Pleural fluid interferon-gamma and adenosine deaminase levels in tuberculosis pleural effusion: a cost-effectiveness analysis

Study sample Power calculations were not performed. A sample of 68 consecutive patients with evidence of pleural effusion on chest radiographs was initially identified. After applying the exclusion criteria, 52 patients were included in the study. The characteristics of the initial study sample were not reported. However, demographic and clinical information was provided for those patients with TB and non-TB pleural effusion. The patients with TB pleural effusion (n=35; 25 men) had a mean age of 28.5 (+/9.2) years, while those with non-TB pleural effusion (n=17; 12 men) had a mean age of 49.6 (+/13.1) years. The patients in the non-TB group were significantly older than those with TB pleural effusion.