Table 1.

Distributions and age-adjusted ORs and 95% CIs for selected characteristics among prostate cancer cases and controls, King County, Washington, 1993-1996

CharacteristicNo. cases (%), n = 630No. controls (%), n = 565OR (95% CI)*
Age (y)
    40-4940 (6.4)51 (9.0)1.00 (reference)
    50-54129 (20.5)114 (20.2)1.44 (0.89-2.34)
    55-59210 (33.3)209 (37.0)1.28 (0.81-2.02)
    60-64251 (39.8)191 (33.8)1.68 (1.06-2.64)
Race
    Caucasian597 (94.8)549 (97.2)1.00 (reference)
    African American33 (5.2)16 (2.8)1.88 (1.02-3.46)
Family history of prostate cancer
    No509 (80.8)506 (89.6)1.00 (reference)
    Yes121 (19.2)59 (10.4)2.04 (1.46-2.86)
Number of PSA tests
    None173 (27.5)375 (66.4)1.00 (reference)
    1-2219 (34.8)112 (19.8)4.21 (3.14-5.64)
    3-4128 (20.3)47 (8.3)5.86 (4.00-8.58)
    ≥5110 (17.5)31 (5.5)7.61 (4.89-11.83)
Total vitamin D (μg/d)
    ≤4.7121 (19.2)122 (21.6)1.00 (reference)
    4.8-8.8125 (19.8)119 (21.1)1.05 (0.74-1.50)
    8.9-72.0130 (20.6)118 (20.9)1.10 (0.77-1.58)
    >72.0151 (24.0)123 (21.8)1.21 (0.85-1.71)
Stage of disease at diagnosis
    Local457 (72.5)
    Regional145 (23.0)
    Distant20 (3.2)
    Unknown8 (1.3)
Gleason score
    Low (2-4)66 (10.5)
    Moderate [5-7 (3 + 4)]479 (76.0)
    High [7 (4 + 3), 8-10]82 (13.0)
    Missing3 (0.5)
Cancer aggressiveness
    Less aggressive§409 (64.9)
    More aggressive221 (35.1)
  • * Adjusted for age.

  • PSA tests done in the previous 5 y before reference date.

  • Total daily intake from diet and supplements; missing information for 83 controls and 103 cases.

  • § Local stage, Gleason score 2-6 or 7 (3 + 4), and diagnostic serum PSA <20 ng/mL.

  • Regional/distant stage, Gleason score 7 (4 + 3) or 8-10, or serum PSA ≥20 ng/mL.