Croup — Impact of Cold Air Exposure on Croup Symptoms
Citation(s)
Bjornson CL, Williamson J, Johnson DW Telephone Out Patient Score: The Derivation and Validation of a Telephone Follow-up Assessment Tool for Use in Clinical Research in Children With Croup. Pediatr Emerg Care. 2016 May;32(5):290-7. doi: 10.1097/PEC.0000
Hanna J, Brauer PR, Morse E, Berson E, Mehra S Epidemiological analysis of croup in the emergency department using two national datasets. Int J Pediatr Otorhinolaryngol. 2019 Nov;126:109641. doi: 10.1016/j.ijporl.2019.109641. Epub 2019 Aug 13.
Johnson DW Croup. BMJ Clin Evid. 2014 Sep 29;2014:0321.
Moore M, Little P Humidified air inhalation for treating croup. Cochrane Database Syst Rev. 2006 Jul 19;(3):CD002870. doi: 10.1002/14651858.CD002870.pub2.
Outdoor Cold Air Exposure Versus Room Temperature for Croup Symptoms in Pediatric Emergency Departments: a Randomized Controlled Trial
Interventional studies are often prospective and are specifically tailored to evaluate direct impacts of treatment or preventive measures on disease.
Observational studies are often retrospective and are used to assess potential causation in exposure-outcome relationships and therefore influence preventive methods.
Expanded access is a means by which manufacturers make investigational new drugs available, under certain circumstances, to treat a patient(s) with a serious disease or condition who cannot participate in a controlled clinical trial.
Clinical trials are conducted in a series of steps, called phases - each phase is designed to answer a separate research question.
Phase 1: Researchers test a new drug or treatment in a small group of people for the first time to evaluate its safety, determine a safe dosage range, and identify side effects.
Phase 2: The drug or treatment is given to a larger group of people to see if it is effective and to further evaluate its safety.
Phase 3: The drug or treatment is given to large groups of people to confirm its effectiveness, monitor side effects, compare it to commonly used treatments, and collect information that will allow the drug or treatment to be used safely.
Phase 4: Studies are done after the drug or treatment has been marketed to gather information on the drug's effect in various populations and any side effects associated with long-term use.
