Study Design and Patient Selection
The study, published in BJS Open (2026), investigated the effects of parathyroidectomy versus observation in patients aged 65 years or older with primary hyperparathyroidism (pHPT) and mild hypercalcaemia. The randomized clinical trial included 102 participants, with 50 assigned to observation and 52 to surgery. Patients were selected based on ionized calcium levels not exceeding 1.50 mmol/l and a bone mineral density (BMD) Z-score above −2.5 standard deviations. The median age of participants was 71 years (range 65–85). Follow-up lasted two years, with primary outcomes measuring changes in total hip BMD and secondary outcomes assessing lumbar spine BMD. The study used a computer-generated randomization sequence, though no blinding was implemented. Researchers analyzed continuous variables using Satterthwaite’s t-test and performed intention-to-treat analysis via mixed-model repeated-measures ANOVA (MMRM ANOVA).
Key Findings on Bone Mineral Density
At the two-year follow-up, patients who underwent parathyroidectomy showed a mean 1.3% increase in total hip BMD (95% CI −0.2% to 2.8%), while the observation group experienced a 1.4% decrease (95% CI −2.6% to −0.2%). The difference between groups was statistically significant (P = 0.006). For lumbar spine BMD, the surgery group saw a 4.6% increase (95% CI 3.0% to 6.1%), compared to a 0.2% change in the observation group (95% CI −1.1% to 1.4%), with a highly significant difference (P < 0.001). The study also noted a modest reduction in estimated 10-year fracture risk, as calculated by FRAX®. However, BMD at the distal radius decreased in both groups, with no significant difference between them. These results suggest that parathyroidectomy modestly improves BMD in older pHPT patients, particularly in weight-bearing bones like the hip and spine.
Implications for Clinical Practice
The findings indicate that parathyroidectomy may offer a slight benefit in maintaining or improving BMD for older patients with pHPT and mild hypercalcaemia. However, the authors caution against expanding surgical indications based on these results, as the observed effects are modest. The study highlights the need for careful patient selection, particularly for those with minimal symptoms or low fracture risk. The authors emphasize that the long-term impact of surgery on fracture incidence and mortality remains unclear, urging further research. Additionally, the results do not support routine surgical intervention for all older pHPT patients, given the potential risks of surgery and the lack of significant benefits in certain bone sites, such as the distal radius. Clinicians should weigh the risks and benefits of surgery against non-operative management, considering individual patient factors and the potential for future interventions.
Limitations of the Study
The study had several limitations that may affect the interpretation of its findings. The sample size was relatively small, with only 102 participants randomized, and the follow-up period was limited to two years, which may not capture long-term outcomes. Recruitment was slower than anticipated, potentially affecting the study’s generalizability. Additionally, the lack of blinding in the randomization process could introduce bias. The study also did not assess fracture incidence directly, relying instead on FRAX® estimates, which may not fully reflect real-world risks. The authors note that longer-term follow-up is needed to evaluate whether the observed BMD changes translate to meaningful clinical benefits, such as reduced fractures. Furthermore, the study’s focus on patients with mild hypercalcaemia and specific BMD criteria may limit its applicability to broader pHPT populations. These limitations underscore the need for larger, multicenter trials to confirm these results and explore their clinical significance.
Context Within Spine and Musculoskeletal Health
Primary hyperparathyroidism (pHPT) is a condition characterized by excessive parathyroid hormone production, leading to elevated calcium levels and bone loss. The study’s focus on BMD changes in older adults aligns with chiropractic interests in musculoskeletal health, particularly spinal integrity and fracture risk. While the research does not directly address chiropractic interventions, it underscores the importance of monitoring bone health in patients with endocrine disorders. The findings suggest that surgical management of pHPT may have a role in preserving bone density, which is critical for preventing fractures in aging populations. However, the modest benefits observed highlight the need for a multidisciplinary approach to patient care, including non-surgical strategies like lifestyle modifications and medication. Chiropractors may encounter patients with pHPT or related conditions, and understanding the interplay between endocrine health and musculoskeletal function can inform comprehensive care plans. Further research is needed to determine how these findings intersect with chiropractic practices and patient outcomes.