THU196 Insulin-like Growth Factor-1 As A Screening Tool For Central Precocious Puberty

Abstract Disclosure: L. Chung: None. M. Im: None. Gonadotropin-releasing hormone (GnRH) stimulation test is the gold standard test for diagnosing central precocious puberty (CPP), which needs time and effort to perform. Recently, many studies confirmed that Insulin-like growth factor-1 (IGF-1) is involved in the initiation and progression of puberty. With this inspection, we assumed that the IGF-1 level might be correlated with the pubertal stage in central precocious puberty. This study aimed to investigate the value of IGF-1 levels in screening central precocious puberty. The medical records of 359 patients with a chief complaint of premature breast development and visited the pediatric endocrinology clinic in Myongji Hospital from January 2017 to October 2022 were reviewed. Two hundred thirty-three girls with central precocious puberty (CPP) and 126 girls with premature thelarche (PT) diagnosed were enrolled. Each subject had IGF-1 and GnRH stimulation test results. The anthropometric data between CPP and PT showed no statistical differences except for weight and the existence of lipomastia. The hormonal indicators including peak luteinizing hormone (peak LH), peak follicular stimulating hormone (peak FSH), and estradiol were statistically different between the two groups (P < 0.001). IGF-1 levels were significantly higher in CPP group than in PT group. The IGF-1 levels were positively correlated with peak LH, the diagnostic indicator of CPP. The area under the curve (AUC) of IGF-1 was 0.709. IGF-1 levels were correlated with the diagnostic indicator of CPP. IGF-1 would be a useful tool for screening CPP. Keywords: girls; IGF-1; GnRH stimulation test; precocious puberty. Presentation: Thursday, June 15, 2023