| Level I | Good quality evidence |
Systematic review of RCTs with consistent findings High quality individual RCT |
| Level II |
Limited quality patient orientated evidence |
Systematic review of lower quality studies or studies with inconsistent findings Low quality clinical trial Cohort studies Case-control studies |
| Level III | Other |
Consensus guidelines, extrapolations from bench research, usual practice, opinion, disease-oriented evidence (intermediate or physiologic outcomes only), or case series |
[38] Duration of antibiotic therapy (community acquired pneumonia): Tansarli GS, Mylonakis E. Systematic Review and Meta-analysis of the Efficacy of Short-Course Antibiotic Treatments for Community-Acquired Pneumonia in Adults.Antimicrob Agents Chemother. 2018 Aug 27;62(9). pii: e00635-18. https://www.ncbi.nlm.nih.gov/pubmed/29987137
Duration of antibiotic therapy (community acquired pneumonia): Boyles TH, Brink A, Calligaro GL, Cohen C, Dheda K, Maartens G, et al; South African Thoracic Society; Federation of Infectious Diseases Societies of Southern Africa. South African guideline for the management of community-acquired pneumonia in adults. J Thorac Dis. 2017 Jun;9(6):1469-1502. https://www.ncbi.nlm.nih.gov/pubmed/28740661
Duration of antibiotic therapy (community acquired pneumonia): Metlay JP, Waterer GW, Long AC, Anzueto A, Brozek J, Crothers K, et al. Diagnosis and Treatment of Adults with Community-acquired Pneumonia. An Official Clinical Practice Guideline of the American Thoracic Society and Infectious Diseases Society of America. Am J Respir Crit Care Med. 2019 Oct 1;200(7):e45-e67. https://www.ncbi.nlm.nih.gov/pubmed/31573350