Low body mass index and lymphocytopenia associate with Mycobacterium avium complex pulmonary disease in patients with rheumatoid arthritis
2019
AbstractObjectives: Patients with rheumatoid arthritis (RA) are at an increased risk of Mycobacterium avium complex pulmonary disease (MAC-PD). We aimed to identify factors associated with MAC-PD in RA patients, and investigate their clinical significance for diagnosis of this disease.Methods: We examined 396 patients with RA for the presence of MAC-PD, using the criteria of the American Thoracic Society and conducted three years of follow-up on these patients. Multivariate logistic analyses were employed for selecting factors associated with MAC-PD. We developed a point system based on these factors which we call MAC-PD score to improve diagnosis of MAC-PD.Results: During this study, 14 out of 396 patients were newly diagnosed with MAC-PD. Multivariate analyses revealed body mass index (BMI) <18.0 kg/m2 and lymphocyte count <1500/μl were associated with MAC-PD in RA patients. Points were assigned to them and totalled to provide the MAC-PD score. Among 20 patients with high-resolution computer tomography ...
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