Comparison of acupuncture and other drugs for chronic constipation: A network meta-analysis

Bias propagation in network meta-analysis models

Network meta-analysis combines direct and indirect evidence to compare multiple treatments. As direct evidence for one treatment contrast may be indirect evidence for other treatment contrasts, biases in the direct evidence for one treatment contrast may affect not only the estimate for this particular treatment contrast but also estimates of other treatment contrasts. Because network structure determines how direct and indirect evidence are combined and weighted, the impact of biased evidence will be determined by the network geometry. Thus, this study's aim was to investigate how the impact of biased evidence spreads across the whole network and how the propagation of bias is influenced by the network structure. In addition to the popular Lu & Ades model, we also investigate bias propagation in the baseline model and arm-based model to compare the effects of bias in the different models. We undertook extensive simulations under different scenarios to explore how the impact of bias may be affected by the location of the bias, network geometry and the statistical model. Our results showed that the structure of a network has an important impact on how the bias spreads across the network, and this is especially true for the Lu & Ades model. The impact of bias is more likely to be diluted by other unbiased evidence in a well-connected network. We also used a real network meta-analysis to demonstrate how to use the new knowledge about bias propagation to explain questionable results from the original analysis.

Comparison of therapeutic effects of different acupuncture and moxibustion therapies on constipation after stroke treatment: A protocol for systematic review and network meta-analysis

BACKGROUND

Constipation is a common complication after stroke, which seriously affects patients' quality of life and recovery. Many evidences show that acupuncture and moxibustion therapy has advantages in the treatment of constipation after stroke. But different types of acupuncture and moxibustion have different effects, and there is no research to prove which one is more effective.

METHODS

According to the search strategy, we will retrieve the randomized controlled studies of acupuncture and moxibustion in the treatment of constipation after stroke from China Knowledge Network, Wanfang, VIP, China Biomedical medicine, PubMed, Embase, Web of Science, and The Cochrane Library databases. The retrieval time was from the establishment of the database to July 2021. Studies will be screened according to inclusion and exclusion criteria, and the quality of the studies will be assessed using the Cochrane Risk Bias Assessment Tool. All data analyses will be performed using Revman 5.4, Gemtc 0.14.3, and Stata 14.0. Finally, we will evaluate the strength of evidence using the Grading of Recommendations Assessment, Development, and Evaluation method.

RESULTS

In this study, the efficacy of different acupuncture and moxibustion therapies in the treatment of constipation after stroke will be evaluated by evaluating defecation frequency, stool property score, constipation symptom score, quality of life score, adverse reactions, etc.

CONCLUSIONS

This study will provide reliable evidence-based evidence for selecting the best acupuncture and moxibustion therapy for constipation after stroke.

The Quality of Methodological and Reporting in Network Meta-Analysis of Acupuncture and Moxibustion: A Cross-Sectional Survey

Background

Acupuncture had long been a primary treatment in the healthcare system of China. In recent years, there were more and more network meta-analyses (NMAs) in the field of acupuncture and moxibustion, but the quality evaluation of NMAs was rare.

Objectives

The goal of this study was to evaluate the methodological and reporting quality of NMAs and summarize the effects of different treatments of acupuncture and moxibustion.

Methods

PubMed, Embase, the Cochrane Library, China National Knowledge Infrastructure Database (CNKI), WanFang Database (WF), Chinese Scientific Journal Database (VIP), and Chinese Biomedical Literature Database (CBM) were searched from inception to January 2020 without any language restriction. In addition, the unpublished studies and the references of initially included literature were also retrieved manually. We included all relevant NMAs treated with acupuncture and moxibustion; other therapies such as traditional Chinese medicine and Western medicine may also be included, but at least three types fall under the category of acupuncture in each NMA. Outcome indicators were not limited. We selected AMSTAR2 and PRISMA-NMA to evaluate the methodological and reporting quality of eligible studies, respectively.

Results

In total, 29 NMAs were included finally, including 12 Chinese references and 17 English references. All eligible studies were published from May 2013 to August 2019. The number of interventions was between 4 and 22. The number of clinical trials included ranged from 10 to 121, with a total of 1098 clinical trials. The NMAs were involved in up to 23 diseases, knee osteoarthritis and primary dysmenorrhea covered with 3 NMAs separately, others focusing on chronic functional constipation, lumbar disc herniation, chronic fatigue syndrome, and the like. The Jadad scale and RoB scale were used as the bias risk assessment tools. Among them, 7 articles adopted the Jadad scale, 22 articles adopted the RoB scale (1 article adopted both the Jadad scale and RoB scale), and only 1 article did not mention the risk assessment tool. The AMSTAR2 methodological evaluation showed that the highest score was 13.5 points and the lowest was 4, with an average of 8.64 and a median of 9.5. According to the quality criteria, only one of them was in high quality, twenty-four were in medium quality, and four were in low quality. The PRISMA-NMA reporting quality evaluation showed that the highest score was 29 points and the lowest was 13.5, with an average of 23.62 and a median of 24.5; severe flaws also existed in some items, especially in "Structured summary," "Protocol and registration," "Search," "Data collection process," "Data items," "Additional analyses," "Risk of bias across studies," and "Results of additional analyses."

Conclusion

The number of NMAs in the field of acupuncture and moxibustion was still in the initial stage. Overall, their methodology and reports were of moderate quality. However, severe flaws also existed in some items. Because the eligible NMAs were limited, the conclusion needed further research to confirm its authenticity and reliability.

The effect of two types of minimal acupuncture on stooling, sleeping and feeding in infants with colic: secondary analysis of a multicentre RCT in Sweden (ACU-COL)

Background

Evidence for the effect of minimal acupuncture in infants with colic is limited.

Aim

To compare the effect of standardized minimal acupuncture, individualized acupuncture (where traditional acupuncture points were chosen according to the infant’s symptoms) and no acupuncture on objective measures of stooling, feeding and sleeping in infants with colic (based on diaries) and perceived changes in these parameters (based on parental questionnaires).

Methods

This was a secondary analysis of a multicentre randomized controlled three-armed trial conducted in four counties in Sweden between January 2013 and May 2015 (ACU-COL). The effect on crying has already been published and showed a decrease in crying time for the acupuncture groups. Infants, 2–8 weeks old, who cried and fussed for more than 3 h/day for more than 3 days/week, and thereby fulfilled the criteria for infantile colic, received four extra visits to their ordinary child health centre. The infants (n = 147) were randomly allocated via a computer-generated list to standardized minimal acupuncture at LI4 for 5 s (group A, n = 48), semi-standardized individual acupuncture with a maximum of five insertions for up to 30 s (group B, n = 49), or no acupuncture (group C, n = 48). The parents and the ordinary staff were blinded. Data were collected using: (1) diaries at baseline, during the two intervention weeks and 1-week follow-up; and (2) questionnaires with quantitative and qualitative components used at the second and fourth visits and during a follow-up telephone call. Outcomes were the changes in frequency of stooling and in hours of sleep per day.

Results

There were no differences between groups for stooling, feeding, or sleeping at any time point according to data from the diaries. At the follow-up phone call, more parents in groups A and B (compared to group C) perceived that feeding and sleep had changed and that the symptoms of colic had improved.