Twenty-three percent of colonoscopies performed in patients age 70 and older may be inappropriate, according to a study of Texas patients reported in JAMA Internal Medicine, and among those 76 to 85, up to 39% were considered inappropriate. Researchers also found more than 40% of tests performed by some physicians involved patients who likely did not need the screening. "There's very limited data for any cancer test that it leads to any benefit for older adults," said Dr. Mara Schonberg.

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