Guidelines for Cancer-Related Pain: A Systematic Review of Complementary and Alternative Medicine Recommendations

A Qualitative Study of the Pain Experience of Black Individuals With Cancer Taking Long-Acting Opioids

BACKGROUND

Little is known about the experience of Black individuals with cancer taking long-acting opioids for cancer pain.

OBJECTIVE

This study aimed to describe the day-to-day experience of living with pain and the experiences of taking opioids for pain management among Black individuals with cancer prescribed with long-acting opioids.

METHODS

This qualitative descriptive study was part of a larger investigation focused on opioid adherence. Participants (N = 14) were interviewed using a semistructured interview guide. Analysis followed conventional content analysis and constant comparison approaches. Sociodemographics, clinical information, and the Brief Pain Inventory form were collected.

RESULTS

The majority of the subsample was female (64.3%), not married (78.6%), and with a median age of 52.5 years. Participants were taking either MS Contin (85.7%) or OxyContin (14.3%). The Brief Pain Inventory median "average" pain severity scores and pain interference scores were 5.1/10 (interquartile range [IQR] = 6.1) and 3.5/10 (IQR = 6.7), respectively. Three themes are reported from the analyses: desire for control, barriers to pain relief, and isolation versus connectedness.

CONCLUSION

Our findings highlight the persistent nature of moderate to severe cancer pain and how pain and its treatment interfere with patients' lives. The findings describe ways that patients learn to manage and exert control over pain despite conflicting attitudes and dealing with opioid stigma.

IMPLICATION FOR PRACTICE

Clinicians should partner with patients with cancer, especially people of color, who may experience intersecting stigmas related to their cancer pain and opioid use, to best provide an individualized and culturally sensitive pain treatment plan.

Transcutaneous electrical acupoint stimulation for cancer-related pain management in patients receiving chronic opioid therapy: a randomized clinical trial

PURPOSE

The opioid crisis resulting from its use disorder and overdose poses additional challenges for cancer pain management. The American Society of Clinical Oncology Practice Guideline recommends acupuncture therapy for the management of adult cancer-related pain (CRP), but the effectiveness of transcutaneous electrical acupoint stimulation (TEAS) on CRP remains uncertain.

METHODS

This 5-week prospective randomized clinical trial was conducted at 2 hospitals in China, and participants with CRP receiving chronic opioid therapy were randomized 1:1 into two groups between December 2014 and June 2018. The true TEAS group underwent 15 sessions of TEAS treatments over 3 consecutive weeks, while the control group received sham stimulation. The primary outcome was the numerical rating scale (NRS) score in the past 24h at week 3. The secondary outcomes included morphine equivalent daily dose, quality of life and adverse events.

RESULTS

A total of 159 participants were included in the modified intention-to-treat population. The baseline characteristics were similar in both groups. The mean NRS scores were 0.98 points at week 3 in the true TEAS group and 1.41 points in the sham group, with the mean difference between groups of -0.43 points (P < 0.001; OR = 0.68, P < 0.05). The proportion of patients with NRS reduction more than thirty percentage at week 3 was 50.00% in the true TEAS group and 35.44% in the sham group (RD = 0.15, P > 0.05; RR = 1.41, P > 0.05). No significant difference in pain intensity between the two groups was observed during the follow-up period without TEAS intervention (week 4, OR = 0.83, P > 0.05; week 5, OR = 0.83, P > 0.05). The Karnofsky Performance Status value suggested that patients in the true TEAS group experienced an improved quality of life (Between-group differences: week 3, 3.5%, P < 0.05; week 4, 4.6%, P < 0.001; week 5, 5.6%, P < 0.001).

CONCLUSIONS

The 3-week application of TEAS in patients with CRP receiving chronic opioid therapy resulted in a statistically significant reduction in pain scores, but the observed reduction was of uncertain clinical significance. The prolonged analgesic effect of TEAS was not confirmed in this trial.

CLINICALTRIAL

GOV: ChiCTR-TRC-13003803.

Race, Ethnicity, and Sustained Opioid Use After Major Abdominal Surgery for Cancer

Purpose

Sustained opioid use is a well-known complication after surgery. Our objective was to determine whether there is any association between a patient's race or ethnicity and the sustained use of opioids in the year following surgery. Opioid use over the initial 3, 6, and 12 postoperative months was categorized as "sustained early", persistent, and chronic, respectively.

Patients and Methods

Single-institution retrospective study of adults (≥18 years) who had undergone open abdominal surgery for cancer. Multivariable logistic regression was used to evaluate the association between race/ethnicity and opioid use.

Results

Of the 3523 patients included in the study, 2543 (72.2%) were non-Hispanic (NH) White, 476 (13.5%) were Hispanic or Latino, 262 (7.4%) were NH-Black, 186 (5.3%) were Asian, and 56 (1.6%) belonged to other racial or ethnic groups. The overall rates of sustained early, persistent, and chronic opioid use were 15.9%, 7.1%, and 2.6%, respectively. In the multivariable analysis, patient race/ethnicity was associated with sustained early postoperative opioid use (p-value=0.037), with Hispanics/Latinos having significantly higher odds than NH-Whites (OR = 1.382 [95% CI: 1.057-1.808]; p = 0.018). However, neither persistent nor chronic opioid use was associated with race/ethnicity (p = 0.697 and p = 0.443, respectively).

Conclusion

In this retrospective study of adults who had undergone open abdominal surgery, patient race/ethnicity was not consistently associated with the development of sustained opioid use over the first 12 postoperative months.

Effect of Fu's subcutaneous needling for cancer pain management: protocol for a pragmatic randomised controlled trial

INTRODUCTION

Pain is a common symptom in patients with cancer, and pain management is crucial for these patients. Fu's subcutaneous needling (FSN) is a modern acupuncture therapy based on basic medicine commonly used in patients with pain. However, evidence of its effectiveness in treating cancer pain has not been systematically proven. Therefore, this pragmatic randomised controlled trial aims to evaluate the effectiveness and safety of FSN for cancer pain management.

METHODS AND ANALYSIS

Overall, 120 eligible patients will be recruited and randomly assigned into two groups using block randomisation. Both groups will be administered analgesic drugs according to the National Comprehensive Cancer Network guidelines. The treatment group will receive FSN therapy one time a day for 6 days. Additionally, we will assess analgesic consumption as the primary outcome and the Numerical Rating Scale, outbreak pain, symptom assessment and adverse events as secondary outcomes to evaluate the effect and safety of FSN in treating cancer pain. The incidence of adverse events will be monitored to assess the safety of FSN.

ETHICS AND DISSEMINATION

Ethics approval was obtained from the Ethics Committee of the First Affiliated Hospital of Guangzhou University of Chinese Medicine (approval No: K(2021)096). The results will be published in a peer-reviewed journal, and trial participants will be informed via email and/or phone calls.

TRIAL REGISTRATION NUMBER

ChiCTR2200056348.

Complementary and alternative medicine mention and recommendations in pancreatic cancer clinical practice guidelines: A systematic review and quality assessment

Background

Pancreatic cancer is the third leading cause of cancer death in the United States, which is attributed to limited treatment options. Complementary and alternative medicine (CAM) therapies have been proposed to provide benefits in treating pancreatic cancer. Despite its importance in treatment, clinicians are not generally well equipped to counsel their patients about CAM therapies. This review identified the quantity and assessed the quality of clinical practice guidelines (CPGs) providing CAM recommendations for the treatment and/or management of pancreatic cancer.

Methods

A systematic review was conducted to identify pancreatic cancer CPGs. MEDLINE, EMBASE and CINAHL were searched from 2011 to 2022. The Guidelines International Network (GIN) and the National Center for Complementary and Integrative Health (NCCIH) websites were also searched. Eligible CPGs published by non-profit agencies on treatment and/or management of pancreatic cancer for adults were assessed using the Appraisal of Guidelines, Research and Evaluation II (AGREE II) instrument.

Results

From 31 eligible search results, 7 CPGs mentioned CAM and 3 CPGs made CAM recommendations. The mean scaled domain percentages of the CPGs in this study (overall, CAM-specific) were as follows: scope and purpose (81.3%, 77.8%), stakeholder involvement (63.9%, 42.6%), rigor-of-development (51.0%, 40.3%), clarity-of-presentation (83.3%, 54.6%), applicability (42.3%, 30.5%), and editorial independence (58.3%, 58.3%).

Conclusions

Evaluation of the CPGs demonstrated that quality varied both within and between CPGs. CPGs that scored well could be used by patients and clinicians as the basis for discussion for the use of CAM therapies. Future research should identify other appropriate CAM therapies for further development of CPGs for pancreatic cancer.

Registration

The protocol was registered on PROSPERO (registration number: CRD42022334025).

Neck pain clinical practice guidelines: a systematic review of the quality and quantity of complementary and alternative medicine recommendations

BACKGROUND

Individuals with neck pain frequently turn to complementary and alternative medicine (CAM) to seek relief. However, conventional healthcare providers often lack adequate CAM therapy knowledge to deliver informed recommendations to patients. The purpose of this study was to identify mention of CAM in neck pain clinical practice guidelines (CPG) and assess the quality of CAM recommendations using the Appraisal of Guidelines for Research & Evaluation II (AGREE II) instrument.

METHODS

MEDLINE, EMBASE and CINAHL were systematically searched from 2009 to 2020 in addition to the Guidelines International Network and National Center for Complementary and Integrative Health websites. Eligible CPGs providing CAM recommendations were assessed twice with the AGREE II instrument, once to assess the overall CPG and then once to assess the CAM sections specifically.

RESULTS

From 643 unique search results, 15 CPGs on the treatment and/or management of neck pain were identified, and 8 made recommendations on CAM therapy. Regarding scaled domain percentages, the overall CPG scored higher than the CAM section for 5 of 6 domains (overall, CAM): (1) scope and purpose (93.4%, 93.1%), (2) stakeholder involvement (81.6%, 81.9%), (3) rigour of development (70.8%, 66.3%), (4) clarity of presentation (64.9%, 60.8%), (5) applicability (39.3%, 33.6%), and (6) editorial independence (47.9%, 45.3%).

CONCLUSIONS

Most neck pain CPGs made CAM recommendations. The quality of CAM recommendations is lower than overall recommendations across all domains with the exception of stakeholder involvement. This disparity highlights the need for CAM recommendations quality improvement. Although many patients with neck pain seek CAM therapies, few CPGs are available for healthcare providers and patients.

Quality assessment of clinical practice guidelines on psychological distress of cancer patients using the AGREE II instrument

Objective

This study aimed to assess the quality of the clinical practice guidelines on psychological distress among cancer patients and provide users with recommendations for coping with psychological distress.

Methods

A systematic search of relevant clinical practice guidelines was undertaken to identify and select the clinical practice guidelines related to psychological distress among cancer patients. Literature databases were searched in PubMed, Web of Science, Excerpta Medica Database, the Cumulative Index to Nursing & Allied Health Literature, China Biology Medicine, China National Knowledge Infrastructure, WanFang and Weipu Journal Database. The guideline databases include Yimaitong Guidelines Network, National Guideline Clearinghouse, National Institute for Health and Clinical Excellence, American Society of Clinical Oncology (ASCO), New Zealand Guidelines Group, Scottish Intercollegiate GuidelinesNetwork, American Psychological Association, Registered Nurses' Association of Ontario and Cancer Care Ontario (CCO). Four independent reviewers assessed the eligible guidelines using the Appraisal of Guidelines for Research and Evaluation (AGREE II) instrument.

Results

Six clinical practice guidelines were included and assessed for critical evaluation. The median score for the scope and purpose domain was 71.5% (IQR 64%-77.25%), the stakeholder involvement domain was 65% (IQR 47.5%-74.5%), the rigour of the development domain was 61.5% (IQR 45.5%-85.25%), the clarity of the presentation domain was 91% (IQR 72.25%-94.5%), the applicability domain was 70% (IQR 33%-78.75%), and the editorial independence domain was 48.84% (IQR 61.75%-95%). Four guidelines (ASCO, 2014; Canadian Association of Psychosocial Oncology, 2015; NCCN, 2020, and CCO, 2016) were classified as "recommended," and the remaining (European Palliative Care Research Collaborative and Chinese Psychosocial Oncology Society) were "recommended with modifications," especially in the domains of Stakeholder involvement, rigour of development, and applicability. The inter-rater consistency of each domain showed moderate level (0.52-0.90) analyzing by intraclass correlation.

Conclusions

The clinical practice guidelines on psychological distress among cancer patients varied in quality, and there were discrepancies in terms of the recommendations and recommendation grades. These findings could contribute to improving the quality of clinical practice guidelines on psychological distress, and enable the development and implementation of evidence-based guidelines for cancer patients.

Systematic Review Registration

https://www.crd.york.ac.uk/PROSPERO, identifier CRD42020209204.

The Provision of Complementary, Alternative, and Integrative Medicine Information and Services: a Review of World Leading Oncology Hospital Websites

BACKGROUND

Many cancer patients use complementary, alternative, and integrative medicine (CAIM) to improve their psychological and functional health. However, there is little known about the extent of CAIM information and services provided on oncology hospital websites.

METHODS

This study reviewed public-facing websites to determine the degree of CAIM information provided and services offered by the world's leading cancer hospitals in 2021; this ranking was informed by a large survey of medical professionals led by Newsweek and Statista. Nine authors extracted data from hospital websites individually and in triplicate, prior to meeting to revise data extractions. Data analysis was then performed by two authors to determine how many hospitals provided CAIM descriptions and offered CAIM services, and the extent of CAIM information provided.

RESULTS

A total of 131 hospitals were included in this study. Of the eligible hospitals, 50.38% (n = 66) provided a theoretical description of CAIM; 48.09% (n = 63) provided a description of one or more CAIM therapies; 63.36% (n = 83) offered one or more CAIM therapies to cancer patients. The most common therapies described were the same as the most common therapies offered. These therapies are massage, special foods and diets, acupuncture, meditation, yoga, and creative outlets. While CAIM therapies were commonly offered, information surrounding the benefits and side effects associated with these therapies varied.

CONCLUSIONS

Due to the lack of CAIM standardization worldwide, there is a need for increased CAIM information provision on hospital websites to better inform and empower patients to make well-informed decisions about their health.

Use of complementary and integrative health in cancer pain management among patients undergoing cancer treatments: a qualitative descriptive study

BACKGROUND

Pain is a common symptom in patients undergoing cancer treatment. Despite recommendations for the stronger integration of complementary and integrative health (CIH) in cancer pain management, little is known about the individual experience of using this approach for cancer pain, particularly in certain populations such as African Americans.

OBJECTIVE

This study aimed to describe the experiences of using CIH for pain in African American and White patients with cancer undergoing cancer treatments.

METHODS

A secondary analysis of qualitative descriptive data from a subsample of patients with cancer in a parent study of their illness concerns was employed. Atlas.ti 8.0 was used for data management and qualitative analysis. Counts of participant-endorsed themes were tabulated to discern differences in themes by group.

RESULTS

Of 32 participants (16 African American, 16 White), 22 reported CIH usage for cancer pain management, with equal distribution between groups (11 each). Three themes emerged: Approach to, Reasons for, and Barriers to CIH Use. Psychological approaches were most common (n = 15). Nutritional, physical, and combination approaches were less common and more often employed by White participants. Reasons for CIH use were to reduce opioid consumption or for an opioid adjuvant. Personal limitations and access issues contributed to Barriers to CIH use.

CONCLUSIONS

Both African American and White patients used CIH for pain management while undergoing cancer treatments. However, some preferential differences in CIH approaches by race surfaced. Further research into these differences may uncover new ways of addressing disparities in cancer pain management with CIH.

The effects of foot reflexology on pain and physiological indicators in children with leukemia under chemotherapy: a clinical trial study

BACKGROUND

Foot reflexology is a popular complementary medicine method; however, previous studies have shown conflicting results. This study aimed to investigate the impact of foot reflexology on pain and physiological responses caused by intrathecal injection of chemotherapy drugs in children with leukemia.

MATERIALS AND METHODS

This clinical trial included 80 children with leukemia. The participants received 20 min foot reflexology (10 min each foot). The primary measured outcomes included pain and physiological indicators (blood pressure and heart rate).

RESULTS

The results showed that foot reflexology had a significant effect on reducing pain (p = 0.002) and improving physiological indicators [blood pressure (p = 0.002) and heart rate (p = 0.003)].

CONCLUSION

Based on the results of the present study, which shows the positive effect of foot reflexology on the improvement of pain and physiological indicators, foot reflexology can be used as a complementary treatment along with conventional therapies.

What traditional, complementary, and integrative medicine recommendations exist across osteoporosis clinical practice guidelines? A systematic review and quality assessment

Background

Traditional, complementary and integrative medicine (TCIM) is sought by more than 50% of patients with osteoporosis. Despite this, many healthcare providers lack the knowledge to adequately counsel patients on safe and effective TCIM use. The purpose of this study was to determine the quantity and quality of TCIM recommendations in clinical practice guidelines (CPGs) for the treatment and/or management of osteoporosis.

Methods

MEDLINE, EMBASE and CINAHL databases, in addition to the Guidelines International Network, and the National Center for Complementary and Integrative Health website were searched from 2009–2020. CPGs making TCIM recommendations for the treatment/management of osteoporosis were assessed with the AGREE II instrument.

Results

Of 536 unique search results, 27 osteoporosis CPGs made mention of TCIM therapies. From highest to lowest, scaled domain percentages of all eligible CPGs averaged to 92.59% for scope and purpose, 88.79% for clarity in presentation, 55.04% for stakeholder involvement, 47.84% for editorial independence, 46.53% for rigor of development, and 36.96% for applicability. Of the 27 CPGs assessed, 4 CPGs were recommended as is by both appraisers, while 23 CPGs were recommended with modifications.

Conclusions

Recommendations pertaining to calcium and vitamin D supplementation and exercise were favorably recommended across nearly all CPGs. In the case of other TCIM interventions, recommendations varied greatly, which may present challenges for CPGs target users due to a lack of consistency. Given the varying quality of osteoporosis CPGs found, those requiring improvement may benefit from their guideline development panel utilizing the AGREE II instrument to inform future updates.

Headache and migraine clinical practice guidelines: a systematic review and assessment of complementary and alternative medicine recommendations

BACKGROUND

Globally, 3 billion people suffer from either migraine or tension-type headache disorder over their lifetime. Approximately 50% of American adults suffering from headache or migraine have used complementary and alternative medicine (CAM), however, the quality and quantity of recommendations associated with such therapies across clinical practice guidelines (CPGs) for the treatment and/or management of these conditions are unknown. The purpose of this study was to identify the quantity and assess the quality of such CAM recommendations.

METHODS

MEDLINE, EMBASE and CINAHL were systematically searched from 2009 to April 2020; the Guidelines International Network and the National Center for Complementary and Integrative Health websites were also searched for eligible CPGs. CPGs were included if they provided any therapy recommendations. Eligible CPGs included those written for adult patients with headache and migraine; CPGs containing CAM recommendations were assessed twice for quality using the AGREE II instrument, once for the overall CPG and once for the CAM sections.

RESULTS

Of 486 unique search results, 21 CPGs were eligible and quality assessed; fifteen CPGs mentioned CAM, of which 13 CPGs made CAM recommendations. The overall CPG assessment yielded higher scaled domain percentages than the CAM section across all domains. The results from highest to lowest were as follows (overall, CAM): clarity of presentation (66.7% vs. 50.0%), scope and purpose (63.9% vs. 61.1%), stakeholder involvement (22.2% vs. 13.9%), rigour of development (13.5% vs. 9.4%), applicability (6.3% vs. 0.0%), and editorial independence (0.0% vs. 0.0%).

CONCLUSIONS

Of the eligible CPGs, the CAM sections were of lower quality compared to the overall recommendations across all domains of the AGREE II instrument. CPGs that scored well could serve as a framework for discussion between patients and healthcare professionals regarding use of CAM therapies in the context of headache and migraine.

A Systematic Review and Quality Assessment of Breast Cancer Clinical Practice Guidelines Providing Complementary and Alternative Medicine Recommendations

PURPOSE OF REVIEW

Up to 80% of patients with breast cancer are reported to use complementary and alternative medicine (CAM). Despite this high prevalence, many healthcare providers have little knowledge and education surrounding this topic and may be inadequately prepared to discuss such therapies with their patients. Given this knowledge gap, the purpose of this study was to systematically identify the quantity and assess the quality of CAM recommendations in clinical practice guidelines (CPGs) for the treatment and/or management of breast cancer.

RECENT FINDINGS

Thirty-four CPGs were deemed eligible, 5 of which mentioned CAM, and 4 of which made CAM recommendations. Eligible CPGs containing CAM recommendations were assessed with the AGREE II instrument. Scaled domain percentages from highest to lowest were (% overall, % CAM) as follows: scope and purpose (100.0%, 100.0%), editorial independence (100.0%, 100.0%), clarity of presentation (97.2%, 80.6%), rigour of development (80.2%, 80.2%), stakeholder involvement (88.9%, 77.8%), and applicability (58.3%, 58.3%). CPGs with favourable scores may provide practitioners with guidance on safe and effective use of CAM therapies. A need exists to improve the quality of CAM recommendations in CPGs.

The Presence of Complementary and Alternative Medicine Recommendations in Head and Neck Cancer Guidelines: Systematic Review and Quality Assessment

PURPOSE OF REVIEW

A high proportion of head and neck cancer (HNC) patients use complementary and alternative medicine (CAM), however, healthcare professionals generally have little knowledge about the safety and efficacy of these therapies. The purpose of this study was to determine the quantity and assess the quality of CAM recommendations across clinical practice guidelines (CPGs) for the treatment and/or management of HNC.

RECENT FINDINGS

MEDLINE, EMBASE, and CINAHL were systematically searched for HNC CPGs published between 2009 and April 2020; the Guidelines International Network and the National Center for Complementary and Integrative Health websites were also were searched. Eligible CPGs containing CAM recommendations were assessed twice with the Appraisal of Guidelines, Research and Evaluation II (AGREE II) instrument, once for the overall CPG and once for the CAM sections. Of 305 unique search results, 7 CPGs mentioned CAM and 4 CPGs made CAM recommendations. The overall CPG scored higher than the CAM section for 4 of 6 domains (overall, CAM): scope and purpose (93.8%, 93.8%), clarity of presentation (88.2%, 64.6%), stakeholder involvement (68.8%, 39.6%), rigor of development (58.3%, 34.6%), editorial independence (42.7%, 42.7%), and applicability (51.6%, 19.8%). Quality varied within and between CPGs. Highly scoring CPGs serve as evidence-based resources that clinicians can use to inform their patients about safe and effective CAM use; CPGs achieving variable or lower scores could be improved in future updates based on currently available guideline development/implementation tools. Future research should identify CAM therapies supported by sufficient evidence to be included as part of HNC CPGs.

A systematic review and quality assessment of complementary and alternative medicine recommendations in insomnia clinical practice guidelines

Background

Sleep disorders encompass a wide range of conditions which affect the quality and quantity of sleep, with insomnia being a specific type of sleep disorder of focus in this review. Complementary and alternative medicine (CAM) is often utilized for various sleep disorders. Approximately 4.5% of individuals diagnosed with insomnia in the United States have used a CAM therapy to treat their condition. This systematic review identifies the quantity and assesses the quality of clinical practice guidelines (CPGs) which contain CAM recommendations for insomnia.

Methods

MEDLINE, EMBASE and CINAHL were systematically searched from 2009 to 2020, along with the Guidelines International Network, the National Center for Complementary and Integrative Health website, the National Institute for Health and Care Excellence, and the Emergency Care Research Institute. CPGs which focused on the treatment and/or management of insomnia in adults were assessed with the Appraisal of Guidelines, Research and Evaluation II (AGREE II) instrument.

Results

From 277 total results, 250 results were unique, 9 CPGs mentioned CAM for insomnia, and 6 out of the 9 made CAM recommendations relevant to insomnia. Scaled domain percentages from highest to lowest were scope and purpose, clarity of presentation, editorial independence, stakeholder involvement, rigour of development, and applicability. Quality varied within and across CPGs.

Conclusions

The CPGs which contained CAM recommendations for insomnia and which scored well could be used by health care professionals and patients to discuss the use of CAM therapies for the treatment/management of insomnia, while CPGs which scored lower could be improved in future updates according to AGREE II.

Supplementary Information

The online version contains supplementary material available at 10.1186/s12906-021-03223-3.

Knowledge Mapping of Acupuncture for Cancer Pain: A Scientometric Analysis (2000-2019)

Objective

This study aimed to demonstrate the state of the present situation and trends concerning the global use of acupuncture for cancer pain in the past 20 years.

Methods

Searched the Web of Science database from 2000 to 2019 related to acupuncture for cancer pain, and then used CiteSpace to conduct scientometric analysis to acquire the knowledge mapping.

Results

Yearly output has increased year by year, and the growth rate has become faster after 2012. According to the cluster analysis of institutions, authors, cited references, and keywords, 4, 4, 15, and 14 categories were obtained, respectively. The most productive countries, institutions, and authors are the USA, Mem Sloan Kettering Cancer Center, and Mao JJ, whose frequencies are 196, 24, and 17, respectively. However, the most important of them are Australia, Univ. Maryland, and Bao T, owing to their highest centrality, they are 0.90, 0.21, and 0.09 separately. Moreover, cited references that contributed to the most co-citations are Crew KD (2010), however, the most key cited reference is Roscoe JA (2003). Keywords such as acupuncture, pain, breast cancer, palliative care, and quality of life are the most frequently used. But auricular acupuncture is the crucial keyword. In the cluster analysis of institutions, authors, cited references, and keywords, the more convincing research categories are multiple myeloma, placebo effect, neck malignancies, and early breast cancer, with S values of 0.990, 0.991, 0.990, and 0.923, respectively. Therefore, they can be regarded as research hotspots in this field.

Conclusion

Based on the scientometric analysis in the past 20 years, the knowledge mapping of the country, institution, author, cited reference, and the keyword is gained, which has an important guiding significance for quickly and accurately positioning the trend in this field.