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논문 기본 정보

자료유형
학술저널
저자정보
김기훈 (부산대학교) 이주희 (Thyroscope Inc. Ulsan Korea) 안창호 (분당서울대학교병원) 유형원 (분당서울대학교병원) 최준영 (분당서울대학교병원) 이호영 (서울대학교) 이원우 (서울대학교) 문재훈 (분당서울대학교병원)
저널정보
대한내분비학회 Endocrinology and Metabolism Endocrinology and Metabolism Vol.36 No.5
발행연도
2021.10
수록면
1,121 - 1,130 (10page)
DOI
https://doi.org/10.3803/EnM.2021.1216

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Background: Heart rate (HR) monitored by a wearable device (WD) has demonstrated its clinical feasibility for thyrotoxicosis subjects. However, the association of HR monitored by wearables with hypothyroidism has not been examined. We assessed the association between serum thyroid hormone concentration and three WD-HR parameters in hypothyroid subjects. Methods: Forty-four subjects scheduled for radioactive iodine therapy (RAI Tx) after thyroid cancer surgery were included. Thirtysubjects were prepared for RAI Tx by thyroid hormone withdrawal (hypothyroidism group) and 14 subjects by recombinant humanthyrotropin (control group). Three WD-HR parameters were calculated from the HR data collected during rest, during sleep, andfrom 2:00 AM to 6:00 AM, respectively. We analyzed the changes in conventionally measured resting HR (On-site rHR) and WDHR parameters relative to thyroid hormone levels. Results: Serum free thyroxine (T4) levels, On-site rHR, and WD-HR parameters were lower in the hypothyroid group than in thecontrol group at the time of RAI Tx. WD-HR parameters also reflected minute changes in free T4 levels. A decrease in On-site rHRand WD-HR parameters by one standard deviation (On-site rHR, approximately 12 bpm; WD-HR parameters, approximately 8bpm) was associated with a 0.2 ng/dL decrease in free T4 levels (P<0.01) and a 2-fold increase of the odds ratio of hypothyroidism(P<0.01). WD-HR parameters displayed a better goodness-of-fit measure (lower quasi-information criterion value) than On-siterHR in predicting the hypothyroidism. Conclusion: This study identified WD-HR parameters as informative and easy-to-measure biomarkers to predict hypothyroidism.

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