Pain management and health care policy

Opioid analgesics are essential for the management of moderate to severe pain. In spite of their documented effectiveness, opioids are often underutilized, a factor which has contributed significantly to the undertreatment of pain. Many countries have developed true national policies on cancer pain and palliative care, and in others only guidelines for care have been developed. Ideally, national policies facilitate and legislate not only a patient's right to care, but also the necessary components of education and drug availability which are so critical for the appropriate achievement of public health programs.

Revelation of a personal placebo response: its effects on mood, attitudes and future placebo responding

While ethics of placebo use has been debated since discovery of the phenomena, there has yet to be a study that examines the aftereffect of individuals learning of a personal placebo response on their future ability to experience a placebo response. In the first study, eleven participants diagnosed with irritable bowel syndrome in a placebo study were interviewed individually about their personal placebo response. We found no changes in attitudes about the likelihood of using medical and non-medical treatments for pain, likelihood of participating in future studies or likeability and trust of experimenters. In addition, we found no changes in mood except for a slight improvement in frustration. In the second study, 77 undergraduate students from the University of Florida were divided into three conditions: placebo, control and repeated baseline. We used a double placebo design with verbal placebo suggestion and conditioning to induce a placebo response and to examine the effect of providing information about a participant's personal placebo response on their future placebo response. Using a heat thermode, we discovered that there were no differences in future pain responding between participants who were told that they experienced a placebo response versus those who were not. In addition, similar to the first study, we found no detrimental effects of the placebo information variables measured. These studies suggest the placebo response persists even after revelation of a personal placebo response and placebo use does not appear to cause adverse effects on mood and other attitude variables assessed.

Spinal cord stimulation in treatment of chronic benign pain: challenges in treatment planning and present status, a 22-year experience

OBJECTIVE

To present an in-depth analysis of clinical predictors of outcome including age, sex, etiology of pain, type of electrodes used, duration of pain, duration of treatment, development of tolerance, employment status, activities of daily living, psychological status, and quality of life. Suggestions for treatment of low back pain with a predominant axial component are addressed. We analyzed the complications and proposed remedial measures to improve the effectiveness of this modality.

METHODS

Study group consists of 410 patients (252 men, 58 women) with a mean age of 54 years and a mean follow-up period of 97.6 months. All patients were gated through a multidisciplinary pain clinic. The study was conducted over 22 years.

RESULTS

The early success rate was 80% (328 patients), whereas the long-term success rate of internalized patients was 74.1% (243 patients) after the mean follow-up period of 97.6 months. Hardware-related complications included displaced or fractured electrodes, infection, and hardware malfunction. Etiologies demonstrating efficacy included failed back syndrome, peripheral vascular disease, angina pain, complex regional pain syndrome I and II, peripheral neuropathy, lower limb pain caused by multiple sclerosis. Age, sex, laterality of pain or number of surgeries before implant did not play a role in predicting outcome. The percentage of pain relief was inversely related to the time interval between pain onset and time of implantation. Radicular pain with axial component responded better to dual Pisces electrode or Specify-Lead implantation.

CONCLUSION

Spinal cord stimulation can provide significant long-term pain relief with improved quality of life and employment. Results of this study will be effective in better defining prognostic factors and reducing complications leading to higher success rates with spinal cord stimulation.

Lack of influence of patient self-report of pain intensity on administration of opioids for suspected long-bone fractures

The purpose of the present study was to prospectively investigate the extent to which emergency providers base their decisions about pain management of suspected long-bone fracture on patient's self-reported pain intensity. Of 100 long-bone fracture patients presenting to 2 inner-city emergency departments, 69% received opioids as compared to 30% of 110 patients without long-bone fracture (RR = 2.3; 95% CI 1.6 to 3.1). After stratification by pain ratings on a validated self-reported numerical rating scale, fracture patients remained twice as likely to receive opioids as those without fracture (RR = 2.0; 95% CI 1.5 to 2.7). Similarly, multivariate adjustment for self-reported pain intensity had little effect on the observed association (RR = 2.1; 95% CI 1.6 to 2.8). We conclude that emergency providers do not primarily base their decisions about pain management of suspected long-bone fractures on patient self-reporting of pain intensity.

PERSPECTIVE

This article addresses the question of the role of self-reported pain intensity rating on the treatment of suspected fractures. The findings indicate that self-reported pain is not used as the most important measure of pain as recommended by expert panels. We speculate this may contribute to oligoanalgesia in the Emergency Department.

Monitoring the change: Current trends in outcome measure usage in physiotherapy

Physiotherapists have traditionally relied on impairment measures such as range of motion and muscle strength to monitor patient progress. The impact of treatment on patients' daily activities can be assessed with valid and reliable questionnaires, but the use of standardized questionnaires by physiotherapists appeared to be limited. A range of strategies were implemented that aimed to increase physiotherapists' use of standardized measures of functional activities. A simple random sample of 300 was drawn from a database of physiotherapy providers to a transport accident scheme, and was surveyed in March and September 2003, with response rates of 51% and 55%, respectively. There was a statistically significant (P<.05) increase in reported use of seven questionnaires and a significant reduction in the perception of barriers that were targeted by the interventions The most frequently utilized tests were a pain rating scale and questionnaires for lumbar and cervical problems. Physiotherapists' attitudes to outcome measurement were generally positive although there was a small but statistically significant (P=.02) reduction in mean attitude score over the re-test period. Physiotherapists in the population sampled significantly increased their reported use of a range of standardized outcome measures over the re-test period. The trend towards greater objectivity in measuring the progress of rehabilitation can enable physiotherapists to develop improved treatment plans with the patients' needs at the centre of the equation.

Tools for assessment of pain in nonverbal older adults with dementia: a state-of-the-science review

To improve assessment and management of pain in nonverbal older adults with dementia, an effective means of recognizing and evaluating pain in this vulnerable population is needed. The purpose of this review is to critically evaluate the existing tools used for pain assessment in this population to provide recommendations to clinicians. Ten pain assessment tools based on observation of behavioral indicators for use with nonverbal older adults with dementia were evaluated according to criteria and indicators in five areas: conceptualization, subjects, administration, reliability, and validity. Results indicate that although a number of tools demonstrate potential, existing tools are still in the early stages of development and testing. Currently, there is no standardized tool based on nonverbal behavioral pain indicators in English that may be recommended for broad adoption in clinical practice.

Improving subjective scaling of pain using Rasch analysis

Pain management outcomes assessment depends on valid measurement of pain. However, the validity of single-item scales, such as numeric or faces scales, with the assignment of ordinal numerical values to response scale categories, is questionable. The universal assumption that equal distances between response choices represent equal distances on the dimension being measured is essentially erroneous. Herein we demonstrate that Rasch analysis can be used to expose and repair scale inequity and reengineer scale structure. Thirty-one subjects with severe ocular surface disease repeatedly completed a 7-category faces pain scale. Rasch analysis demonstrated that response category 5 was underutilized, leading to disordering of the response scale. Collapsing category 5 into either category 4 or 6 produced an ordered 6-category faces scale that could be recalibrated with average Rasch person measures to create linear measurement on a continuous latent variable. The value of further alterations to the scale was explored, and the implication for scale redesign discussed. Rasch analysis could be applied to any subjective pain measure post-hoc to create linear measurement or applied during instrument development to optimize design.

PERSPECTIVE

Single-item scales like the faces scale or a 1-10 numerical rating scale are commonly used for the subjective assessment of pain. However, scores applied to response categories are arbitrary, so do not represent equidistant steps in the underlying latent variable (pain). Scale inequities are easily demonstrable and repairable with Rasch analysis.

Teaching Behavioral Pain Management to Healthcare Professionals: A Systematic Review of Research in Training Programs

Pain is a common and potentially debilitating condition. Whereas there is vast literature on developmentally appropriate behavioral techniques for pain management, results of curriculum evaluations and knowledge surveys reveal a dearth of awareness of these strategies in healthcare professionals. As a result, the development and evaluation of pain management training programs are important endeavors. Results of studies evaluating such programs are promising and suggest that training might be an effective means of impacting healthcare professionals' knowledge, attitudes, and even patient care. These results must be interpreted with caution, however, because the literature contains several conceptual and methodologic limitations. These limitations, in combination with the wide diversity in program components, format of delivery, and research methods, preclude definitive conclusions on the most practical and effective means to provide training. To address this question, further systematic work on the development and evaluation of pain management training programs is warranted.

PERSPECTIVE

To address the problems of dissemination of behavioral pain management techniques, the development and evaluation of pain management training programs are important endeavors. The current article presents a systematic review of studies evaluating such programs and provides recommendations for future systematic work in this area.

Differential predictors of pain and disability in patients with whiplash injuries

The psychological predictors of pain and disability were examined in a sample of people who sustained whiplash injuries during rear-end motor vehicle accidents. Sixty-five patients referred to a specialty pain clinic with a diagnosis of whiplash injury completed measures of depression, anxiety, catastrophizing, pain and perceived disability. Regression analysis revealed that psychological variables accounted for 18% of the variance in pain ratings. The magnification subscale of the Pain Catastrophizing Scale was the only variable that contributed significant, unique variance to the prediction of pain. Psychological variables accounted for 37% of the variance in perceived disability scores. In the latter analysis, however, none of the independent variables contributed significant, unique variance to the prediction of perceived disability. Psychological variables accounted for significant variance in disability ratings, even when controlling for pain intensity. Discussion focuses on the need to draw clearer distinctions between determinants of pain and disability, and directions for interventions aimed at minimizing disability following whiplash injury are suggested.

Observational visual analog scale in pediatric pain assessment: useful tool or good riddance?

DESIGN

The authors reviewed the available pediatric pain literature and selected those studies that reported quantitative information on the reliability and validity of, and the optimal cutoff points for, the visual analog scale (VAS) when used as an observational pediatric pain tool.

RESULTS

Available psychometric findings concerning the observational VAS (VAS obs ) are limited. The estimated interrater reliability of the VAS (obs) from 9 studies ranged from 0.36 to 0.91. The correlation between self-report and the VAS (obs) was variable and ranged 0.23 to 0.83 in 6 studies. The concurrent validity of the VAS (obs) and other pain instruments ranged from 0.42 to 0.86.

CONCLUSIONS

Further psychometric testing needs to be conducted on intraobserver reliability, responsiveness, and optimal cutoff points. Future research may guide the choice between VAS (obs) and the numerous behavioral pain instruments.

Some pain, some gain: reflections on the past two decades of neonatal pain research and treatment

This review reflects back on the progress that has been made in infant pain research over the past 20 years and how the research has influenced (or has failed to influence) the attitudes and practices of health professionals about infant pain. Progress in understanding of infant pain neurobiology, treatment, and measurement are discussed, and new directions for future research are proposed.

Sensation and Distress of Pain Scales: reliability, validity, and sensitivity

Psychometric properties of the Sensation and Distress of Pain Visual Analogue Scales (VAS) are compared to dual numerical rating scales (NRS) with data from a randomized controlled trial of postoperative patients. On postoperative days 1 and 2, 15-minute test-retest reliability was .73 to .82 for the VAS and slightly lower for the NRS, r = .72 to .78, while convergent validity of the scales ranged from r = .90 to .92; construct validity of sensation and distress ranged from r = .72 to .85; and discriminant validity was lower, r = .65 to .78. Both instruments were significantly associated with pain reduction following treatment, p < .05 to .01. The VAS scores were significantly lower, p < .01 to .001, and more evenly distributed than NRS scores. It is recommended that the VAS be used in research to produce continuous scores that are more suited to parametric analysis.

Children's pain: a mandate for change

There have been tremendous research advances in the past 15 years in knowledge about children's pain, and strategies for recognizing and managing that pain. However, the clinical care of children in pain remains a challenge. Children's pain continues to be frequently unrecognized, dismissed or ineffectively managed. A loud call for change is being voiced by physicians, nurses, children and their families. A review of the literature was conducted to document this issue. Starting with a Medline search of the key word 'child* + pain' and continuing with a snowball technique, articles and resources addressing children's pain were collected. Resources presented or published after 1990 were particularly sought because they theoretically reflect both current knowledge about children's pain and the implementation of this knowledge in practice. Unfortunately, although information on pain is available to help children, in many instances, it is not being used. The purpose of the present paper is twofold - to present an overview of current knowledge of children's pain, and factors that hinder its effective assessment and management; and to present a mandate for change. Children's postoperative pain is highlighted in this paper as an example of the gap between pain knowledge and clinical practice. Although treatment strategies differ across different types of pain, children's conditions and ages, the principles and mandate for change discussed in this paper are directly relevant to all categories of children's pain.

The Level of Expressed Need--a measure of help-seeking behaviour for chronic pain in the community

Chronic pain is a common and disabling condition, with a high impact on health and the health services in the community. The extent of help-seeking behaviour and factors that influence this are complex, but poorly understood. A simple, valid measure of help-seeking behaviour would be useful for community-based research, with a view to developing and evaluating interventions. The aims of the study were to test a hierarchical scale designed to measure help-seeking behaviour in chronic pain in postal surveys of the community, and to explore factors associated with responses. As part of a community survey of chronic pain, we developed the Level of Expressed Need (LEN) scale, based on questions about the use of treatment and professional advice for chronic pain. We compared this scale with two measures of chronic pain severity--the Chronic Pain Grade (CPG), and the Glasgow Pain Questionnaire (GPQ)--and analyzed associations with the SF36 general health questionnaire and demographic variables. Of 3605 respondents (corrected response rate 82%), 1817 reported chronic pain. Of these, 17% were at the mildest and 28% at the severest LEN. There were strong correlations with both the CPG (r=0.48) and the GPQ (r=0.55). There were, however, many important disparities in responses to these measures. Several other factors were independently associated with a high LEN in chronic pain: female gender, lower educational level, and physical, mental, pain and general health dimensions of the SF36 questionnaire. The LEN is a useful tool for measuring the help-seeking response to chronic pain in the general population. The findings confirm that this response is influenced by clinical and demographic factors in addition to the severity of the pain. Further development work will strengthen the instrument to explore these.

Improving the quality of pain treatment by a tailored pain education programme for cancer patients in chronic pain

Educational interventions, aiming to increase patients' knowledge and attitude regarding pain, can affect pain treatment. The purpose of this study was to evaluate the effects of a Pain Education Programme (PEP), on adequacy of pain treatment, and to describe characteristics predicting change in adequacy. The PEP consists of a multi-method approach in which patients are educated about the basic principles regarding pain, instructed how to report pain in a pain diary, how to communicate about pain, and how to contact healthcare providers. The effects of the PEP were evaluated taking into consideration the lack of well-established outcome measures to evaluate adequacy of pain treatment, the lack of long-term follow-up, and the influence of missing data.A prospective, randomized study was utilized in which 313 chronic cancer patients were followed-up until 8 weeks postdischarge. Adequacy of pain treatment was evaluated by means of the Amsterdam Pain Management Index (APMI), consisting of an integrated score of patients' Present Pain Intensity, Average Pain Intensity, and Worst Pain Intensity, corrected for patients' Tolerable Present Pain, with the analgesics used by the patient. At pretest, 60% of the patients in the hospital were treated inadequately for their pain. Postdischarge, the control group patients were significantly more inadequately treated at 2 weeks after discharge (56% vs 41%), at 4 weeks after discharge (62% vs 42%) and at 8 weeks after discharge (57% vs 51%) than the intervention group patients. While the level of inadequacy in the control groups remained relatively stable at all assessment points, a slight increase in the percentage of patients being treated inadequately was found in the intervention group patients over time. A beneficial effect of the PEP was found for patients both with and without district nursing. Variables predicting an improvement in adequacy of pain treatment consisted of the PEP, the APMI score at baseline, patients' level of physical functioning, patients' level of social functioning, the extent of adherence to pain medication, patients' pain knowledge, and the amount of analgesics used. These findings suggest that quality of pain treatment in cancer patients with chronic pain can be enhanced by educating patients about pain and improving active participation in their own pain treatment. The benefit from the PEP, however, decreases slightly over time, pointing at a need for ongoing education.

One-year trend in pain and disability relief recall in acute and chronic ambulatory low back pain patients

Clinicians use patients' recall of pain and disability relief as indicators of therapeutic effectiveness. Recall can change over time, however, and is influenced by factors other than true relief, including current health status. We have determined the trend in the relative contribution of current pain/disability and actual relief (current-baseline score) to relief recall over the course of 1 year. Self-referred patients (n=1182) seeking treatment from primary-care medical doctors and chiropractors in community-based clinics were asked to record present pain and disability, as well as perceived relief at five follow-up time points from 2 weeks to 12 months after initial consultation for acute and chronic low back pain (LBP). Multiple regression analysis was performed at each time point and over the five follow-up time points. We found a clear logarithmic time trend of increasing dependence of pain relief recall on present pain (P<0.0001) and a concomitant pattern of decreasing dependence on actual pain relief (P<0.0001). The patterns are fairly consistent for acute and chronic patients. The principal independent predictor of perceived pain/disability relief appears to be present pain/disability with actual relief playing a smaller role at all time points (P<0.0001) except for disability relief recall at 2 weeks (P=0.103). The findings are robust in LBP sufferers. Complaint characteristics including LBP chronicity, sciatica, LBP history, and comorbidity; psychosocial variables including stress, depression, and well being; sociodemographics; and treating provider type are not important independent predictors of pain and disability relief recall in ambulatory LBP patients. Perceived relief is too weakly related to present pain and disability to be accurate enough for use as a clinical assessment tool for individual patients. Physicians may need to use objective relief data to give the patient a realistic idea of actual improvement.

New developments in the assessment of pain in cancer patients

Pain occurs in more than 80% of cancer patients before death. During recent years major progress has taken place in our techniques for the adequate assessment of cancer pain. Major prognostic factors associated with the pain syndrome have been recognized. In addition, other prognostic factors associated with the characteristics of the patient have been defined. Valid tools have been developed that allow for the assessment of most of the prognostic variables associated with analgesic response. During recent years a major effort has been made to integrate the pain syndrome within the other complex symptoms that are often present in patients with advanced cancer. The interaction of pain and analgesic treatment with other symptoms and their management is discussed. Finally, areas where future research should focus in the area of the diagnosis and assessment of pain are discussed.