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Is Preoperative Vitamin D Deficiency a Risk Factor for Postoperative Symptomatic Hypocalcemia in Thyroid Cancer Patients Undergoing Total Thyroidectomy Plus Central Compartment Neck Dissection?

Authors
 Kim Won Woong  ;  Chung So-Hyang  ;  Ban Eun Jeong  ;  Lee Cho Rok  ;  Kang Sang-Wook  ;  Jeong Jong Ju  ;  Nam Kee-Hyun  ;  Chung Woong Youn  ;  Park Cheong Soo 
Citation
 THYROID, Vol.25(8) : 911-918, 2015 
Journal Title
THYROID
ISSN
 1050-7256 
Issue Date
2015
MeSH
Adult ; Calcium/blood ; Dietary Supplements ; Female ; Humans ; Hypocalcemia/blood* ; Hypocalcemia/pathology ; Inpatients ; Linear Models ; Male ; Middle Aged ; Neck Dissection* ; Parathyroid Glands/pathology ; Parathyroid Hormone/blood ; Postoperative Complications* ; Postoperative Period ; Preoperative Period ; Prospective Studies ; Retrospective Studies ; Risk Factors ; Thyroid Neoplasms/blood* ; Thyroid Neoplasms/surgery ; Thyroidectomy ; Vitamin D/metabolism ; Vitamin D Deficiency/blood*
Abstract
BACKGROUND: Although some studies have reported that preoperative vitamin D deficiency (VDD) is a risk factor for hypocalcemia after total thyroidectomy (TT) in patients with nontoxic multinodular goiter or Graves' disease, the association between VDD and postoperative hypocalcemia in thyroid cancer patients undergoing TT plus central compartment neck dissection (CCND) remains unclear. This study evaluated whether preoperative VDD was associated with postoperative symptomatic hypocalcemia.
MATERIALS AND METHODS: Data were collected prospectively between September 2012 and May 2013. A total of 267 consecutive thyroid cancer patients who underwent TT with CCND were analyzed. Patients were divided into two groups--VDD or non-VDD--by preoperative vitamin D level of <10 or ≥10 ng/mL. Symptomatic hypocalcemia was defined as serum calcium <8.2 mg/dL and symptoms or signs of hypocalcemia. The rates of postoperative symptomatic hypocalcemia and clinicopathological features were compared between the two patient groups.
RESULTS: The rate of postoperative symptomatic hypocalcemia was higher in the VDD group than in the non-VDD group (43.8% vs. 30.4%, p=0.043). By logistic regression analysis, predictive factors for postoperative symptomatic hypocalcemia included a preoperative vitamin D level of <10 ng/mL (p=0.007; odds ratio=3.00). In patients who had postoperative intact parathyroid hormone (iPTH) levels <15 pg/mL, symptomatic hypocalcemia was more common in the VDD group than in the non-VDD group (77.5% vs. 53.2%, p=0.008). The findings show that a preoperative vitamin D threshold level of >20 ng/mL reduced the risk of symptomatic hypocalcemia by 72% when compared with patients with VDD (p=0.003).
CONCLUSION: VDD is significantly associated with postoperative symptomatic hypocalcemia in thyroid cancer patients undergoing TT plus CCND. VDD was predictive for symptomatic hypocalcemia when patients had postoperative serum iPTH levels <15 pg/mL. Thus, preoperative supplementation with oral vitamin D should be considered to minimize postoperative symptomatic hypocalcemia.
Full Text
http://online.liebertpub.com/doi/10.1089/thy.2014.0522
DOI
10.1089/thy.2014.0522
Appears in Collections:
1. College of Medicine (의과대학) > Dept. of Surgery (외과학교실) > 1. Journal Papers
Yonsei Authors
Kang, Sang Wook(강상욱) ORCID logo https://orcid.org/0000-0001-5355-833X
Nam, Kee Hyun(남기현) ORCID logo https://orcid.org/0000-0002-6852-1190
Park, Cheong Soo(박정수)
Ban, Eun Jeong(반은정)
Lee, Cho Rok(이초록) ORCID logo https://orcid.org/0000-0001-7848-3709
Chung, Woong Youn(정웅윤)
Jeong, Jong Ju(정종주) ORCID logo https://orcid.org/0000-0002-4155-6035
URI
https://ir.ymlib.yonsei.ac.kr/handle/22282913/141578
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