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Am Fam Physician. 2012 May 15;85(10):950.


The article, “Treatment and Prevention of Kidney Stones: An Update” (December 1, 2011, page 1234), and the accompanying patient education handout, “Preventing Kidney Stones with Diet and Nutrition” (December 1, 2011, page 1243), contained multiple errors. In the first full paragraph of the right-hand column on page 1236, the second sentence listed “black race” as a traditional risk factor for chronic kidney disease. The sentence should have read: “Persons with kidney stones are more likely to have traditional risk factors for chronic kidney disease (e.g., hypertension, preexisting kidney disease, diabetes, proteinuria, albuminuria).” The first line of Table 4 (page 1237) under the “Type of medication” column should have listed “Agents that decrease uric acid production” rather than “Agents with uricosuric properties.” Two of the section headers on page 1241 contained incorrect words: “How can urine be alkalinized (decrease urine pH)?” should have read “How can urine be alkalinized (higher urine pH)?” and “How can urine be acidified (increase urine pH)?” should have read “How can urine be acidified (lower urine pH)?” In the patient education handout, the section on “Uric Acid Stones” at the bottom of the right-hand column on page 1243 was misleading regarding the formation of uric acid stones and the effect of citrus juice on urine. The paragraph should have read: “Uric acid stones form in acidic urine and account for approximately 17 percent of kidney stones. Alkalinizing the urine with citrus juice, decreasing protein intake, avoiding beer and alcohol, and reducing fructose intake are all opportunities for prevention. Do not drink cranberry juice or take betine—both of these will acidify the urine.” The online versions of this article and patient education handout have been corrected.

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