Dyrbye et al 2018. A Pragmatic Approach for Organizations to Measure Health Care Professional Well-Being. NAM Perspectives. Discussion Paper, National Academy of Medicine, Washington, DC. https://doi.org/10.31478/201810b
Dyrbye LN, Shanafelt TD, Johnson PO, Johnson LA, Satele D, West CP A cross-sectional study exploring the relationship between burnout, absenteeism, and job performance among American nurses. BMC Nurs. 2019 Nov 21;18:57. doi: 10.1186/s12912-019-0382-7. eCollection 2019.
Frone MR, Tidwell MO The meaning and measurement of work fatigue: Development and evaluation of the Three-Dimensional Work Fatigue Inventory (3D-WFI). J Occup Health Psychol. 2015 Jul;20(3):273-288. doi: 10.1037/a0038700. Epub 2015 Jan 19.
Letterie G, Fox D Lawsuit frequency and claims basis over lost, damaged, and destroyed frozen embryos over a 10-year period. F S Rep. 2020 Jul 9;1(2):78-82. doi: 10.1016/j.xfre.2020.06.007. eCollection 2020 Sep.
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.
