Abstract
Background
Vitamin D supplements are readily available as over-the-counter preparations. However, although rare, cases of vitamin D overdose still occur and are associated with nephrocalcinosis and life-threatening hypercalcemia. Errors in manufacturing of nutritional supplements may be a cause of vitamin D intoxication in children. This study aimed to identify factors associated with vitamin D overdose-related nephrocalcinosis in children due to manufacturing errors in supplements.
Methods
This retrospective study reviewed medical charts of pediatric patients with non-registered supplement-related vitamin D overdose at a tertiary referral hospital between 2006 and 2011. Clinical and laboratory characteristics of patients with or without nephrocalcinosis were evaluated. Receiver operating characteristics curve and area under the receiver operating characteristics curve were used to determine the most predictive value of each characteristic.
Results
A total of 44 patients (males: 29; age: 7–62 months) were included. Age ≤ 16.5 months, body weight ≤ 10.25 kg, body height ≤ 78.5 cm, body surface area (BSA) ≤ 0.475 m2, 25-hydroxyvitamin D3 ≥ 143 ng/mL, and calcium ≥ 10.65 mg/dL were predictive of developing nephrocalcinosis with a sensitivity and specificity of > 60%. Univariant analysis revealed that BSA was the most significant anthropometric prognostic factor (odds ratio: 12.09; 95% confidence interval: 2.61–55.72; P = 0.001).
Conclusions
Children with smaller BSAs were more vulnerable to high-dose vitamin D3-related nephrocalcinosis. Physicians and parents should be aware of the potential adverse effects of vitamin D overdose in children.
Graphical abstract
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Data availability
The data generated and analyzed during the current study are available from the corresponding author on reasonable request.
Code availability
Not applicable.
Abbreviations
- AKI:
-
Acute kidney injury
- Alk-P:
-
Alkaline phosphatase
- AUC:
-
Area under receiver operating characteristics curve
- BH:
-
Body height
- BMI:
-
Body mass index
- BSA:
-
Body surface area
- BW:
-
Body weight
- Ca:
-
Calcium
- Ca/Cr:
-
Calcium per creatinine
- CI:
-
Confidence interval
- Cr:
-
Creatinine
- iPTH:
-
Intact parathyroid hormone
- IU:
-
International units
- NC:
-
Nephrocalcinosis
- OR:
-
Odds ratio
- P:
-
Phosphate
- ROC:
-
Receiver operating characteristics
- 1,25(OH)2D3 :
-
1,25-Dihydroxyvitamin D3
- 25(OH)D3 :
-
25-Hydroxyvitamin D
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All authors contributed to the study conception and design. Material preparation, data collection, and analysis were performed by Dr. Hsiang-Ju Lu, Dr. Ming-Dar Lee, and Dr. Brian Pin-Hsuan Chang. The first draft of the manuscript was written by Dr. Tzu-Hua Lin. Dr. Chao-Hsu Lin supervised data collection and critically reviewed the manuscript for endocrinology content. Dr. Jeng-Daw Tsai and Dr. Chun-Chen Lin conceptualized the study and reviewed and revised the manuscript. All authors commented on previous versions of the manuscript. All authors read and approved the final manuscript.
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This retrospective chart review study involving human participants was in accordance with the ethical standards of the institutional and national research committee and with the 1964 Helsinki Declaration and its later amendments or comparable ethical standards. The Human Investigation Committee of Mackay Memorial Hospital approved this study.
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Lin, TH., Lu, HJ., Lin, CH. et al. Nephrocalcinosis in children who received high-dose vitamin D. Pediatr Nephrol 37, 2471–2478 (2022). https://doi.org/10.1007/s00467-022-05512-6
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DOI: https://doi.org/10.1007/s00467-022-05512-6