We're unable to sign you in at this time. Please try again in a few minutes.
We were able to sign you in, but your subscription(s) could not be found. Please try again in a few minutes.
There may be a problem with your account. Please contact the AMA Service Center to resolve this issue.
Contact the AMA Service Center:
Telephone: 1 (800) 262-2350 or 1 (312) 670-7827  *   Email: subscriptions@jamanetwork.com
Error Message ......
Article |

Disease-Specific Survival Following Routine Prostate Cancer Screening by Digital Rectal Examination: Corrected Patient Classification

Glenn S. Gerber, MD; Ronald Thisted, PhD; Gerald W. Chodak, MD; Ian M. Thompson, MD
JAMA. 1993;270(20):2437. doi:10.1001/jama.1993.03510200043029.
Text Size: A A A
Published online


To the Editor.  —It has been brought to our attention that there are discrepancies between our recently published article in JAMA1 and the two original publications2,3 on prostate cancer screening on which the recent article was based. Specifically, the relative number of men diagnosed with prostate cancer in the first year of screening (group 1) and subsequent years of screening (group 2) was not the same between the individual studies. This discrepancy is due in part to the addition of some patients to the study group after the publication of the original articles. However, our review of the data has also revealed that three patients were misclassified in group 2 when they were truly diagnosed in the first year of screening. In addition, the correct classification of two other patients is unclear, despite review of all available information.To assess the impact of these errors on the conclusions


Sign in

Purchase Options

• Buy this article
• Subscribe to the journal
• Rent this article ?




Also Meets CME requirements for:
Browse CME for all U.S. States
Accreditation Information
The American Medical Association is accredited by the Accreditation Council for Continuing Medical Education to provide continuing medical education for physicians. The AMA designates this journal-based CME activity for a maximum of 1 AMA PRA Category 1 CreditTM per course. Physicians should claim only the credit commensurate with the extent of their participation in the activity. Physicians who complete the CME course and score at least 80% correct on the quiz are eligible for AMA PRA Category 1 CreditTM.
Note: You must get at least of the answers correct to pass this quiz.
Please click the checkbox indicating that you have read the full article in order to submit your answers.
Your answers have been saved for later.
You have not filled in all the answers to complete this quiz
The following questions were not answered:
Sorry, you have unsuccessfully completed this CME quiz with a score of
The following questions were not answered correctly:
Commitment to Change (optional):
Indicate what change(s) you will implement in your practice, if any, based on this CME course.
Your quiz results:
The filled radio buttons indicate your responses. The preferred responses are highlighted
For CME Course: A Proposed Model for Initial Assessment and Management of Acute Heart Failure Syndromes
Indicate what changes(s) you will implement in your practice, if any, based on this CME course.


Some tools below are only available to our subscribers or users with an online account.

0 Citations

Sign in

Purchase Options

• Buy this article
• Subscribe to the journal
• Rent this article ?

Related Content

Customize your page view by dragging & repositioning the boxes below.