Table 1.

Characteristics of male participants from the AHS cohort and nested case–control study

Nested case–controlAHS cohort
Prostate casesControlsProstate casesNon-cases
CharacteristicN (%)N (%)N (%)N (%)
Participants7761,4441,27548,286
Age at enrollment, y
 <503 (0.4)5 (0.4)9 (0.7)17,801 (36.9)
 50–5974 (9.5)144 (10.0)111 (8.7)13,592 (28.2)
 60–69259 (33.4)491 (34.0)409 (32.1)9,515 (19.7)
 70–79355 (45.8)634 (43.9)573 (44.9)5,657 (11.7)
 ≥8085 (11.0)170 (11.8)173 (13.6)1,721 (3.6)
State of residence
 Iowa520 (67.0)991 (68.6)789 (61.9)32,740 (67.8)
 North Carolina256 (33.0)453 (31.4)486 (38.1)15,546 (32.2)
Applicator type
 Private741 (95.5)1,363 (94.4)1,219 (95.6)43,895 (90.9)
 Commercial35 (4.5)81 (5.6)56 (4.4)4,391 (9.1)
Family history of prostate cancera
 No575 (74.1)1,193 (82.6)924 (72.5)41,365 (85.7)
 Yes130 (16.8)145 (10.0)212 (16.6)3,748 (7.8)
Prostate cancer stage
 Local579 (74.3)945 (74.1)
 Regional156 (20.1)247 (19.4)
 Distant12 (1.5)33 (2.6)
 Not staged29 (3.7)50 (3.9)
Prostate cancer grade
 Well differentiated38 (4.9)60 (4.7)
 Moderately differentiated547 (70.5)855 (67.1)
 Poorly differentiated168 (21.6)302 (23.7)
 Undifferentiated4 (0.5)6 (0.5)
 Not graded19 (2.4)52 (4.1)
  • aFamily history of prostate cancer in first-degree relative.