The New England Journal of Medicine Downloaded from nejm.org at UC SHARED JOURNAL COLLECTION on January 23, 2015. For personal use only. No other uses without permission. Copyright © 1992 Massachusetts Medical Society. All rights reserved.

The New England Journal of Medicine Downloaded from nejm.org at UC SHARED JOURNAL COLLECTION on January 23, 2015. For personal use only. No other uses without permission. Copyright © 1992 Massachusetts Medical Society. All rights reserved.

The New England Journal of Medicine Downloaded from nejm.org at UC SHARED JOURNAL COLLECTION on January 23, 2015. For personal use only. No other uses without permission. Copyright © 1992 Massachusetts Medical Society. All rights reserved.

The New England Journal of Medicine Downloaded from nejm.org at UC SHARED JOURNAL COLLECTION on January 23, 2015. For personal use only. No other uses without permission. Copyright © 1992 Massachusetts Medical Society. All rights reserved.

The New England Journal of Medicine Downloaded from nejm.org at UC SHARED JOURNAL COLLECTION on January 23, 2015. For personal use only. No other uses without permission. Copyright © 1992 Massachusetts Medical Society. All rights reserved.

A case-control study of screening sigmoidoscopy and mortality from colorectal cancer.

The efficacy of sigmoidoscopic screening in reducing mortality from colorectal cancer remains uncertain. A randomized trial would be ideal for clarify...
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