Compared to younger patients, older subjects aged 65 years and above hospitalized with CAP were more likely to have severe pneumonia and longer LOS. Presence of severe pneumonia, dysphagia, chronic renal disease, hypoalbuminaemia and age of more than 65 years were significantly associated with longer LOS for all patients. However, in the younger group, only hypoalbuminaemia remained a significant factor. In the elderly patients, severe pneumonia, dysphagia and type of residence were important factors predicting longer LOS.