Study Population	Sample Size	Proportion of Study Population That Accurately Reported Their Risk	Other Findings
Unaffected men with a family history of prostate cancer [3]	120 men aged 40 to 72 years	40%
First-degree male relatives (FDR of men with prostate cancer [4]	105 men aged 40 to 70 years	62%
Men with brothers affected with prostate cancer [5]	111 men aged 33 to 78 years	Not available	38% of men reported their risk of prostate cancer to be the same or less than the average man.
FDR of men with prostate cancer and a community sample [6]	56 men with a FDR with prostate cancer and 100 men without a FDR with prostate cancer all older than 40 years	57%	29% of men with a FDR thought that they were at the same risk as the average man, and 14% believed that they were at somewhat lower risk than average.

References

3. Bratt O, Damber JE, Emanuelsson M, et al.: Risk perception, screening practice and interest in genetic testing among unaffected men in families with hereditary prostate cancer. Eur J Cancer 36 (2): 235-41, 2000.  [PUBMED Abstract]
   
   
4. Cormier L, Kwan L, Reid K, et al.: Knowledge and beliefs among brothers and sons of men with prostate cancer. Urology 59 (6): 895-900, 2002.  [PUBMED Abstract]
   
   
5. Beebe-Dimmer JL, Wood DP Jr, Gruber SB, et al.: Risk perception and concern among brothers of men with prostate carcinoma. Cancer 100 (7): 1537-44, 2004.  [PUBMED Abstract]
   
   
6. Miller SM, Diefenbach MA, Kruus LK, et al.: Psychological and screening profiles of first-degree relatives of prostate cancer patients. J Behav Med 24 (3): 247-58, 2001.  [PUBMED Abstract]