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Observational Study

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1. Determine whether each of the following is an experiment or an observational study. Also identify the explanatory and response variables.;a. Sixty patients with carpal tunnel syndrome are randomly divided into 2 groups.;One group is treated weekly with both acupuncture and an exercise program.;The other is treated weekly with the exact same exercise regimen, but no;acupuncture. After one year, both groups are questioned about their pain from;the carpal tunnel syndrome.;b. Researcher Eric N. Taylor and others wanted to determine if weight, weight;gain, body mass index (BMI), and weight circumference are associated with;kidney stone formation. To make this determination, they looked at 4,827 cases;of kidney stones covering 46 years. Based on an analysis of the data, they;concluded that obesity and weight gain increase the risk of kidney stone;formation.;c. Researcher Helle Collatz Christensen and co-workers examined the possible;association between the use of cellular phones and the development of acoustic;neuroma (a non-cancerous growth in the inner ear) by comparing 106 cases of;individuals with acoustic neuroma to 212 cases of individuals who did not have;acoustic neuroma. The data obtained included information on the use of;cellular telephones from personal interviews, data from medical records, and;the results of radiological exams.;d. A sample of 504 patients in the early stages of Alzheimer?s disease is randomly;divided into two groups. One group receives an experimental drug regimen;while the other group receives a placebo regimen. The advance of the disease in;the patients is tracked at 1-month intervals over the next year.

 

Paper#35657 | Written in 18-Jul-2015

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