| Course | HW310 Complementary and Integrative Medicine |
|---|---|
| Unit | Unit 3 |
| Paper type | Evidence review |
| Length | About 1,190 words, 7 pages double-spaced |
| Format | APA 7 student paper |
| School | Purdue University Global |
| Program | BS in Health and Wellness |
| Updated | October 2026 |
Free sample paper for HW310 Unit 3
Better Than Usual Care, Closer to Sham: A Unit 3 Evidence Review of Acupuncture for Preventing Tension-Type Headache
[Student Name]
Purdue University Global
HW310: Complementary and Integrative Medicine
Unit 3 Evidence Review
[Instructor Name]
[Date]
The trials, the Cochrane review and their figures are real and reported from the published abstracts and reports; the interpretation is the writer's.
Summary
Acupuncture appears to reduce the frequency of tension-type headache in adults who have frequent episodes. Compared with routine care, the benefit is large; compared with sham acupuncture, it is small but statistically detectable. Moderate-quality evidence supports both findings. What the trials cannot tell us is how much of the benefit comes from needling at specific points and how much from the treatment ritual, the practitioner's attention and patients' expectations.
The Condition and the Question
Tension-type headache is the most common kind of headache, usually described as a pressing or tightening pain on both sides of the head without the nausea and light sensitivity of migraine. People with frequent episodes, or chronic tension-type headache on fifteen or more days a month, often seek treatment to prevent attacks rather than only to relieve them. Acupuncture is one of the most frequently used options.
The review question is narrow: in adults with frequent episodic or chronic tension-type headache, does a course of acupuncture reduce headache frequency compared with routine care and compared with sham acupuncture?
Sources
The review rests on one systematic review and three trials it includes.
1. Linde et al. (2016): a Cochrane review of 12 randomized trials with 2,349 participants, the most complete summary available. Outcome: the share of participants whose headache frequency fell by at least half after treatment. Certainty rated with the GRADE system.
2. Melchart et al. (2005): a German multicenter trial of 270 patients comparing acupuncture, minimal acupuncture at non-points with shallow needling, and a waiting list over eight weeks of treatment.
3. Endres et al. (2007): a German multicenter trial of 409 patients comparing acupuncture with sham acupuncture, with patients and outcome assessors blinded.
4. A large German pragmatic trial included in the Cochrane review, with 1,265 participants randomized to acupuncture or routine care.
Acupuncture Against Routine Care
Two trials compared acupuncture added to routine care, or to treatment of acute headaches only, with that care alone. In the larger trial, 48 percent of the acupuncture group saw their monthly headache days fall by half or more, compared with 19 percent in the control group; in the smaller trial the figures were 45 percent and 4 percent (Linde et al., 2016). The Cochrane authors rated this evidence as moderate in quality. The trials had a low risk of bias except for one feature: neither could be blinded. Patients knew whether they were receiving acupuncture, and those in the control groups knew they were receiving nothing new.
That difference matters. A comparison with routine care measures the total effect of being offered acupuncture, which includes the needles, the visits, the time with a practitioner, the expectation of help and the knowledge of being in the treated group. It answers a practical question, whether adding acupuncture helps, but not a mechanistic one.
Acupuncture Against Sham
Seven trials of moderate to high quality compared real acupuncture with a sham. Shams varied: needles placed at points not used in traditional acupuncture, shallow needling or non-penetrating devices. Pooling four trials, 51 percent of participants receiving acupuncture had at least a halving of headache frequency, compared with 43 percent receiving sham (Linde et al., 2016). Results six months after randomization were similar.
The individual trials show the same pattern. In the Melchart et al. (2005) trial, headache days fell by about seven days in the acupuncture group, about six and a half in the minimal acupuncture group and only one and a half on the waiting list; the difference between real and minimal acupuncture was not statistically significant. A sham-controlled German trial found that 33 percent of the real acupuncture group and 27 percent of the sham group met the primary definition of response (Endres et al., 2007), a gap that fell short of statistical significance, though real acupuncture did better on several secondary measures, including about two fewer headache days a month. Both groups improved substantially from where they started.
The shrinking gap is the finding of this review: most of what acupuncture achieves against routine care is also achieved by sham needling, and the part that remains specific to real acupuncture is real but modest.
What the Comparisons Mean Together
Read together, the two kinds of comparison answer different questions. The routine-care trials ask what happens when a person with frequent headaches is offered a course of acupuncture on top of their usual care, which is the question a client usually has in mind. The sham trials ask whether inserting needles at traditional points matters more than inserting them elsewhere or shallowly, which is the question a researcher or skeptic usually has in mind. Both answers are useful, and neither cancels the other.
Safety
Adverse effects were uncommon and minor in the trials that reported them. Across six trials, one of 420 participants receiving acupuncture withdrew because of an adverse effect, compared with none of 343 receiving sham (Linde et al., 2016). Bruising and brief pain at needle sites were the most common complaints.
Interpreting the Gap
Three explanations for the large gap between routine-care and sham comparisons can be offered, and the trials cannot separate them.
Expectation. Patients who receive any needling may expect improvement, and expectation alone can reduce the frequency of a pain condition that fluctuates naturally.
Attention and ritual. Acupuncture involves repeated visits, a calm setting, a practitioner's attention and time lying still. All are present in sham treatment, and any could reduce stress-related headache.
Imperfect shams. Shallow needling at non-points still involves skin penetration and may not be physiologically inert. If sham needling has some effect of its own, the comparison underestimates the specific effect of real acupuncture.
The Cochrane authors are careful here, describing the specific effect against sham as small and the overall effect in practice as potentially valuable (Linde et al., 2016). This review follows them. It would overstate the evidence to say acupuncture works only through placebo, and it would equally overstate it to say the benefit depends on traditional point selection.
Limits of This Review
The review relies on one systematic review and three trials, all from Europe and mostly from Germany, where acupuncture is widely offered by physicians and patients may hold different expectations than American clients do. Effects beyond six months were not studied. Outcomes were self-reported in headache diaries, which suits the condition but adds to the influence of expectation.
Conclusion
For adults with frequent tension-type headache, the evidence supports acupuncture as an option that is likely to help compared with no added treatment and carries few risks. The evidence does not support strong claims about how it works. A wellness professional discussing acupuncture with a client can say, accurately, that trials show meaningful improvement for many people and that much of the improvement also appears with sham needling.
References
Endres, H. G., Böwing, G., Diener, H.-C., Lange, S., Maier, C., Molsberger, A., Zenz, M., Vickers, A. J., & Tegenthoff, M. (2007). Acupuncture for tension-type headache: A multicentre, sham-controlled, patient- and observer-blinded, randomised trial. The Journal of Headache and Pain, 8(5), 306-314. https://doi.org/10.1007/s10194-007-0416-5
Linde, K., Allais, G., Brinkhaus, B., Fei, Y., Mehring, M., Shin, B.-C., Vickers, A., & White, A. R. (2016). Acupuncture for the prevention of tension-type headache. Cochrane Database of Systematic Reviews, 2016(4), Article CD007587. https://doi.org/10.1002/14651858.CD007587.pub2
Melchart, D., Streng, A., Hoppe, A., Brinkhaus, B., Witt, C., Wagenpfeil, S., Pfaffenrath, V., Hammes, M., Hummelsberger, J., Irnich, D., Weidenhammer, W., Willich, S. N., & Linde, K. (2005). Acupuncture in patients with tension-type headache: Randomised controlled trial. BMJ, 331(7513), 376-382. https://doi.org/10.1136/bmj.38512.405440.8F
What the HW310 Unit 3 assignment asks for
The evidence review unit asks students to locate the strongest research on one modality for one condition and to explain what it shows. Prompts generally expect a clear question, a description of the sources, findings grouped by comparison, a judgment of certainty and a conclusion that does not exceed the evidence. Use a recent systematic review as the anchor and add the key trials it draws on. Group results by what the treatment was compared with, since a comparison with doing nothing answers a different question from a comparison with sham. Quote the certainty ratings the review authors assigned rather than inventing your own. Report adverse effects. A one-paragraph summary at the start helps readers. Most reviews in this course run four to six pages.
How the HW 310 Unit 3 example is put together
A summary paragraph states the conclusion first. Short sections define the condition and the review question, then list four sources with their designs and sizes. Routine-care results come next, with response rates from both trials and a note that neither could be blinded. Sham results follow, pooled first and then trial by trial. The highlighted sentence names the shrinking gap as the finding. A short section explains what each kind of comparison is for, and safety figures follow. The interpretation section offers three explanations, expectation, attention and imperfect shams, and declines to choose among them. Limits name the German setting and self-reported diaries, and the conclusion gives a sentence a wellness professional could say to a client.
Where the points sit in the HW310 Unit 3 rubric
HW310 evidence review rubrics typically place most points on analysis: whether findings are grouped meaningfully, whether certainty is judged accurately and whether the conclusion stays within the evidence. Source quality is a separate criterion, with systematic reviews and large trials preferred over single small studies. Accurate reporting of numbers, with the comparison named each time, earns points under accuracy. Discussion of limitations and alternative explanations often decides whether a paper reaches the top band. Organization, including a summary that states the conclusion, is scored under communication. APA formatting and citation of every figure complete the rubric. Reviews that report only the favorable comparison, or that turn a modest sham difference into proof, generally lose points on analysis.
HW310 Unit 3 help: mistakes that cost points
Students reviewing acupuncture research often report one striking number without saying what it was compared with, which misleads readers. Another weakness is summarizing studies one after another without ever stating what they mean together. Some papers dismiss every positive result as placebo, which overstates the evidence as much as uncritical enthusiasm does. Certainty ratings are often invented rather than quoted from the review. Safety data are frequently left out. Many reviews also skip limitations about where the trials were done. If you have found a systematic review but are unsure how to organize its findings, pass it along with your prompt, and a writer will sort its trials by what each one was compared against.
Get an HW310 Unit 3 example written to your instructions
Which modality and which condition did the Unit 3 assignment pair? Send both, plus any sources your instructor has already supplied and the rubric. An open choice of condition is fine; the review then explains its pick. It is organized by comparison type, carries its certainty ratings with attribution, and comes back inside 24-48h, the first one without charge. The paper above is an original model document written by our desk, not a submitted student paper and not an official Purdue University Global document.
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HW310 Unit 3 questions, answered
How many sources does an evidence review need?
Enough to represent the evidence honestly, which is a question of coverage rather than count. One recent systematic review plus several key trials it includes, or that appeared after it, often suffices when the prompt sets no number. Where the prompt does set a number, meet it, and explain in the methods paragraph how those particular sources were chosen.
What if the evidence for my modality is almost nonexistent?
Then that is the finding, and it can carry a strong review. Describe what was searched, what turned up, and why the available studies cannot support a conclusion, whether because of size, design or a lack of controls. Instructors in this course generally credit an honest report of thin evidence well above a paper stretching two small studies into a recommendation.
Do I need to explain statistics such as effect sizes?
Only as far as the prompt and the sources require. Reporting that a review found a small difference on a pain scale, and what the authors judged that difference to mean for patients, is usually enough. Recalculating anything is rarely expected. What matters is that each number cited comes with its source and a plain statement of what it measures.
Where can I find a free HW310 Unit 3 sample paper?
This page holds a complete Unit 3 evidence review of acupuncture for tension-type headache, with comparisons, certainty ratings, margin notes and APA references.
Why does acupuncture look better against routine care than against sham?
Patients in routine-care trials know they received nothing new, so the comparison includes expectation, attention and ritual. Sham needling shares those features, leaving only the effect specific to real acupuncture.