In a questionnaire, patients are asked to rate their opinion to a statement with a ‘1’ referring to not agreeing at all, to a ‘5’ referring to total agreement. Twenty patients complete the survey and the results are tabulated under a variable named ‘Responses to statement ‘.
What is an appropriate data type for this variable?
This and the following few questions pertains to the article: Amoxicillin plus temocillin as an alternative empiric therapy for the treatment of severe hospital-acquired pneumonia: results from a retrospective audit In the healthcare setting pertaining to this setting a decision was made to change the standard antibiotic therapy for the treatment of patients with severe hospital-acquired pneumonia. These are difficult decisions to make due to the fact that it may directly impact the wellbeing of patients. A retrospective audit was conducted to assess the effect of this change.
What type of research was conducted in this study?
Suppose a study is planned to compare the effectiveness of the two types of antibiotics by selecting 100 patients and randomly assigning 50 of them to receive a new antibiotic number and the other 50 to receive the antibiotic used routinely. Both the patients and the medical personnel (including those who evaluate the treatment and collect the data) are blinded as to which antibiotic the patients receive until after the results of the analysis is available.
What is this type of study?
Researchers are interested in the use of screening mammography and it’s efficacy in preventing mortality from breast cancer. They form two groups of patients, pre- and post-menopausal. Patient files from a radiology unit were used in this study and included all patients seen in the last year.
What is the sampling strategy appropriate in this study for distinguishing between these two groups?
Researchers require 20 patients for their analysis of a new drug. Sixty equally suitable volunteers signed up to be part of the study. Every third volunteer on the list was selected to make up the sample.
What is the sampling strategy appropriate in this study?