Table 1.

Distribution of select characteristics according to adult BMI among women with invasive breast cancer

CharacteristicAll (N = 3,924) %Adult BMI (kg/m2)
≤22.99 (n = 2,331), %23.00-24.99 (n = 666), %25.00-29.99 (n = 664), %≥30.00 (n = 263), %
Age at diagnosis (y)*
Menopausal status*
    Natural menopause13.111.415.616.015.2
    Surgical menopause—no ovaries7.
    Surgical menopause— ≥1 ovary14.113.814.714.015.2
First-degree family history of breast cancer11.712.211.710.79.5
Frequency of breast examinations
    At least once per month24.523.426.925.227.0
    Several times a year26.226.426.025.327.4
    Once per year or less49.150.146.949.145.6
Previous mammogram16.116.017.617.311.0
Frequency of Pap smears*
    At least once per year72.275.371.967.357.0
    Less than once per year27.724.528.132.442.6
History of benign breast disease16.117.316.513.611.4
Cancer stage at diagnosis*
Histologic type
Radiation therapy22.423.322.820.319.4
Educational level (y)*
Number of comorbidities*,§
  • NOTE: Because of rounding or missing information, some column percentages do not add to 100.

  • * P < 0.001: Pearson χ2 test.

  • Before being diagnosed with a breast problem (lumps, cysts, or other problem).

  • P < 0.05: Pearson χ2 test.

  • § Diabetes, high blood pressure, blood clots, kidney disease, gallbladder disease, heart attack, paralysis, rheumatoid arthritis, stroke, other cancer.