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Background: Several studies have been focused on interstitial lung disease among patients with established rheumatoid arthritis, with fluctuating incidence and prevalence depending on the methods used.
Patients and Methods: A case- control study design was used in this study performed on 100 cases with RA (50 cases with ILD). Data were analyzed by using Statistical Package of Social Sciences (SPSS) version18. Categorical variables were presented as frequencies and percentages. Continuous variables were presented as means with their confidence interval (CI) and standard deviation. The Pearson's chi-square test was used to determine the associations between categorical variables. A p-value of < 0.05 was considered as statistically significant