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  • Title: Risk factors for anaemia in patients on prolonged linezolid therapy for chronic osteomyelitis: a case-control study.
    Author: Senneville E, Legout L, Valette M, Yazdanpanah Y, Giraud F, Beltrand E, Obert G, Dubreuil L, Migaud H, Mouton Y.
    Journal: J Antimicrob Chemother; 2004 Oct; 54(4):798-802. PubMed ID: 15329363.
    Abstract:
    OBJECTIVES: The intrinsic properties of the new antibiotic linezolid make it an attractive candidate for the treatment of chronic osteomyelitis. However, data regarding the tolerance of long-term linezolid administration are still lacking. METHODS: The medical charts of patients given linezolid for >4 weeks were retrospectively analysed, especially their haematology. In a case-control study, we compared the respective characteristics of patients who developed anaemia during linezolid therapy and those who did not. RESULTS: Forty-five adults with chronic osteomyelitis received 600 mg linezolid intravenously twice daily for 7 days, and then orally, for a mean total duration of 15.9 weeks (range, 6-36). Anaemia episodes requiring blood transfusion occurred in 13/45 patients (28.9%). Median time from treatment initiation to anaemia onset was 7.4 weeks (range, 4-16). Anaemia was significantly associated with premature linezolid therapy cessation (P = 0.0012). No linezolid-related thrombocytopenia was observed. By univariate analysis, four variables were associated with the occurrence of anaemia: age >58 years, alcohol abuse, diabetes mellitus and low haemoglobin before linezolid treatment. Logistic regression analysis revealed two independent risk factors for anaemia: age >58 years (OR = 20.5, 95% CI 0.69-599; P = 0.0001) and pre-treatment haemoglobin <10.5 g/dL (OR = 16.49, 95% CI 1.06-255; P = 0.04). CONCLUSIONS: Profound anaemia may occur in adult patients with chronic osteomyelitis on prolonged linezolid therapy, and often necessitates linezolid cessation. These patients are likely to be aged >58 years and to have low pre-treatment haemoglobin. The results for the present series might help physicians to identify patients who should not be given long-term linezolid treatment for chronic osteomyelitis.
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