The Study
A Randomized Study of Comparison of the Incidence of Postoperative Hypocalcemia in Patients following Total Thyroidectomy versus Hemithyroidectomy
This study compared two types of thyroid surgery and found that removing the whole thyroid is more likely to cause low calcium than removing just half. It’s like flipping a coin to decide who gets which surgery — that helps us believe the difference is real. But it doesn’t prove the surgery itself is the only reason, because the doctors and patients knew which surgery they got.
Analysis score
Maximum 90 for a randomized controlled trial.
Where the score came from
When doctors remove the whole thyroid gland, sometimes the nearby glands that control calcium get hurt — leading to low calcium levels.
Where does this study sit?
Reviews of RCTs (Meta-analyses)
Max 100Randomized Trials
Max 90Reviews of Cohort Studies
Max 85Cohort Studies
Max 72Reviews of Case-Control Studies
Max 63Case-Control Studies
Max 58Cross-Sectional & Case Series
Max 50Expert Opinion
Max 551 / 100
Quality score
Participants are randomly assigned to treatment or control groups, minimizing bias. The gold standard for testing whether an intervention causes an effect.
Key takeaways
Summary
Based on the study abstract and findings.
- 1Yes — nearly 1 in 5 patients felt symptoms after full removal, and 1 in 25 had lasting low calcium, meaning this is a real and serious risk.
- 2After full thyroid removal: 38.5% had low calcium right after surgery, 19.8% felt symptoms like tingling, and 4.4% still had low calcium 6 months later.
- 3After half removal: only 5.5%, 2.2%, and 0% respectively.
Score breakdown, methodology, conflicts of interest, evidence analysis & raw study data
Publication
Journal
Biological and Clinical Sciences Research Journal
Year
2025
Authors
Maria Baig, Waqas Javaid
Related Content
Claims (6)
Patients with benign multinodular goiter who undergo total thyroidectomy experience a higher rate of low blood calcium levels, both short-term and long-term, than those who undergo removal of only one lobe of the thyroid.
Patients who undergo complete removal of the thyroid gland for benign multinodular goiter have a 38.5% chance of developing low blood calcium within 48 hours after surgery, while those who have only half the thyroid removed have a 5.5% chance.
After total thyroidectomy, nearly one in five patients develops low calcium symptoms within two days, while only about two in 100 patients experience the same after hemithyroidectomy.
Thyroidectomy is a surgery in which the entire thyroid gland is removed.
After complete removal of the thyroid gland, 4.4% of patients develop low blood calcium that lasts longer than six months; after removal of only half the thyroid, this does not occur.
After removal of the entire thyroid gland, parathyroid hormone levels are lower at 48 hours and 6 months compared to removal of only half the thyroid gland.
Not medical advice. For informational purposes only. Always consult a qualified healthcare professional before making health decisions.