Title: Association and predictors of secondary pulmonary hypertension amongst patients suffering from Takayasu’s arteritis - a nationwide study.
Introduction: Most previous studies on patients with Takayasu’s arteritis (TA) along with PHTN have focused on clinical symptoms and imaging characteristics. Data on the predictors of secondary PHTN amongst patients suffering from takayasu’s arteritis are scarce.
Aims: Primary aim of our study was to identify predictors of developing secondary pulmonary hypertension amongst patients suffering from takayasu’s arteritis.
Methods: A population-based cross-sectional study was performed in adult US hospitalizations from the nationwide inpatient sample (NIS-2016-2018). We identified patients with TA and subgrouped them into patients with and without PHTN using ICD-10 codes. Univariate analysis was performed using unpaired student's t test and chi-square test to identify prevalence of comorbidities amongst Takayasu’s arteritis patients with secondary pulmonary hypertension. Mix effects multivariate survey logistic regression analyses weighted for variables were performed to identify comorbidities (adjusted odds ratio [aOR] and 95% confidence interval [95%CI]) associated with PTHN amongst TA. p <0.05 was considered as significant.
Results: Out of 3560 patients with TA, prevalence of PHTN was 6.04%. The odds of developing secondary PHTN among TA patients is 1.56 times more than the patients who do not have TA (aOR 1.56, 95%CI 1.09-2.23). We noticed higher prevalence odds of secondary PHTN among patients with TA in age group of 50-75 years (aOR 1.23, 95% CI 1.21-1.25), age group of more than 75 years (1.14, 1.11-1.17), black race (1.35, 1.34-1.36), and female sex (1.33, 1.32-1.34). The odds of developing PHTN in patients with takayasu arteritis was seen to be 6.53 higher (6.53, 6.48-6.58) in the presence of CHF as a comorbidity than in the absence of it . Other comorbidities associated with PHTN among patients with Takayasu arteritis were essential HTN (1.23, 1.22-1.24), IHD (1.21, 1.20-1.22), atrial fibrillation (1.5, 1.49-1.51), AIDS (1.36, 1.28-1.44), renal failure (1.42, 1.42-1.43) and obesity (1.54, 1.53-1.55). 
Conclusion: Predictors of developing secondary PHTN in patients with TA are advanced age, black race, female sex, CHF, essential HTN, IHD, atrial fibrillation, AIDS, renal failure, and obesity. Early identification of these risk factors helps to mitigate the burden associated with pulmonary hypertension. Our findings are limited due to missing data on PHTN severity and long-term followup.

Association and Predictors of secondary pulmonary hypertension amongst patients suffering from Takayasu’s Arteritis - a Nationwide Study

Association and predictors of secondary pulmonary hypertension amongst patients suffering from Takayasu’s arteritis - a nationwide study

Clinical and Translational Research | Pulmonology / Critical Care Medicine / Sleep Medicine

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Association and Predictors of secondary pulmonary hypertension amongst patients suffering from Takayasu’s Arteritis - a Nationwide Study

Association and predictors of secondary pulmonary hypertension amongst patients suffering from Takayasu’s arteritis - a nationwide study

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