Table 1.

Characteristics of prostate cancer cases and controls

Cases (n = 272)Controls (n = 426)
n (%)
Age at baseline (y)
    <5539 (14)64 (15)
    55-5969 (25)113 (27)
    60-6474 (27)111 (26)
    ≥6590 (33)138 (32)
Ethnicity*
    White253 (93)403 (95)
    Non-white19 (7)23 (5)
Education
    <12 y41 (21)56 (18)
    High school graduate57 (29)104 (33)
    Some college55 (28)95 (30)
    4-y degree or higher45 (23)60 (19)
BMI at blood draw
    Normal, <2557 (21)94 (22)
    Overweight, 25-29125 (46)220 (52)
    Obese, ≥3090 (33)112 (26)
Alcohol consumption (drinks/d)
    None84 (31)152 (36)
    <1109 (40)157 (37)
    1-254 (20)68 (16)
    ≥325 (9)49 (11)
Smoking status at baseline
    Never/former137 (50)206 (48)
    Current135 (50)220 (52)
Smoking pack-years§
    <4093 (35)145 (35)
    40-60115 (43)167 (40)
    >6057 (22)102 (25)
Exposure population
    Asbestos exposed124 (45)190 (45)
    Heavy smoker exposed148 (55)236 (55)
Gleason score
    Unknown63 (33)NA
    <7128 (47)NA
    ≥781 (30)NA
(SD)
Time from blood draw to cancer diagnosis (mo)56 (16)NA
Mean (SE) weight % of total fatty acids
Monounsaturated, trans C16
    Δ9t 16:10.19 (0.004)0.20 (0.003)
    Δ7t 16:10.07 (0.002)0.07 (0.001)
Monounsaturated, trans C18
    Δ8t 18:10.19 (0.005)0.19 (0.004)
    Δ9t 18:1 (elaidic)0.28 (0.007)0.28 (0.006)
    Δ10t 18:10.25 (0.007)0.25 (0.005)
    Δ11t 18:1 (trans-vaccenic)0.43 (0.011)0.41 (0.008)
    Δ12t 18:10.52 (0.013)0.51 (0.010)
Diunsaturated, trans C18:2
    Δ9c,12t 18:20.08 (0.002)0.06 (0.002)
    Δ9t,12c 18:2**0.14 (0.004)0.13 (0.003)
    Δ9t,12t 18:20.11 (0.002)0.10 (0.002)
  • * Matching variable for second selection only.

  • Missing data (case n = 74; control n = 111).

  • Matching variable for first selection only.

  • § Missing data (case n = 7; control n = 12).

  • Geometric mean (geometric SE).

  • T test, P < 0.0001.

  • ** T test, P < 0.05.