Abstract | OBJECTIVES: To review published, randomized trials examining the effect of androgen treatment on muscle strength in older men. DESIGN: Systematic review using meta-analysis procedures. SETTING: Computerized and manual searches. PARTICIPANTS: MEDLINE, EMBASE, CINAHL, and the Cochrane Register were searched for trials. Key words included testosterone, androgen, sarcopenia, muscle loss, aged, aging, elderly, older, geriatric, randomized controlled trials, and controlled clinical trials. Sixty-five nonoverlapping studies were found. Meta-analysis methods were used to evaluate the 11 randomized, double-blind trials. INTERVENTION: MEASUREMENTS: Tests of muscle strength. RESULTS: The studies included 38 statistical comparisons. The mean g-index (g(i)) adjusted for sample size was 0.53 (95% confidence interval (CI) = 0.21-0.86). Subanalyses revealed larger effects for measures of lower extremity muscle strength (g(i) = 0.63, 95% CI = 0.03-1.28) than for upper extremity muscle strength (g(i) = 0.47, 95% CI = 0.12-0.84). A larger mean g-index was found for injected (g(i) = 0.95, 95% CI = 0.33-1.58) than topical (g(i) = 0.26, 95% CI = 0.08-0.42) or oral (g(i) = -0.21, 95% CI = -1.40-1.02) administration of testosterone/DHT. Effect sizes were related to study characteristics such as subject attrition and design-quality ratings. Sensitivity analyses revealed that the elimination of one study reduced the mean g-index from 0.53 to 0.23. CONCLUSION: The results suggest that testosterone/DHT therapy produced a moderate increase in muscle strength in men participating in 11 randomized trials. One study influenced the mean effect size.
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Authors | Kenneth J Ottenbacher, Margaret E Ottenbacher, Allison J Ottenbacher, Ana Alfaro Acha, Glenn V Ostir |
Journal | Journal of the American Geriatrics Society
(J Am Geriatr Soc)
Vol. 54
Issue 11
Pg. 1666-73
(Nov 2006)
ISSN: 0002-8614 [Print] United States |
PMID | 17087692
(Publication Type: Journal Article, Meta-Analysis, Research Support, N.I.H., Extramural, Systematic Review)
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Chemical References |
- Dihydrotestosterone
- Testosterone
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Topics |
- Aged
- Dihydrotestosterone
(therapeutic use)
- Hormone Replacement Therapy
- Humans
- Male
- Muscle Strength
(drug effects)
- Randomized Controlled Trials as Topic
- Testosterone
(therapeutic use)
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