Development of a normal tissue complication probability (NTCP) model for radiation-induced hypothyroidism in nasopharyngeal carcinoma patients

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Abstract: Background
The objectives of this study were to build a normal tissue complication probability (NTCP) model of radiation-induced hypothyroidism (RHT) for nasopharyngeal carcinoma (NPC) patients and to compare it with other four published NTCP models to evaluate its efficacy.

Methods
Medical notes of 174 NPC patients after radiotherapy were reviewed. Biochemical hypothyroidism was defined as an elevated level of serum thyroid-stimulating hormone (TSH) value with a normal or decreased level of serum free thyroxine (fT4) after radiotherapy. Logistic regression with leave-one-out cross-validation was performed to establish the NTCP model. Model performance was evaluated and compared by the area under the receiver operating characteristic curve (AUC) in our NPC cohort.

Results
With a median follow-up of 24 months, 39 (22.4%) patients developed biochemical hypothyroidism. Gender, chemotherapy, the percentage thyroid volume receiving more than 50 Gy (V50), and the maximum dose of the pituitary (Pmax) were identified as the most predictive factors for RHT. A NTCP model based on these four parameters were developed. The model comparison was made in our NPC cohort and our NTCP model performed better in RHT prediction than the other four models.

Conclusions
This study developed a four-variable NTCP model for biochemical hypothyroidism in NPC patients post-radiotherapy. Our NTCP model for RHT presents a high prediction capability

Location: Deutsche Nationalbibliothek Frankfurt am Main

Extent: Online-Ressource

Language: Englisch

Notes: BMC cancer. - 18, 1 (2018) , 575, ISSN: 1471-2407

Event: Veröffentlichung

(where): Freiburg

(who): Universität

(when): 2019

Creator: Luo, Ren
Wu, Vincent W. C.
He, Binghui
Gao, Xiaoying
Xu, Zhenxi
Wang, Dandan
Yang, Zhining
Li, Mei
Lin, Zhixiong

Contributor: Universitätsklinikum Freiburg. Klinik für Strahlenheilkunde

DOI: 10.1186/s12885-018-4348-z

URN: urn:nbn:de:bsz:25-freidok-1454548

Rights: Open Access; Der Zugriff auf das Objekt ist unbeschränkt möglich.

Last update: 15.08.2025, 5:23 AM UTC

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Associated

Luo, Ren
Wu, Vincent W. C.
He, Binghui
Gao, Xiaoying
Xu, Zhenxi
Wang, Dandan
Yang, Zhining
Li, Mei
Lin, Zhixiong
Universitätsklinikum Freiburg. Klinik für Strahlenheilkunde
Universität

Time of origin

2019

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Development of a normal tissue complication probability (NTCP) model for radiation-induced hypothyroidism in nasopharyngeal carcinoma patients

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