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. Author manuscript; available in PMC: 2014 Mar 1.
Published in final edited form as: Genes Immun. 2013 May 9;14(6):347–355. doi: 10.1038/gene.2013.22

Table 1.

Study population characteristics among men of African descent from the U.S. and Jamaica.

Characteristics Cases Controls p value

Number of Participants, n 279 535 ---

Age at enrollment (yrs), Median (range) 67 (45–91) 53 (27–89) <0.0001a

Family History of Prostate Cancer, n (%)
 Yes 35 (16.1) 21 (12.5)
 No 182 (83.9) 147 (87.5) 0.316b
 Missing 62 (22.2) 367 (68.6)

PSA (ng/ml), median (range) 11.7 (0.01–10,000) 0.9 (0.0–4.0) <0.0001a

PSA (ng/ml)b, n (%)
 < 4 37 (13.8) 517 (99.8) <0.0001b
 ≥ 4 231 (86.2) 1 (0.2)
 Missing 11 (0.04) 17 (0.03)

Gleason Score, n (%)
 4 12 (5.6)
 5 14 (6.5)
 6 74 (34.2)
 7 70 (32.4)
 8 18 (8.3)
 9 22(10.2)
 10 6 (2.8)
 Missing 63 (22.6)

Global WAA, median (range) 0.79 (0.25–0.94) 0.767 (0.25–0.95) 0.107a

Abbreviations: PSA, prostate specific antigen; WAA, West African Ancestry;

a

Wilcoxon Sum Rank Test was used to examine whether differences exists within median age (yrs),

b

Chi-square test of heterogeneity was used to determine whether the prevalence of family history or high PSA levels (PSA 4 ng/mL) vary between cases and controls, PSA (ng/ml) and Global WAA between cases and controls.