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Table 1 Baseline characteristics of 6017 male participants of the Collaborative cohort study at screening and prostate cancer outcome

From: Coffee consumption and prostate cancer risk: further evidence for inverse relationship

  Categories of cups of coffee/day
  0 1--2 ≥ 3
Sample Size 2,628   2,059   1,330  
Person-years of follow up 65,051   54,603   35,728  
Number of Deaths%(n) 70.3 (1848) 64.0 (1317) 62.0 (825)
Number of men with prostate cancers%(n) 5.3 (139) 5.5 (114) 4.9 (65)
Gleason grade ≥8 48.2 (39) 29.9 (20) 28.9 (11)
Gleason grade =7 14.7 (12) 20.9 (14) 31.6 (12)
Gleason grade <7 21.0 (17) 25.4 (17) 18.4 (7)
Unknown 16.1 (13) 23.8 (16) 21.1 (8)
Mean Age (s.d.) 48.2 (7.3) 47.5 (7.2) 46.8 (7.3)
Mean Height (s.d.) 171.7 (6.9) 173.7 (7.1) 174.4 (6.8)
Mean Weight (s.d.) 74.3 (10.7) 75.9 (10.7) 76.2 (10.2)
Mean BMI (s.d.) 25.2 (3.2) 25.1 (3.0) 25.0 (2.9)
BMI (kg m -2 ),%(n)
<25 (Under & Desirable) 48.7 (1281) 49.3 (1015) 50.5 (671)
25 – <30 (Overweight) 44.3 (1163) 45.3 (932) 44.8 (596)
≥30 (Obese) 7.0 (184) 5.4 (112) 4.7 (63)
Alcohol intake (units/week),%(n)
0 24.2 (873) 29.7 (623) 36.4 (396)
1—10 30.7 (606) 31.6 (683) 26.4 (451)
11—21 22.0 (545) 19.8 (409) 20.2 (259)
> 21 23.2 (604) 18.9 (344) 17.1 (224)
Smoking,%(n)       
Never smoker 18.4 (483) 19.4 (400) 15.9 (211)
Smoker 60.5 (1590) 53.0 (1091) 61.1 (812)
Ex-smoker 21.1 (555) 27.6 (568) 23.1 (307)
Social Class,%(n)
I&II 18.3 (480) 41.0 (847) 51.1 (680)
IIIN 29.0 (763) 15.1 (310) 11.0 (147)
IIIM 17.9 (470) 20.4 (417) 17.1 (227)
IV&V 34.8 (915) 23.5 (485) 20.8 (276)