 to <1724075922.31824721.8524415.4
 172 to <177133107.355966.715874.7
 ≥177 cm33491.813251.64051.2
Age at menarche, yr
 <122386213.11401816.7769122.6
 ≥1215059982.56565878.32462872.4
Age at menopause, yr
 <4045012.522702.710413.1
 40–495494930.12381228.4921427.1
 ≥508015243.93906546.61531045.0
Oral contraceptive use, yr
 Never13790875.56679779.62704179.5
 <5176749.763627.626057.7
 ≥5180839.958196.922296.5
Estrogen replacement therapy, yr
 Nonuser10555557.84957459.12167163.7
 Current oral, <1069943.820852.55691.7
 Current oral, ≥1028101.58441.01800.5
 Former oral, <102271212.4917810.928218.3
 Former oral, ≥1034901.913281.63160.9
No. of full-term pregnancies
 None2257912.4948611.3382511.2
 One1960610.783029.931829.4
 2–38495146.53582342.71326839
 4–94234723.22332827.81081331.8
Exercise
 None36522.022562.715654.6
 Slight3545419.42028924.21066031.4
 Moderate12804870.15480765.31914156.3
 Heavy115366.344315.315994.7
Education
 Less than high school2320712.71648219.6860825.3
 High school graduate5463529.92694032.11080531.8
 Some college5428529.72222226.5823024.2
 College graduate or more4747126.01647919.6555616.3
Cigarette smoking
 Never9055249.64793757.12027959.7
 Current4235523.21356516.2443113.0
 Former3719220.41538718.3619418.2
  • a Percentages are directly adjusted to the age distribution of the entire study population.

  • b Percentages not summing to total reflect missing data.