A researcher designed a study to examine the effects of calcium supplementation on bone density. She randomly assigned subjects to either receive no calcium supplementation, receive the ADA recommended dose of calcium supplementation, or to receive twice the ADA recommended dose of calcium supplementation. After 6 months, she measures the bone density of all subjects and she wants to compare the mean bone density of the three groups. She also wanted to examine if the effect of calcium supplementation on bone density was different between women under 50 years old and women over 50 years old. What statistical test would be best to study these questions?

Which of the following study design characteristics is found in Experimental studies but NOT in Quasi-experimental studies?

A researcher is studying whether there is a decrease in central line associated blood stream infection (CLABSI) rates among medical ICU patients when hubs are scrubbed with chlorhexidine instead of alcohol. In, this example, what is the dependent variable?

A researcher is studying whether music therapy is effective in decreasing anxiety among adolescent pre-operative patients. Adolescents will be randomized to a group that listens to music before surgery or a group that receives standard care (no music offered). Right before they are taken to the OR, patients are asked to fill out a ANX scale that measures anxiety. In this example, what is the independent variable?

A researcher is studying the effectiveness of a job training program with unemployed homeless women. She provides the job training program to a group of unemployed homeless women and then determines their employment status 3 months, 6 months, 1 year, 3 years, 5 years, and 10 years after the training is complete. The threat to internal validity that she should be most concerned about is:

List 4 groups that are considered vulnerable populations in research:.

A researcher plans to study whether alcohol consumption is associated with proteinuria in patients with chronic diseases. Which study design is most appropriate?

A researcher is studying the effect of diabetes education on patients’ HbA1c. After the patients complete the diabetes education, the investigator brings them into a room with a buffet of lunch options. The patients socialize and eat lunch. While they are eating, the investigator watches the food choices that the patients make and notes their choices on a food checklist. This type of data collection is called:

A patient told her nurse that she heard that wearing a cooling cap could prevent hair loss resulting from chemotherapy infusions. The nurse decided to search the literature to see if there was evidence supporting the practice among patients receiving chemotherapy infusions. What type of EBP question is this an example of?

The primary role of the Institutional Review Board (IRB) is to: