RESULTS	Factors independently associated with an increased odds of hospitalization included PSI risk classes II and III , the presence of medical or psychosocial contraindications to outpatient treatment , comorbid conditions that were not contained in the PSI ( cognitive impairment , history of coronary artery disease , diabetes mellitus , or pulmonary disease ) , multilobar radiographic infiltrates , and home therapy with oxygen , corticosteroids , or antibiotics before presentation .\