Association of osteonecrosis and osteoporosis in HIV-1-infected patients

Background: We questioned whether heightened impairment of regenerative capacity of osteoblasts might account for the excess of osteonecrosis and osteoporosis seen in HIV-infected patients. Were that the case, patients with osteonecrosis would have more osteoporosis than the patients without osteonecrosis. Methods: Eleven thousand, five hundred and six patients with HIV infection were studied for the presence of osteonecrosis and osteoporosis and for confounding factors. Results: Depending upon whether dual-energy X-ray absorptiometry (DEXA) was before or after the diagnosis of osteonecrosis, osteoporosis was between 6.3 and 18 times more frequent in those with than in those without osteonecrosis. Those who received DEXA were similar to those who did not in median CD4 level at the time of DEXA or at a comparable time after their first recorded CD4 cell count in our system; in nadir CD4 level; and in use and amount of corticosteroids. Those with osteonecrosis and osteoporosis did not use more corticosteroids than those with osteoporosis without osteonecrosis. Alcohol abuse had not been diagnosed more often before the occurrence of osteonecrosis than in those without osteonecrosis. Tenofovir was not more used by those with than by those without osteoporosis. Conclusion: Osteonecrosis and osteoporosis in HIV-infected patients were concurrent more often than expected. (C) 2011 Wolters Kluwer Health vertical bar Lippincott Williams & Wilkins