Abstract
Introduction
Primary hyperparathyroidism (PHPT) in India is mostly symptomatic with renal and skeletal complications. Evidence on mortality outcomes following parathyroidectomy from India, where the disease is predominantly symptomatic is limited.
Material and methods
This was a prospective study to evaluate mortality outcomes in the Indian PHPT registry over the past 25 years (n = 464). Pre- and postoperative parameters and mortality data were obtained from medical records and/or by verbal autopsy, a method validated by WHO for data collection in settings where several deaths are noninstitutional. Patients were divided into survivor (SG) and nonsurvivor groups (NSG) to ascertain differences in presentation and the effect of parathyroidectomy.
Results
The overall mortality was 8.8% at a median follow-up of 8 years (IQR 1–13) after parathyroidectomy. Chronic kidney disease was the most common background cause of death (43.5%), followed by pancreatitis (28.2%). NSG had significantly more frequent renal dysfunction (91.9% vs 73.9%), anaemia (50 vs 16.6%) and pancreatitis (24.3 vs 6.4%). PTH (61.9 vs 38.3 pmol/l) and baseline creatinine (97.2 vs 70.7 µmol/l) were significantly higher and eGFR lower (66.7 vs 90.7 ml/min/1.73m2) in the NSG than SG. By Cox proportional modelling, renal dysfunction [HR 2.88 (1.42–5.84)], anaemia [HR 2.45 (1.11–5.42)] and pancreatitis [HR 2.65 (1.24–5.66)] on univariate and renal dysfunction [HR 3.33 (1.13–9.77)] on multivariate analysis were significant for mortality. Survival curves demonstrated a significantly higher mortality with lower eGFR values.
Conclusions
Nonsurvivors in PHPT had greater prevalence and more severe baseline renal dysfunction than survivors. Survival after parathyroidectomy was significantly associated with estimated glomerular filtration rate at baseline.
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Abbreviations
- PTH:
-
Parathyroid hormone
- PHPT:
-
Primary hyperparathyroidism
- eGFR:
-
Estimated glomerular filtration rate
- CKD:
-
Chronic kidney disease
- CKD-EPI:
-
Chronic kidney disease-epidemiology collaboration
- MDRD:
-
Modification of diet in renal disease
- CCCR:
-
Calcium creatinine clearance ratio
- USG:
-
Ultrasound
- CT:
-
Computerised tomography
- MRI:
-
Magnetic resonance imaging
- 99Tc:
-
Technetium
- FDG Choline PET:
-
Fluorodeoxy glucose choline positron emission tomography
- DEXA:
-
Dual energy Xray absorptiometry
- OFC:
-
Osteitis fibrosa cystica
- MEN1:
-
Multiple endocrine neoplasia type 1
- ALP:
-
Alkaline phosphatase
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Acknowledgements
We wish to acknowledge the contribution of Ms Anmol in data collection during follow-up.
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LD did data compilation, analysis and interpretation of data, was involved in patient management and drafted the manuscript. SKB conceived the idea, supervised patient management and data compilation, was involved in data interpretation and edited the manuscript. ARB and DD performed surgery on the patients. PD supervised patient management and provided crucial insights. AB supervised patient management and edited the manuscript. AS provided scintigraphic and MP provided radiologic expertise. SMA, PS and PK helped in data collection and follow-up. DSR was involved in data interpretation and edited the manuscript. All authors approved the final version of the manuscript and take responsibility for the integrity of the data analysis.
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774_2021_1256_MOESM1_ESM.tif
Supplementary file1 (TIF 50 KB) Flow diagram depicting the inclusion and exclusion criteria as applied to all patients enrolled in the Indian PHPT Registry
774_2021_1256_MOESM2_ESM.tif
Supplementary file2 (TIF 80 KB) Survival analysis comparing the probability of mortality in PHPT based on tertile of baseline PTH levels classified as (PTH 6.5-50pmol/l, PTH 50-100pmol/l, PTH>100pmol/l). There was no significant difference in mortality associated with PTH tertile; log rank test P = 0.961
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Das, L., Bhadada, S.K., Arvindbhai, S.M. et al. Baseline renal dysfunction determines mortality following parathyroidectomy in primary hyperparathyroidism: analysis of Indian PHPT registry. J Bone Miner Metab 40, 81–91 (2022). https://doi.org/10.1007/s00774-021-01256-9
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DOI: https://doi.org/10.1007/s00774-021-01256-9