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JYMS : Journal of Yeungnam Medical Science

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Min Jung Kwak 3 Articles
Adult height in girls with central precocious puberty without gonadotropin-releasing hormone agonist treatment: a retrospective case-control study
Hyun Ji Jang, Min Jung Kwak, Young Mi Kim, Soo-Han Choi, Kyung Hee Park, Hye Won Yoo, Su Jeong Park, Yoon Hee Jo, Ha Young Jo
J Yeungnam Med Sci. 2023;40(Suppl):S81-S86.   Published online November 7, 2023
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AbstractAbstract PDF
The primary aim of this study was to investigate the final adult height (FAH) of girls diagnosed with central precocious puberty (CPP) who were untreated.
We retrospectively analyzed the medical records of 36 girls diagnosed with CPP between 8 and 9 years of age who did not receive treatment, and 206 girls diagnosed with CPP within the same age range who received gonadotropin-releasing hormone (GnRH) agonist treatment. Midparental height (MPH), predicted adult height (PAH) obtained using height and bone age (BA) at the time of diagnosis (PAH for BA), and PAH obtained using the Bayley-Pinneau method (PAH by BP) were calculated. Additionally, height at the time of growth completion was compared with the predicted height.
The FAHs were 160.71±4.56 cm in the untreated group and 159.31±4.26 cm in the treated group. In the untreated group, the FAH was 0.99±4.50 cm shorter than the MPH but 4.29±3.33 cm and 3.46±3.93 cm greater than the PAH for BA and PAH by BP, respectively.
In children diagnosed with CPP between 8 and 9 years of age who were untreated, FAH was greater than PAH for BA and PAH by BP at the time of diagnosis, indicating that the prognosis of FAH was not poor. Therefore, for girls diagnosed with CPP, it is recommended to consider various conditions, such as pubertal onset, height at diagnosis, BA, peak luteinizing hormone level, predicted height, and speed of puberty, when deciding whether to administer GnRH agonists.
Incidence of congenital hypothyroidism by gestational age: a retrospective observational study
Ha Young Jo, Eun Hye Yang, Young Mi Kim, Soo-Han Choi, Kyung Hee Park, Hye Won Yoo, Su Jeong Park, Min Jung Kwak
J Yeungnam Med Sci. 2023;40(1):30-36.   Published online April 12, 2022
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  • 2 Web of Science
  • 2 Crossref
AbstractAbstract PDF
Congenital hypothyroidism (CH) is the leading cause of preventable physical and intellectual disabilities. This study aimed to assess the incidence and clinical characteristics of CH in newborns.
We retrospectively reviewed the medical records of all newborns delivered at the Pusan National University Hospital between January 2011 and March 2021. The incidence of CH was compared according to gestational age, birth weight, and small for gestational age (SGA). The patients aged ≥3 years who could not maintain normal thyroid function and required levothyroxine treatment were diagnosed with permanent CH. Logistic regression analysis was performed to compare CH risks.
Of 3,722 newborns, 40 were diagnosed with CH (1.07%). Gestational age and birth weight were significantly associated with CH incidence. The odds ratios (ORs) of CH in infants delivered at 32–37, 28–31, and <28 weeks were 2.568 (95% confidence interval [CI], 1.141–5.778), 5.917 (95% CI, 2.264–15.464), and 7.441 (95% CI, 2.617–21.159) times higher, respectively, than those delivered at term. The ORs of CH in infants weighing 1,500–2,499 g, 1,000–1,499 g, and <1,000 g were 4.664 (95% CI, 1.928–11.279), 11.076 (95% CI, 4.089–29.999), and 12.544 (95% CI, 4.350–36.176) times greater, respectively, than those in infants weighing ≥2,500 g. The OR of CH was 6.795 (95% CI, 3.553–13.692) times greater in SGA than in non-SGA infants.
The CH incidence in South Korea has increased significantly compared with that in the past. Gestational age, birth weight, and SGA were significantly associated with CH incidence.


Citations to this article as recorded by  
  • History of Neonatal Screening of Congenital Hypothyroidism in Portugal
    Maria José Costeira, Patrício Costa, Susana Roque, Ivone Carvalho, Laura Vilarinho, Joana Almeida Palha
    International Journal of Neonatal Screening.2024; 10(1): 16.     CrossRef
  • The prevalence of hypothyroxinemia in premature newborns
    Renata Stawerska, Marzena Nowak-Bednarek, Tomasz Talar, Marzena Kolasa-Kicińska, Anna Łupińska, Maciej Hilczer, Ewa Gulczyńska, Andrzej Lewiński
    Frontiers in Endocrinology.2022;[Epub]     CrossRef
The Utility of Basal Serum Luteinizing Hormone Levels for Screening Central Precocious Puberty in Girls.
Jung Ki Ju, Hae Lyoung Lee, Young Ah Lee, Sang Keun Chung, Min Jung Kwak
Yeungnam Univ J Med. 2013;30(2):90-94.   Published online December 31, 2013
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  • 3 Download
AbstractAbstract PDF
This study was conducted to examine if basal luteinizing hormone (LH) levels could be useful for screening central precocious puberty (CPP) in girls. METHODS: A total of 90 girls under the age of 8 years were included in this study. They underwent the gonadotropin-releasing hormone (GnRH) stimulation test at Good Gang-An Hospital from March 2008 to December 2012 for evaluation of premature sexual development. Patients were classified into two groups: the pubertal response group of patients who had 5 IU/L peak LH levels in the GnRH stimulation test, and the prepubertal response group of patients who had LH levels <5 IU/L. Chronological and bone ages, height, weight, body mass index, gonadotropin response to GnRH stimulation, and basal levels of LH, follicle-stimulating hormone, and estradiol were studied in both groups. The relationship between basal LH and peak-stimulated LH was evaluated using Spearman's correlation. To determine the optimal cut-off values of basal LH levels for differentiating between two groups, the receiver operating characteristic (ROC) curves were analyzed. RESULTS: When the correlation between basal LH levels and peak LH after GnRH stimulation was analyzed in all subjects (N=90), basal LH levels had a statistically significant positive correlation with peak stimulated LH levels (rs=0.493, p<0.001). The cut-off level of optimal basal LH was 0.1 IU/L, according to the ROC curves. Its sensitivity was 73.3%, and its specificity was 77.8%. CONCLUSION: The study results showed that serum basal LH levels are useful for screening CPP in girls.

JYMS : Journal of Yeungnam Medical Science