Clinical Pulmonary Infection Score

A score > 6 at baseline or at 72 hours is considered suggestive of pneumonia. If <= 6 at 72 hours patient probably doesn't have pneumonia and antibiotics probably can be stopped.

References:

Pugin J. Minerva Anestesiol. 2002 Apr;68(4):261-5 -> PubMed

Singh N. Am J Respir Crit Care Med. 2000 Aug;162(2 Pt 1):505-11 -> PubMed

"Short-course Empiric Antibiotic Therapy for Patients with Pulmonary Infiltrates in the Intensive Care Unit" Am J Respir Crit Care Med Vol 162. pp 505–511, 2000.