Table 1

 Comparison of cases and controls for demographic and lifestyle factors

Cases (n = 405),n (%)Controls (n = 392), n (%)
BMI, body mass index; BPH, benign prostatic hyperplasia; DRE, digital rectal examination; PSA, prostate specific antigen.
Age (years)
    65–69188 (46.4)170 (43.4)
    70–74130 (32.1)114 (29.1)
    75–7987 (21.5)108 (27.6)
    Data missing00
Race
    African-American166 (41.0)167 (42.6)
    Caucasian239 (59.0)225 (57.4)
    Data missing00
Region
    Low country228 (56.3)220 (56.1)
    Midlands104 (25.7)86 (21.9)
    Upstate73 (18.0)86 (21.9)
    Data missing00
Education
    < 8th grade102 (25.4)84 (21.4)
    Grades 9–1153 (13.2)64 (16.3)
    High-school graduate98 (24.4)90 (23.0)
    Some college/technical school53 (13.2)70 (17.9)
    College graduate95 (23.7)84 (21.4)
    p Value for trend0.39
    Data missing40
BMI(kg/m2)
    <24.490 (22.8)90 (23.6)
    24.4–27.2114 (28.9)100 (26.2)
    27.3–29.896 (24.3)96 (25.1)
    ⩾29.995 (24.1)96 (25.1)
    p Value for trend0.67
    Data missing1010
Family history
    No277 (69.8)328 (84.5)
    Yes120 (30.2)60 (15.5)
    Data missing84
History of BPH
    No239 (59.9)287 (73.8)
    Yes160 (40.1)102 (26.2)
    Data missing63
Number of PSA tests in the past 5 years
    059 (14.6)85 (21.7)
    1–2127 (31.4)142 (36.3)
    3–464 (15.8)64 (16.4)
    ⩾5155 (38.3)100 (25.6)
    p Value for trend<0.001
    Data missing01
Number of DRE tests in the past 5 years
    046 (11.4)48 (12.3)
    1–281 (20.0)107 (27.4)
    3–475 (18.5)81 (20.7)
    ⩾5203 (50.1)155 (39.6)
    p Value for trend0.02
    Data missing01