According to its authors, this RCT was aimed at investigating the 1) specific effect of individualized homeopathic Q-potencies compared to placebo and 2) the effect of an extensive homeopathic case taking (case history I) compared to a shorter, rather conventional one (case history II) in the treatment of acute major depression. In particular the second research question is intriguing, I think – so let’s have a closer look at this trial.
The study was designed as a randomized, partially double-blind, placebo-controlled, four-armed, 2×2 factorial trial with a 6-week study duration. A total of 44 patients were randomized (2∶1∶2∶1 randomization: 16 homeopathic Q-potencies/case history I, 7 placebo/case history I, 14 homeopathic Q-potencies/case history II, 7 placebo/case history II). Because of recruitment problems, the study was terminated prior to full recruitment, and was thus underpowered for the pre-planned confirmatory hypothesis testing. Exploratory data analyses showed heterogeneous and inconclusive results with large variance. The mean difference for the Hamilton-D after 6 weeks was 2.0 (95%CI -1.2;5.2) for Q-potencies vs. placebo, and -3.1 (-5.9;-0.2) for case history I vs. case history II. Overall, no consistent or clinically relevant results between homeopathic Q-potencies versus placebo and homeopathic versus conventional case taking were observed. The frequency of adverse events was comparable for all groups.
The conclusions were remarkable: although our results are inconclusive, given that recruitment into this trial was very difficult and we had to terminate early, we cannot recommend undertaking a further trial addressing this question in a similar setting.
Alright, the authors encountered problems in recruiting enough patients and they therefore decided to stop the trial early. This sort of thing happens. Most researchers would then not publish any data at all. This team, however, did publish a report, and the decision to do so might be perfectly fine: other investigators might learn from the problems which led to early termination of the study.
But why do they conclude that the results were INCONCLUSIVE? I think the results were not inconclusive but non-existent; these were no results to report other than those related to the recruitment problems. And even if one insists on presenting outcome data as an exploratory analysis, one cannot honestly say they were INCONCLUSIVE, all one might state in this case is that the results failed to show an effect of the remedy or the consultation. This is far less favourable for homeopathy than stating the results were INCONCLUSIVE.
And why on earth do the authors conclude “we cannot recommend undertaking a further trial addressing this question in a similar setting”? This does not make the slightest sense to me. If the trialists encountered recruitment problems, others might find ways of overcoming them. The research question asking whether the effects of an extensive homeopathic case taking differ from those of a shorter conventional one seems important. If answered accurately, it could disentangle much of the confusion that surrounds clinical trials of homeopathy.
I have repeatedly commented on the odd conclusions drawn by proponents of alternative medicine on the basis of data that did not quite fulfil their expectations, and I often ask myself at what point this ‘prettification’ of the results via false positive conclusions crosses the line to scientific misconduct. My theory is that these conclusions appear odd to those capable of critical analysis because the authors bend over backwards in order to conclude more positively than the data would seem to permit. If we see it this way, such conclusions might even prove useful as a fairly sensitive ‘bullshit-detector’.
Acupressure is a treatment-variation of acupuncture; instead of sticking needles into the skin, pressure is applied over ‘acupuncture points’ which is supposed to provide a stimulus similar to needling. Therefore the effects of both treatments should theoretically be similar.
Acupressure could have several advantages over acupuncture:
- it can be used for self-treatment
- it is suitable for people with needle-phobia
- it is painless
- it is not invasive
- it has less risks
- it could be cheaper
But is acupressure really effective? What do the trial data tell us? Our own systematic review concluded that the effectiveness of acupressure is currently not well documented for any condition. But now there is a new study which might change this negative verdict.
The primary objective of this 3-armed RCT was to assess the effectiveness and cost-effectiveness of self-acupressure using wristbands compared with sham acupressure wristbands and standard care alone in the management of chemotherapy-induced nausea. 500 patients from outpatient chemotherapy clinics in three regions in the UK involving 14 different cancer units/centres were randomised to the wristband arm, the sham wristband arm and the standard care only arm. Participants were chemotherapy-naive cancer patients receiving chemotherapy of low, moderate and high emetogenic risk. The experimental group were given acupressure wristbands pressing the P6 point (anterior surface of the forearm). The Rhodes Index for Nausea/Vomiting, the Multinational Association of Supportive Care in Cancer (MASCC) Antiemesis Tool and the Functional Assessment of Cancer Therapy General (FACT-G) served as outcome measures. At baseline, participants completed measures of anxiety/depression, nausea/vomiting expectation and expectations from using the wristbands.
Data were available for 361 participants for the primary outcome. The primary outcome analysis (nausea in cycle 1) revealed no statistically significant differences between the three arms. The median nausea experience in patients using wristbands (both real and sham ones) was somewhat lower than that in the anti-emetics only group (median nausea experience scores for the four cycles: standard care arm 1.43, 1.71, 1.14, 1.14; sham acupressure arm 0.57, 0.71, 0.71, 0.43; acupressure arm 1.00, 0.93, 0.43, 0). Women responded more favourably to the use of sham acupressure wristbands than men (odds ratio 0.35 for men and 2.02 for women in the sham acupressure group; 1.27 for men and 1.17 for women in the acupressure group). No significant differences were detected in relation to vomiting outcomes, anxiety and quality of life. Some transient adverse effects were reported, including tightness in the area of the wristbands, feeling uncomfortable when wearing them and minor swelling in the wristband area (n = 6). There were no statistically significant differences in the costs associated with the use of real acupressure band.
26 subjects took part in qualitative interviews. Participants perceived the wristbands (both real and sham) as effective and helpful in managing their nausea during chemotherapy.
The authors concluded that there were no statistically significant differences between the three arms in terms of nausea, vomiting and quality of life, although apparent resource use was less in both the real acupressure arm and the sham acupressure arm compared with standard care only; therefore; no clear conclusions can be drawn about the use of acupressure wristbands in the management of chemotherapy-related nausea and vomiting. However, the study provided encouraging evidence in relation to an improved nausea experience and some indications of possible cost savings to warrant further consideration of acupressure both in practice and in further clinical trials.
I could argue about several of the methodological details of this study. But I resist the temptation in order to focus on just one single point which I find important and which has implications beyond the realm of acupressure.
Why on earth do the authors conclude that no clear conclusions can be drawn about the use of acupressure wristbands in the management of chemotherapy-related nausea and vomiting? The stated aim of this RCT was to assess the effectiveness and cost-effectiveness of self-acupressure using wristbands compared with sham acupressure wristbands and standard care. The results failed to show significant differences of the primary outcome measures, consequently the conclusion cannot be “unclear”, it has to be that ACUPRESSURE WRIST BANDS ARE NOT MORE EFFECTIVE THAN SHAM ACUPRESSURE WRIST BANDS AS AN ADJUNCT TO ANTI-EMETIC DRUG TREATMENT (or something to that extent).
As long as RCTs of alternative therapies are run by evangelic believers in the respective therapy, we are bound to regularly encounter this lamentable phenomenon of white-washing negative findings with an inadequate conclusion. In my view, this is not research or science, it is pseudo-research or pseudo-science. And it is much more than a nuisance or a trivial matter; it is a waste of research funds, a waste of patients’ good will that has reached a point where people will lose trust in alternative medicine research. Someone should really do a systematic study to identify those research teams that regularly commit such scientific misconduct and ensure that they are cut off public funding and support.