Table 1.

Baseline characteristics overall and stratified by weekly alcohol consumption at ages 15 to 19

Average alcohol consumption at age 15–19
Overall (N = 650)0 drinks/week (N = 317)1–6 drinks/week (N = 279)≥7 drinks/week (N = 54)P
Age at biopsy, median (IQR)64 (60, 68)64 (61, 68)64 (59, 68)63 (61, 67)0.109a
Race0.332b
 Non-white346 (53%)175 (55%)147 (53%)24 (44%)
 White304 (47%)142 (45%)132 (47%)30 (56%)
Year of consent, median (IQR)2011 (08, 15)2011 (09, 15)2011 (08, 15)2011 (08, 15)0.925a
Digital rectal exam0.290b
 Not suspicious for cancer491 (76%)248 (78%)203 (73%)40 (74%)
 Suspicious for cancer159 (24%)69 (22%)76 (27%)14 (26%)
TRUS prostate volume (cc) Median (IQR)42.0 (30.0, 58.2)44.0 (31.0, 61.2)40.0 (28.0, 58.1)40.0 (28.7, 52.0)0.182a
PSA at biopsy (ng/mL), median (IQR)5.7 (4.5, 7.9)5.9 (4.6, 7.8)5.5 (4.4, 8.1)5.8 (4.6, 8.0)0.573a
BMI (kg/m2), median (IQR)29.2 (26.5, 32.7)29.4 (26.5, 32.8)28.8 (26.3, 32.4)30.2 (27.3, 34.6)0.267a
Previous prostate biopsy102 (16%)58 (18%)36 (13%)8 (15%)0.192b
Smoking pack years, median (IQR)16.1 (0.9, 37.1)5.5 (0, 30.4)21.0 (6.6, 41.6)34.5 (14.4, 59.9)<0.001a
Alcohol consumption, age 20–29<0.001b
 0 drinks/week120 (18%)112 (35%)7 (3%)1 (2%)
 1–6 drinks/week365 (56%)167 (53%)194 (70%)4 (7%)
 ≥7 drinks/week165 (25%)38 (12%)78 (28%)49 (91%)
Alcohol consumption, age 30–39<0.001b
 0 drinks/week146 (22%)114 (36%)27 (10%)5 (9%)
 1–6 drinks/week336 (52%)161 (51%)164 (59%)11 (20%)
 ≥7 drinks/week168 (26%)42 (13%)88 (32%)38 (70%)
Alcohol consumption, age 40–49<0.001b
 0 drinks/week200 (31%)135 (43%)54 (19%)11 (21%)
 1–6 drinks/week302 (47%)139 (44%)150 (54%)13 (25%)
 ≥7 drinks/week144 (22%)41 (13%)74 (27%)29 (55%)
Current alcohol consumption<0.001b
 0 drinks/week322 (50%)191 (60%)106 (38%)25 (46%)
 1–6 drinks/week260 (40%)100 (32%)141 (51%)19 (35%)
 ≥7 drinks/week68 (10%)26 (8%)32 (11%)10 (19%)
Cumulative lifetime alcohol consumption<0.001b
 Tertile 1 (<3,094 drinks)226 (35%)164 (52%)58 (21%)4 (7%)
 Tertile 2 (3,094–10,659 drinks)209 (32%)97 (31%)109 (39%)3 (6%)
 Tertile 3 (≥10,660 drinks)215 (33%)56 (18%)112 (40%)47 (87%)
  • aKruskal–Wallis.

  • bThe χ2 test.