Community acquired pneumonia (CAP) is one of the most common infectious diseases and contributes significantly to morbidity, mortality and costs [1]. In fact, it has been ranked as the third leading cause of death worldwide [2]. Because of this, it is important to identify risk factors for the severity, which could help predict the prognosis of patients with CAP and improve their management, thus mitigating the negative results of this disease [3]. However, to date little attention has been paid to potential contributors to CAP-associated deaths [4].
