FRI529 Hypothyroidism And Systemic Lupus Erythematosus: A Nationwide Analysis

Disclosure: F. Sami: None. S. Sami: None. A. Razok: None. T. Ayub: None. A. Olafimihan: None. Background: Hypothyroidism is the most common thyroid disease in Systemic Lupus Erythematosus (SLE) and more prevalent in SLE than the general population. Our aim is to study the prevalence, epidemiology and likelihood of hypothyroidism with SLE as well as impact on outcomes and healthcare burden. Methods: The National Inpatient Database from 2016-2019 was used to extract patient populations. Data was stratified to reflect national estimates. Adult patients with principal diagnosis of SLE and hypothyroidism as a primary or secondary diagnosis were identified. Epidemiology was compared. We analyzed mortality rates, hospital charges (THC) and length of stay (LOS). Secondary outcomes included sepsis, congestive heart failure (CHF), renal and respiratory failure, stroke and myocardial infarction (MI). Statistical analysis was performed with STATA17. Univariate and multivariate regression analyses adjusted for confounders. Results: Among 721,090 adult SLE patients, 17.64% had hypothyroidism. In SLE-hypothyroid group, there were more females (93.46% vs 87.35%, odds ratio 2.01) and whites ( 65.82%vs 33.53%, OR 2.37). The mean age was higher (59.95 SD 15.56 vs 50.91 SD 16.94, P-value 0.000) with significantly more patients in 60-80 years group (44.64% vs 28.56%) and less in 18-40 year age group (1.68% vs 29.01%). African-Americans and Hispanics were significantly less in hypothyroid group with OR 0.34 and 0.87 respectively. Charlson comorbidity Index was ssignificantly high (3.2 vs 2.97). Hypothyroidism was significantly more among higher socioeconomic class of SLE patients (20.62% vs 16.7%) and less prevalent among the low socioeconomic class (28.88% vs 35.36%) based on annual income. There was no significant rise in mortality when adjusted for confounders (1.93% vs 1.97%, P-value 0.702), mean length of stay (5.41 vs 5.46, P-value 0.284), or total hospital charges ($63372 vs 64065, P-value 0.273) between two groups. There was a significantly higher prevalence of MI (3.21% vs 2.9%, P-value 0.01,OR 1.11) and CHF (5.94% vs 5%, P-value 0.00,OR 1.2). Prevalence of sepsis (8.92% vs 8.77%, P-value 0.449), renal failure (37.94% vs 37.79%), respiratory failure (37.63% vs 37.84%) and stroke (0.88% vs 0.93%,) was comparable with no significant difference. Odds ratio for hypothyroidism in SLE was 1.5, p-value 0.000. Conclusion: SLE patients with hypothyroidism are more females, Caucasians, of higher mean age, between 60-80 years of age, and from higher socioeconomic status. There is no effect on mortality, LOS and THC, rate of sepsis, stroke, renal and respiratory failure with hypothyroidism. There is a significantly higher risk of MI and CHF. SLE patients have 1.5 times increased risk of developing hypothyroidism. This emphasizes screening at-risk individuals when suspicion arises, for timely diagnoses and improving outcomes. Presentation: Friday, June 16, 2023