Statistical analysis

All data are presented as numbers (percentage) and mean ± standard deviation for categorical and continuous variables, respectively. Categorical variables were compared using the χ2 or Fisher’s exact test. Differences in continuous variables were analyzed using Mann–Whitney U test. We utilized Logistic regression analysis to investigate associated factors with uveitis. Independent variables were selected based on statistical significance (P-value < 0.1) for univariate and multivariate analyses. Logistic regression analysis with backward selection was used for univariate and multivariate analyses to calculate odds ratios (OR) with 95% confidence intervals (CI). All tests of significance were two-sided, and a P-value of < 0.05 was considered indicative of statistical significance. As bronchoalveolar lavage was performed only in a subset of enrolled patients, we conducted a subgroup analysis with patients who received bronchoalveolar lavage at the initial time of diagnosis. All analyses were performed using SPSS software (version 24.0; Chicago, IL, USA).