Reply to Fabio and Carrabba TO THE EDITOR—We appreciate the letter

[1] regarding our article evaluating the performance of the Pneumonia Severity Index (PSI) and CURB-65 (confusion, urea, respiratory rate, blood pressure, age ≥65) scoring systems in predicting 30-day mortality in patients with healthcare-associated pneumonia (HCAP) compared to those with community-acquired pneumonia (CAP) [2]. They evaluated the discrimi-natory powers of the recently proposed scoring systems, A-DROP (age, dehydra-tion, respiratory failure, orientation dis-turbance, and low blood pressure) [3] and SOAR (systolic blood pressure, oxy-genation, age, and respiratory rate) [4], which were developed to identify the high-mortality-risk patients with CAP, for 30-day mortality in patients with HCAP. In addition, they evaluated the influence of the age variable on the per-formance of PSI score in predicting 30-day mortality in patients with HCAP using the modified PSI excluding the age variable [5]. We also tested these scoring systems retrospectively using our study popula-tion. As a result, the estimated areas under the curve (AUC) of A-DROP and SOAR were 0.682 (95 % confidence in-terval [CI],.612–.752) and 0.618 (95% CI,.544–.693), respectively, which were not statistically different from 0.679 (95 % CI,.619–.739) of the PSI class in patients with HCAP (P =.922 and P =.067, Hanley-McNeil test). The dis-criminatory power of modified PSI scor