MON-183 Adrenal Androgen Control and Steroidal Side Effects in Adolescents and Adults with Congenital Adrenal Hyperplasia Treated with Glucocorticoids

Introduction: Classic congenital adrenal hyperplasia (CAH) due to 21-hydroxylase deficiency is a rare autosomal recessive disorder that results in little or no cortisol biosynthesis, increased production of precursor steroids, and excess production of adrenal androgens. Glucocorticoid (GC) treatment, the current standard of care for CAH, is used to correct cortisol deficiency and reduce excessive androgens. Elevated 17-hydroxyprogesterone (17OHP) is used for diagnosis and management. GC titration to achieve 17OHP <1000 ng/dL may be targeted for adrenal androgen control; however, patients with 17OHP <1000 ng/dL might be at risk for complications of long-term GC excess. This real-world study evaluated adrenal androgen levels and potential GC complications in adolescents and adults with CAH. Methods: TriNetX, a research network that includes electronic medical records from >37 million U.S. patients, was searched on 30Aug2019 for patients who met the following criteria: diagnosis code of E25.0 (ICD-10) or 255.2 (ICD-9); history of GC use; available 17OHP laboratory result; and ≥15 years of age (“grown”) at the most recent 17OHP assessment. Patients were categorized as “adequately controlled” (17OHP <1000 ng/dL) or “poorly controlled” (17OHP ≥1000 ng/dL). Assessments included: demographics; laboratory results for 17OHP, adrenocorticotropic hormone (ACTH), and androstenedione (A4); and low-density lipoprotein (LDL). Adequately vs. poorly controlled groups were compared using Chi-square tests and t-tests. Results: Of 511 grown CAH patients, 352 were adequately controlled and 159 were poorly controlled. Mean concentrations for 17OHP were 244 and 5939 ng/dL in the adequately and poorly controlled cohorts, respectively (p<0.01). Adequately controlled patients also had lower ACTH and A4 than poorly controlled patients: ACTH (72 vs 389 pg/mL, p<0.01); A4 (82 vs 256 ng/dL, p<0.01). Compared to poorly controlled patients, adequately controlled patients were more likely to be female (81% vs 57%, p<0.01) and older (mean birth year: 1981 vs 1986, p<0.01). Adequately controlled patients also had evidence of more metabolic and infection complications, including higher mean LDL (105 vs 94.3 mg/dL, p=0.02), more type 2 diabetes mellitus (9% vs 4%, p=0.08), and more respiratory tract infections (21% vs 11%, p=0.01). Conclusions: In this retrospective analysis, patients with adequately controlled CAH (17OHP <1000 ng/dL) had better adrenal androgen control (lower A4) but also higher rates of complications potentially related to excessive GC exposure. These findings highlight the current challenges of managing CAH with GC regimens alone.