A Drug’s Lack of Randomized Clinical Trials Does Not Imply the Drug Lacks Efficacy

(p. D5) In 2013, the American College of Cardiology and the American Heart Association issued a series of statin recommendations for primary prevention, relevant to adults up to age 75 who have high cholesterol or diabetes, or who for other reasons face an estimated 7.5 percent risk or greater of developing heart disease within 10 years.

Last year, the United States Preventive Services Task Force similarly recommended statins for primary prevention in people aged 40 to 75 who had risk factors like high cholesterol, diabetes, high blood pressure or smoking, with a 10-year disease risk of 10 percent or greater.

But for people over age 75, both panels agreed, there was not sufficient evidence to reach a conclusion. As with many clinical trials, the major statin studies mostly haven’t included patients at advanced ages.

. . .

But Dr. Paul Ridker, a self-described “statin advocate” who directs the Center for Cardiovascular Disease Prevention at Brigham and Women’s Hospital in Boston, gets irked at the argument that we don’t know enough to give statins to older patients without heart disease.

“I don’t believe there’s any doubt that statin therapy is effective for primary prevention in older adults,” Dr. Ridker said. He cites a recent reanalysis of data from two major studies showing that patients over age 70 taking statins experienced the same reductions in cardiovascular events and mortality as younger ones.

Dr. Orkaby and her Harvard colleagues hoped to help resolve such questions with their recent study, published in the Journal of the American Geriatrics Society, comparing physicians over age 70 who took statins for primary prevention with those who didn’t.

The team matched each group for 30 variables and found that over an average of seven years, statin-takers had an 18 percent lower death rate, though not a statistically significant reduction in cardiovascular events.

In the same issue, though, an editorial co-authored by Dr. Rich called statin use for primary prevention in older patients “an unresolved conundrum.”

The physician study was observational, so can’t establish causes, he pointed out.

For the full story see:

Paula Span. “The New Old Age; If You’re Over 75 and Healthy, Are Statins for You?” The New York Times (Tuesday, January 9, 2018 [sic]): D5.

(Note: ellipsis added.)

(Note: the online version of the story has the date January 5, 2018 [sic], and has the title “The New Old Age; You’re Over 75, and You’re Healthy. Why Are You Taking a Statin?”)

The article on the effect of statins on older physicians, co-authored by Orkaby and mentioned above, is:

Orkaby, Ariela R., J. Michael Gaziano, Luc Djousse, and Jane A. Driver. “Statins for Primary Prevention of Cardiovascular Events and Mortality in Older Men.” Journal of the American Geriatrics Society 65, no. 11 (Nov. 2017): 2362-68.

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