. 2018 Feb 13;18(2):52–56. doi: 10.1016/j.tjem.2018.01.002

Table 1.

Types of evidences in certain diseases.

Type of Evidence	Disease	Source
Strong	AECOPD ACPE Immunocompromised patients Facilitation of weaning in COPD patients	Multiple randomized, controlled trials and meta-analyses
Intermediate	Preoxygenation in hypoxemic respiratory failure Postextubation respiratory failure	Single controlled trial and cohort series or multiple randomized studies with conflicting findings
Weak	ALI/ARDS Neuromuscular disease Pneumonia Status asthmaticus	Cohort studies, anecdotal reports and case series

AECOPD: Acute exacerbation of chronic obstructive pulmonary disease, ACPE: Acute cardiogenic pulmonary edema, COPD: Chronic obstructive pulmonary disease, ALI: Acute lung injury, ARDS: Acute respiratory distress syndrome.²^,³