A. Does this study include a control group? Explain. B. Is this an experimental study or an observational study? Explain. C.Is this a completely randomized design or a randomized block design? Explain. D. Which strategy for reducing bias was not adopted in this study? How might its absence have affected the results?
A. Does this study include a control group? Explain. B. Is this an experimental study or an observational study? Explain. C.Is this a completely randomized design or a randomized block design? Explain. D. Which strategy for reducing bias was not adopted in this study? How might its absence have affected the results?
Phlebotomy Essentials
6th Edition
ISBN:9781451194524
Author:Ruth McCall, Cathee M. Tankersley MT(ASCP)
Publisher:Ruth McCall, Cathee M. Tankersley MT(ASCP)
Chapter1: Phlebotomy: Past And Present And The Healthcare Setting
Section: Chapter Questions
Problem 1SRQ
Related questions
Question
100%
A. Does this study include a control group? Explain.
B. Is this an experimental study or an observational study? Explain.
C.Is this a completely randomized design or a randomized block design? Explain.
D. Which strategy for reducing bias was not adopted in this study? How might its absence have affected the results?
Transcribed Image Text:Michalsen et al. (2003) conducted a
study to examine the effects of "leech
therapy" for pain resulting from
osteoarthritis of the knee. Two
treatments were randomly assigned to
51 patients with osteoarthritis of the
knee. Patients in the leech treatment
received 4-6 medicinal leeches applied
to the soft tissue of the affected knee in
a single session. The animals were left
to feed ad libitum until they detached
themselves, on average 70 minutes later.
Patients in the control treatment were
given diclofenac gel and were told to
apply it twice daily to the affected area.
Pain was assessed by a questionnaire
given by personnel unaware of the
treatments applied to each patient. The
results showed that seven days after the
start of treatment, pain was significantly
lower in the leech group.
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