Hormone Therapy

Effect of testosterone replacement therapy on fracture risk in hypogonadal men: A systematic review and meta-analysis of randomized controlled trials.

TL;DR

TRT is associated with an increased incidence of predominantly non-major fractures, while the risk of major osteoporotic fractures, including hip and vertebral fractures, was not increased.

Key Findings

Testosterone replacement therapy was associated with increased risk of clinical fractures compared with placebo.

  • RR 1.55, 95% CI 1.21–1.97, p < 0.0001
  • Heterogeneity was absent (I2 0%), suggesting consistency across included studies
  • Analysis was based on two RCTs with a combined sample of n = 2711
  • The increased risk was driven predominantly by non-major fractures

No significant difference between TRT and placebo was observed for major osteoporotic fractures (hip, spine, wrist, and arm).

  • RR 0.62, 95% CI 0.12–3.35, p = 0.58
  • Heterogeneity was substantial for this outcome (I2 63%)
  • Major osteoporotic fractures were defined as hip, spine, wrist, and arm fractures
  • The wide confidence interval reflects limited statistical precision for this subgroup

TRT was not associated with a significantly different risk of vertebral fractures compared with placebo.

  • RR 0.87, 95% CI 0.29–2.58, p = 0.80
  • Low heterogeneity for this outcome (I2 9%)
  • Analyzed separately from the broader major osteoporotic fracture category

TRT was not associated with a significantly different risk of hip fractures compared with placebo.

  • RR 1.02, 95% CI 0.33–3.09, p = 0.98
  • No heterogeneity detected (I2 0%)
  • Analyzed as a separate outcome from the major osteoporotic fracture composite

Only two RCTs met inclusion criteria for the meta-analysis, representing a limited evidence base.

  • Initial search yielded 1145 results after removal of duplicates
  • Seven papers underwent full-text assessment
  • Only two studies were included in both qualitative and quantitative analysis
  • Combined sample size across included studies was n = 2711
  • Literature search covered PubMed, Scopus, and Cochrane databases from inception through 30 September 2025

What This Means

This research systematically reviewed and pooled data from randomized controlled trials to examine whether testosterone replacement therapy (TRT) affects fracture risk in men with hypogonadism (abnormally low testosterone). Despite TRT's well-known benefits for bone density, whether it actually reduces fractures in this population had remained unclear. The researchers identified only two high-quality trials involving a combined total of 2,711 men that met their strict inclusion criteria. The analysis found that men receiving TRT had a higher overall rate of clinical fractures compared to those receiving placebo — about 55% higher relative risk. However, when looking specifically at the most serious fracture types (major osteoporotic fractures such as hip, spine, wrist, and arm fractures), there was no statistically significant difference between TRT and placebo groups. Similarly, hip fractures and vertebral (spine) fractures analyzed individually showed no significant difference between groups. This suggests the elevated overall fracture risk associated with TRT in this analysis was driven largely by less severe, non-major fractures. This research suggests that while TRT may be linked to more minor fractures — possibly because increased physical activity or other behavioral changes accompany treatment — it does not appear to increase the risk of the most clinically serious fractures. However, the findings are based on only two studies, and the evidence base remains very limited. The wide confidence intervals and variable heterogeneity across outcomes highlight the need for larger, long-term randomized trials before firm conclusions can be drawn about TRT's effect on fracture risk in hypogonadal men.

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Citation

Anagnostis P, Divaris E, Zidrou M, Kassi E, Tournis S. (2026). Effect of testosterone replacement therapy on fracture risk in hypogonadal men: A systematic review and meta-analysis of randomized controlled trials.. Maturitas. https://doi.org/10.1016/j.maturitas.2026.108961