Table 1.

Baseline characteristics of PCPT participants

n (%)n (%)PGeometric meana (95% CI)
Total sample1,6951,682
Age, yNRb
 55–59452 (27)453 (27)53.7 (23.8–121.2)
 60–64548 (32)538 (32)57.6 (26.8–123.5)
 65–69409 (24)416 (25)57.5 (27.6–119.8)
 70+286 (17)275 (16)57.0 (26.6–122.2)
RaceNRb
 White1,571 (93)1,333 (79)58.8 (28.6–120.9)
 African American82 (5)171 (10)39.5 (15.7–99.7)
 Other42 (2)178 (11)49.1 (22.9–105.6)
Family history of prostate cancerNRb
 No1,329 (78)1,320 (78)56.3 (25.8–122.7)
 Yes366 (22)362 (22)56.7 (26.9–119.7)
PCPT treatment armNRb
 Finasteride708 (42)711 (42)55.3 (24.8–123.6)
 Placebo987 (58)971 (58)57.2 (27.1–120.8)
Baseline diabetes<0.001
 No1,618 (95)1,556 (93)57.0 (26.5–12.03)
 Yes77 (5)125 (7)47.8 (22.8–99.9)
BMI, kg/m20.20
 Normal (<25)466 (28)417 (25)60.9 (28.5–130.2)
 Overweight (25–<30)862 (51)880 (53)57.2 (27.0–121.2)
 Obese (≥30)351 (21)368 (22)49.2 (22.7–106.6)
Waist to hip0.99
 0.77–<0.94500 (33)519 (34)58.7 (27.1–127.2)
 0.94–<0.98500 (33)519 (34)56.4 (26.5–119.8)
 0.98–1.18501 (34)515 (32)53.8 (24.9–116.6)
Latitude of study site,c degrees0.02
 21.3–<33.47398 (23)443 (26)59.8 (28.5–125.5)
 33.47–<38.49425 (25)429 (26)56.5 (26.3–121.1
 38.49–<41.69412 (24)429 (26)55.5 (24.9–124.0)
 41.69–48.73460 (27)381 (23)54.0 (25.1–116.2)
Smoking status0.59
 Never601 (35)573 (34)57.2 (27–121.2)
 Current115 (7)125 (7)48.9 (20.3–117.6)
 Former979 (58)984 (59)56.9 (26.5–122.2)
Alcohol intake, g/d0.84
 Non-drinker381 (22)392 (23)55.3 (25.7–119.3)
 >0–<301,161 (69)1,142 (68)56.6 (26.3–121.9)
 ≥30153 (9)148 (9)57.9 (25.7–130.6)
Physical activityd0.24
 Sedentary286 (17)291 (17)50.1 (22.3–112.6)
 Light703 (42)699 (42)55.7 (25.8–120.3)
 Moderate554 (33)511 (31)59.2 (28.6–122.5)
 Active145 (8)173 (10)63.3 (30.4–131.8)
Calcium intake,e mg/d0.28
 156–<697364 (25)377 (25)50.9 (21.6–120.0)
 697–<980360 (25)381 (25)56.9 (27.3–118.6)
 980–<1,364351 (24)390 (26)56.7 (27.6–116.5)
 1,364–4,075387 (26)354 (24)62.0 (30.7–125.0)
Vitamin D intake,e μg/d0.30
 0.64–<4.31358 (25)383 (26)51.8 (22.0–121.7)
 4.31–<8.37348 (24)393 (26)55.1 (25.6–118.7)
 8.37–<14.64379 (26)362 (24)57.7 (28.3–117.8)
 14.64–42.27377 (26)364 (24)61.8 (31.2–122.4)

Abbreviation: NR, not reported.

  • aUnadjusted.

  • bP values from matching or oversampling variables are not interpretable.

  • cLatitude defined as degrees north from Equator; 1° change in latitude is approximately equivalent to 69 miles; a latitude of 33°N is approximately equivalent to Long Beach, CA or Atlanta, GA; a latitude of 39°N is approximately equivalent to Sacramento, CA or Washington, DC and 42°N forms the California–Oregon and the New York–Pennsylvania borders.

  • dSedentary: low activity index (calculated as the multiple of frequency, duration, and pace indices) and participated in intense activities less than once a week; Light: low activity index and participated in intense activities 4 times a week or less; Moderate: moderate or high activity index and participated in intense activities 4 times a week; Active: high activity index and participated in intense activities 5 or more times a week.

  • eFrom diet and supplements; for vitamin D, 1 μg = 40 IU.