| 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 |
[2] Hydrocortisone, IV::Riffat F, Jefferson N, Bari N, McGuinness J. Acute supraglottitis in adults. Ann OtolRhinolLaryngol. 2011 May;120(5):296-9. http://www.ncbi.nlm.nih.gov/pubmed/21675584
Hydrocortisone, IV: Mayo-Smith MF, Spinale JW, Donskey CJ, Yukawa M, Li RH, Schiffmann FJ. Acute epiglottitis: an 18-year old experience in Rhode Island. Chest 1995;108:1640–7. http://www.ncbi.nlm.nih.gov/pubmed/7497775
Hydrocortisone, IV: Bizaki AJ, Numminen J, Vasama JP, Laranne J, Rautiainen M. Acute supraglottitis in adults in Finland: review and analysis of 308 cases. Laryngoscope. 2011 Oct;121(10):2107-13. http://www.ncbi.nlm.nih.gov/pubmed/21898436
Hydrocortisone, IV: Wick R, Ballmer PE, Haller A. Acute epiglottitis in adults. Swiss Med Wkly 2002; 132: 541–7. http://www.ncbi.nlm.nih.gov/pubmed/12557859
Hydrocortisone, IV: Hafidh MA, Sheahan P, Keogh I, Walsh RM. Acute epiglottitis in adults: a recent experience with 10 cases. J Laryngol Otol. 2006 Apr;120(4):310-3. http://www.ncbi.nlm.nih.gov/pubmed/16623975