A study of 42 patients with carpal tunnel syndrome (symptoms of burning numbness
ID: 3230738 • Letter: A
Question
A study of 42 patients with carpal tunnel syndrome (symptoms of burning numbness in the wrist to difficulty making a fist) was done (“Yoga based intervention for carpal tunnel syndrome,” Garfinkel et al, JAMA 1998; 280:1601-1603). Subjects were randomly assigned to a yoga group or a control (where they were offered a wrist splint to supplement their current treatment). Results showed that subjects in the yoga group had significant improvement in grip strength, while subjects in the control group did not.
What is the response variable in the study?
The improvement in grip strength
The treatment group (either Yoga or control group)
The severity of carpal tunnel syndrome
The age of the patient.
What is the explanatory variable in the study?
The improvement in grip strength
The treatment group (either Yoga or control group)
The severity of carpal tunnel syndrome
The age of the patient.
Can a conclusion that yoga caused the improvement in grip strength be made?
A cause and effect relation might be concluded because the study had a control group.
A cause and effect relation might be concluded because the study was a randomized experiment.
A cause and effect relation cannot be concluded because of the small sample size.
A cause and effect relation cannot be concluded because not all subjects in the control group accepted the splint.
Subjects are measured on their level of C-reactive protein, an indicator of inflammation, as well as several other health risk indicators. They then undergo a month of regular modest daily exercise, and are retested on CRP and the other indicators.
CRP turns out to be skewed, and to have changes that are skewed. What statistical test to check for mean change?
Paired t-test
Unpaired t-test
Wilcoxon
Mann Whitney
Systolic blood pressure is also measured at each of the time points. Assuming changes in this variable are relatively Gaussian (Normally distributed), what test for mean change?
Paired t-test
Unpaired t-test
Wilcoxon
Mann Whitney
Explanation / Answer
Dear student,
According to Chrgg guidelines only first four subparts are answered.
1,The improvement in grip strength is the response variable.
2,The treatment group (either Yoga or control group) is the explanatory variable.
3, A cause and effect relation might be concluded because the study was a randomized experiment.
4,Paired t-test is the test used.
Related Questions
Navigate
Integrity-first tutoring: explanations and feedback only — we do not complete graded work. Learn more.