Table 1.

Characteristics of 427 endometrial cancer patients and 427 hospital controls—Roswell Park Cancer Institute (1982-1998)

CharacteristicCases, n (%)Controls, n (%)P*
Non-Hispanic Caucasian418 (97.9)422 (98.8)not significant
College graduate73 (17.1)86 (20.2)not significant
First-degree relative with endometrial cancer1 (0.2)1 (0.2)not significant
Ever smoked cigarettes regularly158 (37.1)184 (43.5)0.057
Postmenopausal402 (95.7)369 (88.7)<0.001
Ever used oral contraceptives62 (14.8)82 (19.5)0.07

Mean (SD)
Mean (SD)
P
Age (y)62.2 (11.7)62.1 (11.8)not significant
Year completed questionnaire1988 (4.4)1987 (4.1)<0.001
Usual BMI (kg/m2)29.9 (8.4)25.8 (5.7)<0.001
Age at onset of menses (y)12.7 (1.6)13.0 (1.6)0.007
Age at first pregnancy (y)23.3 (4.8)23.3 (4.7)not significant
Age at first birth (y)23.9 (4.7)23.9 (4.6)not significant
Lifetime duration of breast-feeding (mo)3.8 (8.8)4.7 (10.7)not significant
Number of liveborn children2.3 (1.7)2.6 (1.9)0.04
Age at menopause (y)48.8 (5.9)46.2 (7.1)<0.001
  • * Significance tested using χ2 or Fisher's exact test, as appropriate.

  • Significance tested using two-tailed Student's t test.

  • Among postmenopausal women.