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Comparative effects of treatment with etidronate and alendronate on bone resorption, back pain, and activities of daily living in elderly women with vertebral fractures.

Author(s): Iwamoto J, Takeda T, Ichimura S, Uzawa M

Affiliation(s): Department of Sports Medicine, Keio University School of Medicine, Tokyo, Japan. jiwamoto@sc.itc.keio.ac.jp

Publication date & source: 2003-12, Keio J Med., 52(4):230-5.

Publication type: Clinical Trial; Randomized Controlled Trial

The purpose of the present study was to compare the effects of treatment with etidronate and alendronate on bone resorption, back pain, and activities of daily living (ADL) in elderly women with vertebral fractures. Fifty elderly women, 63-84 years of age, with back pain due to osteoporotic vertebral fractures were randomly divided into two groups with 25 patients in each group: the cyclical etidronate treatment group (200 mg/day for 2 weeks per 3 months) and the alendronate treatment group (5 mg/day). The level of urinary cross-linked N-terminal telopeptides of type I collagen (NTx) measured by an enzyme-linked immunosorbent assay, back pain evaluated with the face scale score, and the ADL score (disability) determined with a questionnaire were assessed before and 3 and 6 months after the start of treatment. No significant differences in these parameters were found between the two groups before the treatment. The urinary NTx level, the face scale score, and the ADL score decreased significantly in both groups. Although the reduction in the urinary NTx level was significantly greater in the alendronate group than in the etidronate group, the reduction in the face scale score was transiently significantly greater in the etidronate group than in the alendronate group. However, changes in the ADL score did not significantly differ between the two groups. The present study showed that although back pain was reduced and ADL was improved in both treatment groups of elderly women with vertebral fractures, the mechanism for the reduction in back pain differs to some extent between the two treatment groups. A double-blind placebo-controlled study is needed to confirm the therapeutic effects of these agents on back pain and deterioration of ADL.

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