Table 1.

Characteristics of prostate cancer cases and matched controls, CLUE II, 1989

CasesControlsP*
No. of men264264
Mean age at baseline (y)64.6 ± 9.064.6 ± 9.0Matched
African American (%)2.32.3Matched
Married (%)88.385.20.30
Smoking status (%)
    Never39.438.3
    Former51.953.00.89
    Current8.78.7
Family history of prostate cancer in 1996 (%)13.59.80.29
PSA test as of 1996 (%)89.181.60.05
Mean attained education (y)12.4 ± 3.412.1 ± 3.40.35
Mean height (inches)69.3 ± 2.669.5 ± 2.40.27
Mean BMI (kg/m2)26.4 ± 3.526.7 ± 3.20.26
BMI at age 21 y (kg/m2)§22.4 ± 3.222.7 ± 3.20.35
Mean intake
    Energy (kcal/d)1,583 ± 6261,559 ± 5230.67
    Alcohol (g/d)6.5 ± 12.66.3 ± 12.80.86
    Tomato products (servings/d)0.45 ± 0.360.48 ± 0.410.50
    Red/processed meat (servings/d)0.71 ± 0.480.73 ± 0.480.63
    Fish (servings/d)0.09 ± 0.100.10 ± 0.130.30
    Calcium from diet plus supplements (mg/d)798 ± 467819 ± 4750.64
Use of vitamin E supplements (%)9.99.80.87
Use of aspirin or nonsteroidal anti-inflammatory agents within 48 h before blood draw (%)32.634.90.57
Use of diabetes medications within 48 h before blood draw (%)1.94.60.09

NOTE: The data are baseline information unless otherwise specified.

  • *P value from a paired t test (continuous) or McNemar's test (categorical), unless otherwise specified.

  • Among men (170 cases, 173 controls) who responded to the 1996 questionnaire and provided information; P value from the χ2 test.

  • Among men (184 cases, 174 controls) who responded to the 1996 questionnaire and provided information; P value from the χ2 test.

  • §Among men with information on BMI at age 21 (264 cases, 262 controls).

  • Among men who returned the food frequency questionnaire and provided valid data; P value from the t test.