1.1 Migraine and acupuncture, Part I. A migraine is a particularly painful type of headache, which patients sometimes wish to treat with acupuncture. To determine whether acupuncture relieves migraine pain, researchers conducted a randomized controlled study where 89 females diagnosed with migraine headaches were randomly assigned to one of two groups: treatment or control. 43 patients in the treatment group received acupuncture that is specifically designed to treat migraines. 46 patients in the control group received placebo acupuncture (needle insertion at non-acupoint locations). 24 hours after patients received acupuncture, they were asked if they were pain free. Results are summarized in the contingency table below.² Group Treatment Control Total Pain free Yes No 10 33 44 Total 43 2 46 12 77 89 M Figure from the original pa- per displaying the appropri- ate area (M) versus the in- appropriate area (S) used in the treatment of migraine at- tacks. (a) What percent of patients in the treatment group were pain free 24 hours after receiving acupuncture? (b) What percent were pain free in the control group? (c) In which group did a higher percent of patients become pain free 24 hours after receiving acupuncture? ffootivo treatment for migraines for all people
1.1 Migraine and acupuncture, Part I. A migraine is a particularly painful type of headache, which patients sometimes wish to treat with acupuncture. To determine whether acupuncture relieves migraine pain, researchers conducted a randomized controlled study where 89 females diagnosed with migraine headaches were randomly assigned to one of two groups: treatment or control. 43 patients in the treatment group received acupuncture that is specifically designed to treat migraines. 46 patients in the control group received placebo acupuncture (needle insertion at non-acupoint locations). 24 hours after patients received acupuncture, they were asked if they were pain free. Results are summarized in the contingency table below.² Group Treatment Control Total Pain free Yes No 10 33 44 Total 43 2 46 12 77 89 M Figure from the original pa- per displaying the appropri- ate area (M) versus the in- appropriate area (S) used in the treatment of migraine at- tacks. (a) What percent of patients in the treatment group were pain free 24 hours after receiving acupuncture? (b) What percent were pain free in the control group? (c) In which group did a higher percent of patients become pain free 24 hours after receiving acupuncture? ffootivo treatment for migraines for all people
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Transcribed Image Text:1.1 Migraine and acupuncture, Part I. A migraine is a particularly painful type of headache, which patients
sometimes wish to treat with acupuncture. To determine whether acupuncture relieves migraine pain,
researchers conducted a randomized controlled study where 89 females diagnosed with migraine headaches
were randomly assigned to one of two groups: treatment or control. 43 patients in the treatment group
received acupuncture that is specifically designed to treat migraines. 46 patients in the control group
received placebo acupuncture (needle insertion at non-acupoint locations). 24 hours after patients received
acupuncture, they were asked if they were pain free. Results are summarized in the contingency table below.²
Group
Treatment
Control
Total
Pain free
Yes No Total
10 33 43
2
44
46
12 77
89
M
Figure from the original pa-
per displaying the appropri-
ate area (M) versus the in-
appropriate area (S) used in
the treatment of migraine at-
tacks.
(a) What percent of patients in the treatment group were pain free 24 hours after receiving acupuncture?
(b) What percent were pain free in the control group?
(c) In which group did a higher percent of patients become pain free 24 hours after receiving acupuncture?
(d) Your findings so far might suggest that acupuncture is an effective treatment for migraines for all people
who suffer from migraines. However this is not the only possible conclusion that can be drawn based
on your findings so far. What is one other possible explanation for the observed difference between the
percentages of patients that are pain free 24 hours after receiving acupuncture in the two groups?
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