[Expert Solution]: Quasi experiments are studies that are unable…

Quasi experiments are studies that are unable to use randomization to evaluate effectiveness of interventions. This can make it difficult to tease out possible confounders and assess the integrity of any cause and effect claims. Consider this example adapted from a paper in Clinical Infectious Diseases (“The Use and Interpretation of Quasi-Experimental Studies in Infectious Diseases,” Vol. 38, Issue 1, pp. 1586–1591). A hospital wants to know if providing alcohol-based hand cleaners for staff will reduce the rate at which bacterial infections occur in the patient population. The hospital needs to design a study that will address this question. Access the article, read it, and answer the following. Question: The hospital will more likely adopt a quasi-design that collects data for an extended period of time before hand cleaner dispensers are installed, and then compares those findings with data collected after the dispensers are installed. What are two possible sources of confounding with this design that the referenced article mentions? Group of answer choices Quality of medical care and how years of experience of hospital administration. Severity of patient illness and quality of medical care. Quality of medical care and severity of internal, ambient pollution. Severity of patient illness and quality of hand cleaner.