Developing an Evidence-Based Patient Education Guide on Pain Management for Asian Patients on Hospice

Asian Americans are the fastest-growing racial group in the United States. This article describes the development of a pain management assessment guide for Asian patients on hospice, their families, and their nurses. Thematic analysis was used to evaluate the applicability of research on pain, pain management, and barriers to pain management from primarily Asian countries to Asian patients on hospice in the United States. Thematic analysis of interviews with such patients concurs with research findings. Four themes emerged: enduring pain, preference for Chinese medicine remedies, fear of addiction, and concern about the side effects of pain medications. Interviews with experienced hospice nurses also aligned with these themes. Hospice nurses were asked to share their strategies for assessing and managing pain among their Asian hospice patients. Thematic analysis of their interviews revealed six strategies: focusing on treatment goals, involving family and caregivers, explaining the physiology of pain, explaining the progression of pain medications, addressing concerns about addiction, and managing the side effects of medications. The themes that emerged from patient and hospice nurse interviews were used to develop an evidence-based pain management assessment guide to support Asian patients on hospice, their family, and the nurses who care for them.

Opioid Nonadherence Risk Prediction of Patients with Cancer-Related Pain Based on Five Machine Learning Algorithms

Objectives

Opioid nonadherence represents a significant barrier to cancer pain treatment efficacy. However, there is currently no effective prediction method for opioid adherence in patients with cancer pain. We aimed to develop and validate a machine learning (ML) model and evaluate its feasibility to predict opioid nonadherence in patients with cancer pain.

Methods

This was a secondary analysis from a cross-sectional study that included 1195 patients from March 1, 2018, to October 31, 2019. Five ML algorithms, such as logistic regression (LR), random forest, eXtreme Gradient Boosting, multilayer perceptron, and support vector machine, were used to predict opioid nonadherence in patients with cancer pain using 43 demographic and clinical factors as predictors. The predictive effects of the models were compared by the area under the receiver operating characteristic curve (AUC_ROC), accuracy, precision, sensitivity, specificity, and F1 scores. The value of the best model for clinical application was assessed using decision curve analysis (DCA).

Results

The best model obtained in this study, the LR model, had an AUC_ROC of 0.82, accuracy of 0.82, and specificity of 0.71. The DCA showed that clinical interventions for patients at high risk of opioid nonadherence based on the LR model can benefit patients. The strongest predictors for adherence were, in order of importance, beliefs about medicines questionnaire (BMQ)-harm, time since the start of opioid, and BMQ-necessity. Discussion. ML algorithms can be used as an effective means of predicting adherence to opioids in patients with cancer pain, which allows for proactive clinical intervention to optimize cancer pain management. This trial is registered with ChiCTR2000033576.

"I Prefer to Stay Away": A Qualitative Study of Patients in an Opioid-Sparing Pain Management Protocol

OBJECTIVE

The aim of this study was to explore beliefs and behaviors of opioid pain medications among patients undergoing elective surgery.

BACKGROUND

Opioid dependence after surgery is a major contributor to the ongoing opioid epidemic. Recent efforts by surgeons and health systems have sought to improve the education patients receive regarding safe opioid use after surgery; however, little is known about patients' pre-existing beliefs surrounding opioids.

METHODS

Semistructured interviews were conducted with patients who underwent 1 of 4 common elective surgical procedures at 1 institution. Patients were specifically asked about their knowledge and beliefs about opioids before surgery and their opinions of opioid-sparing recovery after surgery. Coding was conducted through iterative steps, beginning with an initial cycle of rapid analysis, followed by focused coding, and thematic analysis.

RESULTS

Twenty-one patients were interviewed. Three major themes emerged regarding patient opinions about using opioids after surgery. First, there was widespread awareness among patients about opioid medications, and preoperatively, patients had specific intentions about using opioids, often informed by this awareness. Second, patients described a spectrum of opioid related behavior which both aligned and conflicted with preoperative intentions. Third, there was tension among patients about opioid-free postoperative recovery, with patients expressing support, opposition, and emphasis on tailoring recovery to patient needs.

CONCLUSIONS

Patients undergoing common surgical procedures often arrive at their surgical encounter with strong, pre-formed opinions about opioids. Eliciting these preexisting opinions may help surgeons better counsel patients about safe opioid use after surgery.

Adherence to Analgesic Drugs and its Associated Factors among Patients with Cancer Pain: A Crosssectional Study in China

Objectives: Pain is one of the most common and distressing symptoms co-occurring with cancer progression and treatment, and medication adherence plays an important role in achieving good pain control. However, research on medication adherence and influential factors among individuals with cancer pain (CP) is limited in China. The present study aimed to investigate the adherence to analgesics in patients with CP in China and to identify factors that may influence adherence. Methods: A cross-sectional study was conducted from June 2020 to February 2021. Study instruments consisted of a set of validated questionnaires, 5 measurement instruments including the numerical rating scale (NRS), ID-Pain, Morisky Medication Adherence Scale-Chinese validated version (MMAS-C), Beliefs about Medicines Questionnaire (BMQ) - Specific, and the Hospital Anxiety and Depression Scale (HADS). Results: A total of 141 participants with CP including 71 males (50.4%), aged 54.5±15.5 years were surveyed in this study. Overall, 83 patients (58.9%) showed adherence, but 58 patients (41.1%) showed non-adherence to analgesics. The univariate analysis showed that analgesic adherence was associated with pain duration of>3 months, outbreaks of pain in the last 24 hours, presence of side effects, getting analgesics in time, presence of neuropathic pain, stopping analgesics or adjusting dosage by themselves, presence of anxiety and depression, and beliefs about medicines. Moreover, the multivariate logistic regression showed that getting analgesic drugs in time (odds ratio [OR]=5.218, 95% confidence interval [CI] 1.691-16.100) and high BMQ-Necessity (OR=1.907, 95% CI 1.418-2.565) were associated with high adherence, stopping analgesics or adjusting dosage by themselves (OR=7.958, 95% CI 2.443-25.926) and high BMQ-Concern (OR=0.760, 95% CI 0.600-0.964) were more likely to be associated with non-adherence. Conclusion: In view of our findings, it may be critical for individuals to have a better understanding and strong beliefs about their prescribed analgesic drugs. Pain education, counseling and follow-up of patients and their caregivers, and removal of barriers to accessing analgesic drugs could be considered in further intervention strategies.

Pharmacist-Led Management Improves Treatment Adherence and Quality of Life in Opioid-Tolerant Patients With Cancer Pain: A Randomized Controlled Trial

Introduction

Opioid-tolerant patients are more likely to deviate from recommended treatments and to experience inadequate analgesia than opioid-naive ones. The aim of this study was to examine whether pharmacist-led management could help improve treatment adherence and quality of life.

Methods

Eligible patients were randomized in a 1:1 ratio to control group and intervention group. The control group received routine education and support, while the intervention group received additional individualized pharmacist-led care. The primary endpoint was treatment adherence in the per-protocol analysis, as evaluated by blinded assessors. An interim analysis was planned when 30% patients completed the study. Alpha was divided into the interim analysis (0.015) and the final analysis (0.035).

Results

In the interim analysis (97 and 87 patients in the control and intervention groups, respectively), the primary endpoint was met. Pharmacist-led intervention significantly increased treatment adherence (93.3 vs. 79.8%; OR: 2.25; 95% CI 1.02, 4.94; P = 0.013), quality of life (0.81 ± 0.17 vs. 0.72 ± 0.25; P = 0.008), and reporting of adverse events (82.7 vs. 61.9%; OR: 1.88; 95% CI 1.16, 3.07; P = 0.004). The two groups did not differ in pain control rate (66.7 vs. 57.1%; OR: 1.25; 95% CI 0.87, 1.78; P = 0.218), breakthrough pain-free rate (66.7 vs. 61.9%; OR: 1.12; 95% CI 0.78, 1.59; P = 0.532) and pain score (1.97 ± 1.04 vs. 2.15 ± 1.24; P = 0.522).

Conclusions

Pharmacist-led management improved treatment adherence, quality of life, and the reporting of adverse events in opioid-tolerant patients with cancer pain.

Trial Registration

ClinicalTrials.gov, NCT03455023.

Supplementary Information

The online version contains supplementary material available at 10.1007/s40122-021-00342-0.

Educational Intervention for Management of Acute Trauma Pain: A Proof-of-Concept Study in Post-surgical Trauma Patients

OBJECTIVE

Despite years of research and the development of countless awareness campaigns, the number of deaths related to prescription opioid overdose is steadily rising. Often, naive patients undergoing trauma-related surgery are dispensed opioids while in the hospital, resulting in an escalation to long-term opioid misuses. We explored the impact of an educational intervention to modify perceptions of opioid needs at the bedside of trauma inpatients in post-surgery pain management.

MATERIALS AND METHODS

Twenty-eight inpatients with acute post-surgical pain completed this proof-of-concept study adopting an educational intervention related to opioids and non-pharmacological strategies in the context of acute post-surgical pain. An education assessment survey was developed to measure pre- and post-education perceptions of opioid needs to manage pain. The survey statements encompassed the patient's perceived needs for opioids and other pharmacological and non-pharmacological therapeutics to manage acute pain. The primary outcome was the change in the patient's perceived need for opioids. The secondary (explorative) outcome was the change in Morphine Milligram Equivalents (MME) used on the day of the educational intervention while inpatients and prescribed at the time of the hospital discharge.

RESULTS

After the educational intervention, patients reported less agreement with the statement, "I think a short course of opioids (less than 5 days) is safe." Moreover, less agreement on using opioids to manage trauma-related pain was positively associated with a significant reduction in opioids prescribed at discharge after the educational intervention. The educational intervention might have effectively helped to cope with acute trauma-related pain while adjusting potential unrealistic expectancies about pain management and, more in general, opioid-related needs.

CONCLUSION

These findings suggest that trauma patients' expectations and understanding of the risks associated with the long-term use of opioids can be modified by a short educational intervention delivered by health providers during the hospitalization. Establishing realistic expectations in managing acute traumatic pain may empower patients with the necessary knowledge to minimize the potential of continuous long-term opioid use, opioid misuse, and the development of post-trauma opioid abuse and/or addiction.

Open-Label Placebo Treatment for Acute Postoperative Pain (OLP-POP Study): Study Protocol of a Randomized Controlled Trial

Introduction: Open-label placebos have been proposed as way of using long recognized analgesic placebo effects in an ethical manner. Recent evidence shows efficacy of open-label placebos for clinical conditions, but there is need for more research on open-label placebos in acute pain. In the treatment of acute postoperative pain, minimization of opioid related side effects remains one of the key challenges. Therefore, this study aims at investigating the potential of adding unconditioned open-label placebos to treatment as usual as a means of reducing opioid consumption and its related side effects in patients with acute postoperative pain. Methods and Analysis: This is the protocol of an ongoing single site randomized controlled trial. The first patient was enrolled in May 2020. In total, 70 patients suffering from acute postoperative pain following dorsal lumbar interbody fusion are randomized to either a treatment as usual group or an experimental intervention group. The treatment as usual group consists of participants receiving a patient-controlled morphine pump. On day 1 and 2 post-surgery, patients in the intervention group receive, in addition to treatment as usual, two open-label placebo injections per day along with an evidence-based treatment rationale explaining the mechanisms of placebos. The primary outcome is measured by means of self-administered morphine during day 1 and 2 post-surgery. Several other outcome measures including pain intensity and adverse events as well as potential predictors of placebo response are assessed. Analysis of covariance will be used to answer the primary research question and additional statistical techniques such as generalized linear mixed models will be applied to model the temporal course of morphine consumption. Discussion: This study will provide valuable insights into the efficacy of open-label placebos in acute pain and will potentially constitute an important step toward the implementation of open-label placebos in the clinical management of acute postoperative pain. In addition, it will shed light on a cost-efficient and patient-centered strategy to reduce opioid consumption and its related side effects, without any loss in pain management efficacy. Ethics and Dissemination: The "Ethikkommission Nordwest- und Zentralschweiz" (BASEC2020-00099) approved the study protocol. Results of the analysis will be submitted for publication in a peer-reviewed journal. Clinical Trial Registration: The study is registered at ClinicalTrials.gov (NCT04339023) and is listed in the Swiss national registry at kofam.ch (SNCTP000003720).

Validation of the Adolescent Barriers Questionnaire for use in Brazilian adolescents with cancer

OBJECTIVE

To translate, culturally adapt, and evaluate the psychometric properties of Adolescent Barriers Questionnaire for use in Brazilian adolescents with cancer aged 12 to 18 years, based on the original American Adolescent Barriers Questionnaire which was designed to measure the extent to which adolescents with cancer have concerns about reporting pain and using analgesics.

METHODS

The study analyzed the psychometric properties reliability (internal consistency and test-retest) and validity (known groups and convergent) of Adolescent Barriers Questionnaire in adolescents between 12 and 18 years of age with a diagnosis of cancer who were using or who had used analgesic medication (opioid or not) in a pediatric public health institution. It was estimated 64 adolescents as sample size and the research was conclude with 48.

RESULTS

Results of pre-test suggest good understanding (content validity index >0.9). The internal consistency value Cronbach's α was 88%. The convergent validity values ranged between -0.400 and -0.450. Analysis of known groups showed that the instrument discriminated groups of patients with solid vs. hematologic tumors. The intraclass correlation coefficient obtained after retest was 0.863.

CONCLUSION

After the process of translations, validations and analysis of psychometric properties, the Brazilian Portuguese version of Adolescent Barriers Questionnaire could be considered culturally adapted, valid, and reliable for the Brazilian adolescent population with cancer aged 12 to 18 years and it can be useful in practical clinic, offering the health professionals the opportunity to understand which barriers the adolescent with cancer can encounter and offer, thus, all the support to overcome them.

Pain medication adherence in patients with cancer: a pragmatic review

OBJECTIVE

Adherence to pain medication in patients with cancer is crucial for successful pain therapy. This review aimed to investigate: the rate of adherence, which factors influence adherence, whether adherence differs in diverse patient populations, whether there are methods to improve adherence, and the relationship between adherence and pain relief.

METHODS

This review was performed following the PRISMA guidelines. MEDLINE/Pubmed, Embase, Web Of Science, Cochrane and ClinicalTrials.gov were searched. All types of studies investigating adherence of patients with cancer, factors influencing adherence, and methods to improve adherence to pain medication were included. They were first screened on title and abstract and thereafter on full text. Selected articles were subjected to a quality assessment according to the PRISMA checklist. From included articles, study characteristics and outcomes were extracted.

RESULTS

Out of 795 articles, 18 were included. Different methods were used to measure adherence, which led to adherence rates ranging from 8.9% to 82.0%. White Americans and men were found to be more adherent than African Americans and women. Due to various barriers, adherence is often suboptimal. Fear of addiction, physiological and harmful effects, tolerance, and disease progression are common concerns. Interventions, such as pain education booklets, pain consults, and specialised nurses, may be beneficial to increase the adherence. Lower adherence rates were associated with lower pain relief.

CONCLUSION

Adherence of cancer patients to pain medication is suboptimal. Health care workers should focus on barriers to increase the adherence in order to obtain a better pain relief.

An evaluation of cancer patients' opinions about use of opioid analgesics and the role of clinical pharmacist in patient education in Turkey

Background Patients' potential misconceptions and concerns about using opioids are among the primary causes of patient-related barriers that may lead to failure in pain management. These barriers can be eliminated through educational interventions, thus achieving better pain management. Objective The aim of this study was to assess patients' beliefs about opioids, reduce the impact of patient-related barriers through educational intervention by a clinical pharmacist, and improve patients' adherence to opioid analgesic treatment. Setting The study was conducted in the Hacettepe University Training and Research Oncology Hospital, Department of Algology in Ankara, Turkey. Method A prospective study conducted between September, 2018 and May, 2019. Patients were included who had been diagnosed with cancer, had been prescribed opioid analgesics, and who attended the pain unit during the period this study was conducted. Patients' beliefs about opioids were assessed using the Beliefs about Medicine Questionnaire (BMQ) right before and 1 month after an educational intervention was provided by a clinical pharmacist. Also, patients' adherence to the opioid regimen was assessed using a validated Self-Report Measure of Adherence questions in Turkish. Main outcome measure The mean scores of the BMQ Necessity Subscale and Concern Subscale, and a level of adherence to opioid treatment. Results Sixty patients who met the inclusion criteria were included and follow-up was completed with 38 patients. Although an increase was detected in the total score of the Necessity subscale after provision of education (p = 0.398), a statistically significant (p < 0.001) decrease was found in the total score of the 'Concern' subscale, which suggests that patients believe the benefits of opioids outweigh the risks. The patients' pain scores were decreased (p = 0.004); furthermore a significant increase was found in the adherence scores (3.16-3.55) (p = 0.027), and a high level of adherence was observed among the patients in the post-education assessment (p = 0.021). Conclusion The integration of a clinical pharmacist into the pain management team may have a positive impact on the patients' knowledge, concerns and misconceptions about opioids, which may improve adherence and effective pain management in cancer treatment.

Relationship Between Adherence to Opioid Analgesics and Pain Beliefs Among Patients with Cancer Pain at Tertiary Care Hospitals in Malaysia

CONTEXT

Pain is a common and distressing symptom among cancer patients. Opioid analgesics are the mainstay of cancer pain management, and adequate adherence plays an important role in achieving good pain control.

PURPOSE

To determine the level of adherence to opioid analgesics in patients with cancer pain and to identify factors that may influence the adherence.

PATIENT AND METHODS

This was a cross-sectional study conducted from March to June 2018 at two tertiary care hospitals in Malaysia. Study instruments consisted of a set of validated questionnaires; the Medication Compliance Questionnaire, Brief Pain Inventory and Pain Opioid Analgesic Beliefs─Cancer scale.

RESULTS

A total of 134 patients participated in this study. The patients' adherence scores ranged from 52-100%. Factors with a moderate, statistically significant negative correlation with adherence were negative effect beliefs (r_s= -0.53, p<0.001), pain endurance beliefs (r_s = -0.49, p<0.001) and the use of aqueous morphine (r_s = -0.26, p=0.002). A multiple linear regression model on these predictors resulted in a final model which accounted for 47.0% of the total variance in adherence (R² = 0.47, F (7, 126) = 15.75, p<0.001). After controlling for other variables, negative effect beliefs were the strongest contributor to the model (β = -0.39, p<0.001) and uniquely explained 12.3% of the total variance.

CONCLUSION

The overall adherence to opioid analgesics among Malaysian patients with cancer pain was good. Negative effects beliefs regarding cancer pain and opioids strongly predicted adherence.

Relationships between patient-related attitudinal barriers, analgesic adherence and pain relief in Chinese cancer inpatients

PURPOSE

The purpose of this study was to evaluate patient-related attitudinal barriers and identify associated factors in Chinese cancer inpatients receiving opioids and to explore relationships between patient-related attitudinal barriers, analgesic adherence and pain relief.

METHODS

A cross-sectional study was conducted. A total of 146 participants completed face-to-face surveys, including information about demographics, the Barriers Questionnaire-Chinese (BQ-C), analgesic adherence, average pain and breakthrough pain in the past 24 h. The Mann-Whitney U test and Kruskal-Wallis test were performed to test the differences in the attitudinal barrier scores between the adherence and nonadherence groups, the complete and incomplete pain relief groups and the groups based on demographics.

RESULTS

The majority of participants in this study were men (67.8%), over half of all participants were less than 60 years old, gastrointestinal cancer (47.3%) was the most common diagnosis and 59 (40.4%) acquired comprehensive pain education from the last discharge guidance procedure. The total BQ-C mean (SD) score was 1.61 ± 0.94. A total of 87 (59.6%) patients with cancer pain were completely relieved. Most of the patients (73.3%) completely took analgesics by orders. There was no significant difference in the total BQ-C score between the adherence group and the nonadherence group (P > 0.05), but the difference was significant between the complete pain relief group and the incomplete pain relief group (P < 0.05).

CONCLUSION

The findings of this study support unsatisfactory pain management and moderate analgesic adherence for Chinese inpatients. It is suggested that patient-related attitudinal barriers do not play an undermining role in pain management by negatively affecting patients' analgesic adherence. Conversely, patients' beliefs are more likely to be shaped by under treatment rather than as a cause.

Factors Related to Adherence to Opioids in Black Patients With Cancer Pain

CONTEXT

Cancer pain relief is often inadequate because of poor adherence to pain medication, especially for black patients.

OBJECTIVES

The purpose of this study is to describe factors related to adherence to around-the-clock opioids among 110 black patients being treated for cancer pain.

METHODS

Sociodemographic, clinical, symptoms, and social support data were collected at baseline; pain and adherence data were collected at 30 days. Associations between these variables and opioid adherence measured by Medication Event Monitoring System were estimated using multiple regression.

RESULTS

Mean age was 56 (±10.1), the majority were women (63%) and college educated (56%). Mean pain severity at baseline equaled 4.6 (±2.3). Mean dose adherence was 60% (±28.5), while mean schedule adherence was 33.0% (±31.0). In adjusted analysis, 26% of the variance in dose adherence was explained by recent chemotherapy, changes in pain, concerns about nausea, and doctors' focus on cure versus pain control (P<0.001); 27% of the variance in schedule adherence was explained by recent chemotherapy, changes in pain, symptom burden, and concerns about doctors focus on cure versus pain control (P<0.001).

CONCLUSION

Findings confirm pain medication adherence is poor and pain was not well relieved. Multiple factors influence adherence to around-the-clock opioids. Clinicians need to partner with patients by providing a personalized pain treatment plan including an in-depth assessment of treatment choices and adherence.

Satisfaction with pain management and impact of pain on quality of life in cancer patients

AIM

To evaluate the prevalence of pain in cancer outpatients in Taiwan and to investigate the impact of pain on quality of life (QoL) and patient satisfaction. Results were compared to those of a similarly designed study conducted in 2008 to identify trends.

METHODS

Adult patients with cancer treated as outpatients in hospitals throughout Taiwan were recruited. Pain intensity and the extent to which pain interfered with QoL were self-reported using a modified version of the Brief Pain Inventory. Patients also indicated their level of satisfaction with their physician, as well as with their pain control.

RESULTS

A total of 2652 patients were enrolled from 16 sites. Of these, 1167 (44.0%) patients reported experiencing pain during the previous week. Prevalence and severity of pain were highest in patients with progressive disease. A higher pain severity score was significantly associated with greater interference in both physical and psychological functions. Overall, 86.0% of all participants expressed satisfaction with their physician and 84.8% were satisfied with their pain control; satisfaction rates were associated with pain severity. Compared with the findings from the 2008 study, pain prevalence was notably lower and patient satisfaction was significantly greater in the current study.

CONCLUSIONS

Prevalence and severity of pain were associated with disease stage. Pain interference on QoL correlated significantly with pain severity. Treatment of pain in cancer patients in Taiwan seems to have improved from 2008 to 2014, possibly attributable to new cancer pain treatment guidelines and the wider availability of novel analgesic therapies.

Cancer pain management needs and perspectives of patients from Chinese backgrounds: a systematic review of the Chinese and English literature

Objective

More than half of all cancer patients experience unrelieved pain. Culture can significantly affect patients’ cancer pain-related beliefs and behaviors. Little is known about cultural impact on Chinese cancer patients’ pain management. The objective of this review was to describe pain management experiences of cancer patients from Chinese backgrounds and to identify barriers affecting their pain management.

Method

A systematic review was conducted adhering to Preferred Reporting Items for Systematic Reviews and Meta-Analyses guidelines. Studies were included if they reported pain management experiences of adult cancer patients from Chinese backgrounds. Five databases were searched for peer-reviewed articles published in English or Chinese journals between1990 and 2015. The quality of included studies was assessed using Joanna Briggs Institution's appraisal tools.

Results

Of 3,904 identified records, 23 articles met criteria and provided primary data from 6,110 patients. Suboptimal analgesic use, delays in receiving treatment, reluctance to report pain, and/or poor adherence to prescribed analgesics contributed to the patients’ inadequate pain control. Patient-related barriers included fatalism, desire to be good, low pain control belief, pain endurance beliefs, and negative effect beliefs. Patients and family shared barriers about fear of addiction and concerns on analgesic side effects and disease progression. Health professional–related barriers were poor communication, ineffective management of pain, and analgesic side effects. Healthcare system–related barriers included limited access to analgesics and/or after hour pain services and lack of health insurance.

Significance of results

Chinese cancer patients’ misconceptions regarding pain and analgesics may present as the main barriers to optimal pain relief. Findings of this review may inform health interventions to improve cancer pain management outcomes for patients from Chinese backgrounds. Future studies on patients’ nonpharmacology intervention-related experiences are required to inform multidisciplinary and biopsychosocial approaches for culturally appropriate pain management.

Determinants of opioid efficiency in cancer pain: a comprehensive multivariate analysis from a tertiary cancer centre

BACKGROUND

Pain is one of the most terrifying symptoms for cancer patients. Although most patients with cancer pain need opioids, complete relief of pain is hard to achieve. This study investigated the factors influencing persistent pain-free survival (PPFS) and opioid efficiency.

MATERIALS AND METHODS

A prospective study was conducted on 100 patients with cancer pain, hospitalized at the medical oncology clinic of Akdeniz University. Patient records were collected including patient demographics, the disease, treatment characteristics, and details of opioid usage. Pain intensity was measured using a patient self-reported visual analogue scale (VAS). The area under the curve (AUC) reflecting the pain load was calculated from daily VAS tables. PPFS, the primary measure of opioid efficacy, was described as the duration for which a patient reported a greater than or equal to two-point decline in their VAS for pain. Predictors of opioid efficacy were analysed using a multivariate analysis.

RESULTS

In the multivariate analysis, PPFS was associated with the AUC for pain (Exp (B)=0.39 (0.23-0.67), P=0.001), the cumulative opioid dosage used during hospitalisation (Exp (B)=1.00(0.99-1.00), P=0.003) and changes in the opioid dosage (Exp (B)=1.01 (1.00-1.01), P=0.016). The change in VAS score over the standard dosage of opioids was strongly associated with current cancer treatment (chemotherapy vs. others) (β=-0.31, T=-2.81, P=0.007) and the VAS for pain at the time of hospitalisation (β=-0.34, T=-3.07, P= 0.003).

CONCLUSIONS

The pain load, opioid dosage, concurrent usage of chemotherapy and initial pain intensity correlate with the benefit received from opioids in cancer patients.

A preliminary report on adjuvant analgesic efficacy of HANS in opioid tolerant patients with cancer pain

OBJECTIVE

To observe the adjuvant analgesic efficacy of Han's Acupoint Nerve Stimulator (HANS) in opioid tolerant patients with cancer pain.

METHODS

A prospective non-controlled study was conducted. Opioid tolerant patients with cancer pain were enrolled and treated with both routinely analgesics and adjuvant HANS (2/100 Hz for 30 min/d, 5 d on and 2 d off for two weeks). Cancer pain, quality of life (QOL), anxiety and depression were assessed before enrollment and on d 8 and d 15 with the BPI-C, EORTC QLQ-C30, and self-rating anxiety scale (SAS)/self-rating depression scale (SDS), respectively; the therapeutic frequency of breakthrough pain (BP) and daily opioid dose were also recorded.

RESULTS

Totally 47 patients meeting the inclusion criteria participated in this study; 43 patients completed the two-week treatment and assessment. The mean scores of patient's "worst" and "least" pain intensity assessed with BPI-C decreased significantly on d 8 and d 15; the therapeutic frequency of BP also significantly decreased; but the average daily dose of opioids did not change significantly. For the nine symptoms in EORTC QLQ-C30 assessment, the mean scores of pain, fatigue, constipation and insomnia were significantly lower on d 8 and d 15 compared with baseline; the mean scores of the overall health status, nausea/vomiting and the incidence rates of both anxiety and depression also decreased significantly on d 15.

CONCLUSIONS

To opioid tolerant patients with cancer pain, adjuvant treatment with HANS could improve pain release and patients' QOL by decreasing the severity of pain, fatigue, constipation, insomnia and other concomitant symptoms; it could also decrease the incidence rates of anxiety and depression.