The CanPain SCI Clinical Practice Guidelines for Rehabilitation Management of Neuropathic Pain after Spinal Cord: introduction, methodology and recommendation overview

"STUDY DESIGN: Clinical practice guidelines. OBJECTIVES: The objective was to develop the first Canadian clinical practice guidelines for the management of neuropathic pain in people with spinal cord injury (SCI). SETTING: The guidelines are relevant for inpatient and outpatient SCI rehabilitation settings in Canada. METHODS: The guidelines were developed in accordance with the Appraisal of Guidelines for Research and Evaluation II tool. A Steering Committee and Working Group reviewed the relevant evidence on neuropathic pain management (encompassing screening and diagnosis, treatment and models of care) after SCI. The quality of evidence was scored using Grading of Recommendations Assessment, Development and Evaluation (GRADE). A consensus process was followed to achieve agreement on recommendations and clinical considerations. RESULTS: The Working Group developed 12 recommendations for screening and diagnosis, 12 recommendations for treatment and 5 recommendations for models of care. Important clinical considerations accompany each recommendation. CONCLUSIONS: The Working Group recommendations for the management of neuropathic pain after SCI should be used to inform practice."

The CanPain SCI Clinical Practice Guidelines for Rehabilitation Management of Neuropathic Pain after Spinal Cord: introduction, methodology and recommendation overview.

STUDY DESIGN: Clinical practice guidelines. OBJECTIVES: The objective was to develop the first Canadian clinical practice guidelines for the management of neuropathic pain in people with spinal cord injury (SCI). SETTING: The guidelines are relevant for inpatient and outpatient SCI rehabilitation settings in Canada. METHODS: The guidelines were developed in accordance with the Appraisal of Guidelines for Research and Evaluation II tool. A Steering Committee and Working Group reviewed the relevant evidence on neuropathic pain management (encompassing screening and diagnosis, treatment and models of care) after SCI. The quality of evidence was scored using Grading of Recommendations Assessment, Development and Evaluation (GRADE). A consensus process was followed to achieve agreement on recommendations and clinical considerations. RESULTS: The Working Group developed 12 recommendations for screening and diagnosis, 12 recommendations for treatment and 5 recommendations for models of care. Important clinical considerations accompany each recommendation. CONCLUSIONS: The Working Group recommendations for the management of neuropathic pain after SCI should be used to inform practice.

The CanPain SCI Clinical Practice Guidelines for Rehabilitation Management of Neuropathic Pain after Spinal Cord: Recommendations for treatment.

STUDY DESIGN: Clinical practice guidelines. OBJECTIVES: To develop the first Canadian clinical practice guidelines for treatment of neuropathic pain in people with spinal cord injury (SCI). SETTING: The guidelines are relevant for inpatient and outpatient SCI rehabilitation settings in Canada. METHODS: The CanPainSCI Working Group reviewed the evidence for different treatment options and achieved consensus. The Working Group then developed clinical considerations for each recommendation. Recommendations for research are also included. RESULTS: Twelve recommendations were developed for the management of neuropathic pain after SCI. The recommendations address both pharmacologic and nonpharmacologic treatment modalities. CONCLUSIONS: An expert Working Group developed recommendations for the treatment of neuropathic pain after SCI that should be used to inform practice.

The CanPain SCI Clinical Practice Guideline for Rehabilitation Management of Neuropathic Pain after Spinal Cord: recommendations for model systems of care.

STUDY DESIGN: Clinical practice guidelines. OBJECTIVES: The project objectives were to develop the first Canadian recommendations on a model of care for the management of at- and below-level neuropathic pain in people with spinal cord injury (SCI). SETTING: The guidelines are relevant for inpatient and outpatient SCI rehabilitation settings in Canada. METHODS: On the basis of a review of the Accreditation Canada standards, the Steering Committee developed questions to guide the CanPainSCI Working Group when developing the recommendations. The Working Group agreed on recommendations through a consensus process. RESULTS: The Working Group developed five recommendations for the organization of neuropathic pain rehabilitation care in people with SCI. CONCLUSIONS: The Working Group recommendations for a model of care for at- and below-level neuropathic pain after SCI should be used to inform clinical practice.

The CanPain SCI Clinical Practice Guidelines for Rehabilitation Management of Neuropathic Pain after Spinal Cord: screening and diagnosis recommendations.

STUDY DESIGN: Clinical practice guidelines. OBJECTIVES: To develop the first Canadian clinical practice guidelines for screening and diagnosis of neuropathic pain in people with spinal cord injury (SCI). SETTING: The guidelines are relevant for inpatient and outpatient SCI rehabilitation settings in Canada. METHODS: The CanPainSCI Working Group reviewed evidence to address clinical questions regarding screening and diagnosis of neuropathic pain after SCI. A consensus process was followed to achieve agreement on recommendations and clinical considerations. RESULTS: Twelve recommendations, based on expert consensus, were developed for the screening and diagnosis of neuropathic pain after SCI. The recommendations address methods for assessment, documentation tools, team member accountability, frequency of screening and considerations for diagnostic investigation. Important clinical considerations accompany each recommendation. CONCLUSIONS: The expert Working Group developed recommendations for the screening and diagnosis of neuropathic pain after SCI that should be used to inform practice.

The International Spinal Cord Injury Pain Extended Data Set (Version 1.0).

OBJECTIVES: The objective of this study was to develop the International Spinal Cord Injury Pain Extended Data Set (ISCIPEDS) with the purpose of guiding the assessment and treatment of pain after spinal cord injury (SCI). SETTING: International. METHODS: The ISCIPEDS was reviewed by members of the International SCI Data Sets Committee, the International Spinal Cord Society Executive and Scientific Committees, American Spinal Injury Association and American Pain Society Boards, and the Neuropathic Pain Special Interest Group of the International Association for the Study of Pain, individual reviewers and societies. RESULTS: The working group recommended four assessment domains for the ISCIPEDS: (i) Pain symptoms including variables related to pain type, temporal course, severity, unpleasantness, tolerability of pain and questionnaires assessing pain type and symptom severity; (ii) Sensory signs to detect and quantify sensory abnormalities commonly associated with neuropathic pain, including dynamic mechanical and thermal allodynia, and hyperalgesia; (iii) Treatments (ongoing and past 12 months); and (iv) Psychosocial factors and comorbid conditions. CONCLUSION: The ISCIPEDS was designed to be used together with the International SCI Pain Basic Data Set and provide a brief yet thorough assessment of domains related to chronic pain in individuals with SCI. The data set includes pain-relevant self-reported assessments, questionnaires and sensory examinations. The recommendations were based on (i) their relevance to individuals with SCI and chronic pain, (ii) the existence of published findings supporting the utility of the selected measures for use in individuals with SCI, and to the greatest extent possible (iii) their availability in the public domain free of charge.

Common data elements for spinal cord injury clinical research: a National Institute for Neurological Disorders and Stroke project.

OBJECTIVES: To develop a comprehensive set of common data elements (CDEs), data definitions, case report forms and guidelines for use in spinal cord injury (SCI) clinical research, as part of the CDE project at the National Institute of Neurological Disorders and Stroke (NINDS) of the US National Institutes of Health. SETTING: International Working Groups. METHODS: Nine working groups composed of international experts reviewed existing CDEs and instruments, created new elements when needed and provided recommendations for SCI clinical research. The project was carried out in collaboration with and cross-referenced to development of the International Spinal Cord Society (ISCoS) International SCI Data Sets. The recommendations were compiled, subjected to internal review and posted online for external public comment. The final version was reviewed by all working groups and the NINDS CDE team before release. RESULTS: The NINDS SCI CDEs and supporting documents are publically available on the NINDS CDE website and the ISCoS website. The CDEs span the continuum of SCI care and the full range of domains of the International Classification of Functioning, Disability and Health. CONCLUSION: Widespread use of CDEs can facilitate SCI clinical research and trial design, data sharing and retrospective analyses. Continued international collaboration will enable consistent data collection and reporting, and will help ensure that the data elements are updated, reviewed and broadcast as additional evidence is obtained.

The International Spinal Cord Injury Pain Basic Data Set (version 2.0).

OBJECTIVES: To revise the International Spinal Cord Injury Pain Basic Data Set (ISCIPBDS) based on new developments in the field and on suggestions from the spinal cord injury (SCI) and pain clinical and research community. SETTING: International. METHODS: The ISCIPBDS working group evaluated suggestions regarding the utility of the ISCIPBDS and made modifications in response to these and to significant developments in the field. The revised ISCIPBDS (version 2.0) was reviewed by members of the Executive Committee of the International SCI Standards and Data Sets, the International Spinal Cord Society (ISCoS) Executive and Scientific Committees, the American Spinal Injury Association and American Pain Society Boards and the Neuropathic Pain Special Interest Group of the International Association for the Study of Pain, individual reviewers and societies and the ISCoS Council. RESULTS: The ISCIPBDS (version 2.0) is significantly shortened but still contains clinically relevant core questions concerning SCI-related pain. The revisions include an updated SCI pain classification, omission of three questions regarding temporal pain pattern and three pain interference questions. The remaining three pain interference questions concern perceived interference with activities, mood and sleep for overall pain rather than for individual pain problems and are scored on a 0 to 10 scale.

Psychometric evaluation of the Spanish version of the MPI-SCI.

STUDY DESIGN: Postal surveys. OBJECTIVES: To confirm the factor structure of the Spanish version of the MPI-SCI (MPI-SCI-S, Multidimensional Pain Inventory in the SCI population) and to test its internal consistency and construct validity in a Spanish population. SETTING: Guttmann Institute, Barcelona, Spain. METHODS: The MPI-SCI-S along with Spanish measures of pain intensity (Numerical Rating Scale), pain interference (Brief Pain Inventory), functional independence (Functional Independence Measure), depression (Beck Depression Inventory), locus of control (Multidimensional health Locus of Control), support (Functional Social Support Questionnaire (Duke-UNC)), psychological well-being (Psychological Global Well-Being Index) and demographic/injury characteristics were assessed in persons with spinal cord injury (SCI) and chronic pain (n=126). RESULTS: Confirmatory factor analysis suggested an adequate factor structure for the MPI-SCI-S. The internal consistency of the MPI-SCI-S subscales ranged from acceptable (r=0.66, Life Control) to excellent (r=0.94, Life Interference). All MPI-SCI-S subscales showed adequate construct validity, with the exception of the Negative and Solicitous Responses subscales. CONCLUSIONS: The Spanish version of the MPI-SCI is adequate for evaluating chronic pain impact following SCI in a Spanish-speaking population. Future studies should include additional measures of pain-related support in the Spanish-speaking SCI population.

International Spinal Cord Injury Pain (ISCIP) Classification: Part 2. Initial validation using vignettes.

STUDY DESIGN: International validation study using self-administered surveys. OBJECTIVES: To investigate the utility and reliability of the International Spinal Cord Injury Pain (ISCIP) Classification as used by clinicians. METHODS: Seventy-five clinical vignettes (case histories) were prepared by the members of the ISCIP Classification group and assigned to a category by consensus. Vignettes were incorporated into an Internet survey distributed to clinicians. Clinicians were asked, for each vignette, to decide on the number of pain components present and to classify each using the ISCIP Classification. RESULTS: The average respondent had 86% of the questions on the number of pain components correct. The overall correctness in determining whether pain was nociceptive was 79%, whereas the correctness in determining whether pain was neuropathic was 77%. Correctness in determining if pain was musculoskeletal was 84%, whereas for visceral pain, neuropathic at-level spinal cord injury (SCI) and below-level SCI pain it was 85%, 57% and 73%, respectively. Using strict criteria, the overall correctness in determining pain type was 68% (versus an expected 95%), but with maximally relaxed criteria, it increased to 85%. CONCLUSIONS: The reliability of use of the ISCIP Classification by clinicians (who received minimal training in its use) using a clinical vignette approach is moderate. Some subtypes of pain proved challenging to classify. The ISCIP should be tested for reliability by applying it to real persons with pain after SCI. Based on the results of this validation process, the instructions accompanying the ISCIP Classification for classifying subtypes of pain have been clarified.

International spinal cord injury pain classification: part I. Background and description. March 6-7, 2009.

STUDY DESIGN: Discussion of issues and development of consensus. OBJECTIVE: Present the background, purpose, development process, format and definitions of the International Spinal Cord Injury Pain (ISCIP) Classification. METHODS: An international group of spinal cord injury (SCI) and pain experts deliberated over 2 days, and then via e-mail communication developed a consensus classification of pain after SCI. The classification was reviewed by members of several professional organizations and their feedback was incorporated. The classification then underwent validation by an international group of clinicians with minimal exposure to the classification, using case study vignettes. Based upon the results of this study, further revisions were made to the ISCIP Classification. RESULTS: An overall structure and terminology has been developed and partially validated as a merger of and improvement on previously published SCI pain classifications, combined with basic definitions proposed by the International Association for the Study of Pain and pain characteristics described in published empiric studies of pain. The classification is designed to be comprehensive and to include pains that are directly related to the SCI pathology as well as pains that are common after SCI but are not necessarily mechanistically related to the SCI itself. CONCLUSIONS: The format and definitions presented should help experienced and non-experienced clinicians as well as clinical researchers classify pain after SCI.

Reliability and validity of the International Spinal Cord Injury Basic Pain Data Set items as self-report measures.

OBJECTIVE: To evaluate the psychometric properties of a subset of International Spinal Cord Injury Basic Pain Data Set (ISCIBPDS) items that could be used as self-report measures in surveys, longitudinal studies and clinical trials. SETTING: Community. METHODS: A subset of the ISCIBPDS items and measures of two validity criteria were administered in a postal survey to 184 individuals with spinal cord injury (SCI) and pain. The responses of the participants were evaluated to determine: (1) item response rates (as an estimate of ease of item completion); (2) internal consistency (as an estimate of the reliability of the multiple-item measures); and (3) concurrent validity. RESULTS: The results support the utility and validity of the ISCIBPDS items and scales that measure pain interference, intensity, site(s), frequency, duration and timing (time of day of worst pain) in individuals with SCI and chronic pain. The results also provide psychometric information that can be used to select from among the ISCIBPDS items in settings that require even fewer items than are in the basic data set.

Differentiation between pain-related interference and interference caused by the functional impairments of spinal cord injury.

STUDY DESIGN: Face-to-face interview. OBJECTIVES: Pain interference is an important outcome measure in clinical pain trials. However, after spinal cord injury (SCI), interference caused by pain may be difficult to separate from interference caused by the physical impairment. The objective of this study was to determine the ability of the Life Interference subscale of the Multidimensional Pain Inventory, SCI-version (MPI-SCI) to differentiate between pain-related interference and the interference caused by the physical impairments of SCI. SETTING: VA Medical Center and Miami Project to Cure Paralysis, Miami, FL, USA. METHODS: The subscales of the MPI-SCI (Life Interference (LI), Pain Interference with Daily Activities (PA), Performance of General Activities (GA)), pain intensity, Pain Disability Index (PDI), Functional Independence Measure (FIM), Beck Depression Inventory (BDI) and demographic/injury characteristics were assessed in persons with SCI and chronic pain (n=180). RESULTS: After controlling for age, time since injury and severity of injury, LI subscale was highly correlated with the PA (r=0.58, P<0.001) and PDI (r=0.61, P<0.001) scores. LI subscale was also significantly correlated with pain intensity (r=0.29, P<0.001) and with the BDI (r=0.39, P<0.001). In contrast, LI subscale was not significantly associated with the GA or FIM scores. CONCLUSIONS: Because of the physical impairments associated with SCI, outcome measures specifically evaluating pain interference may be confounded. This study suggests that the LI subscale administered in an interview format is appropriate for measuring pain-specific interference in the SCI chronic pain population.

The international spinal cord injury pain basic data set.

OBJECTIVE: To develop a basic pain data set (International Spinal Cord Injury Basic Pain Data Set, ISCIPDS:B) within the framework of the International spinal cord injury (SCI) data sets that would facilitate consistent collection and reporting of pain in the SCI population. SETTING: International. METHODS: The ISCIPDS:B was developed by a working group consisting of individuals with published evidence of expertise in SCI-related pain regarding taxonomy, psychophysics, psychology, epidemiology and assessment, and one representative of the Executive Committee of the International SCI Standards and Data Sets. The members were appointed by four major organizations with an interest in SCI-related pain (International Spinal Cord Society, ISCoS; American Spinal Injury Association, ASIA; American Pain Society, APS and International Association for the Study of Pain, IASP). The initial ISCIPDS:B was revised based on suggestions from members of the Executive Committee of the International SCI Standards and Data Sets, the ISCoS Scientific Committee, ASIA and APS Boards, and the Neuropathic Pain Special Interest Group of the IASP, individual reviewers and societies and the ISCoS Council. RESULTS: The final ISCIPDS:B contains core questions about clinically relevant information concerning SCI-related pain that can be collected by health-care professionals with expertise in SCI in various clinical settings. The questions concern pain severity, physical and emotional function and include a pain-intensity rating, a pain classification and questions related to the temporal pattern of pain for each specific pain problem. The impact of pain on physical, social and emotional function, and sleep is evaluated for each pain.

Types and effectiveness of treatments used by people with chronic pain associated with spinal cord injuries: influence of pain and psychosocial characteristics.

STUDY DESIGN: Postal survey. OBJECTIVES: Because of the high prevalence and inadequate control of pain following spinal cord injury (SCI), it is important to have information about the factors associated with the use of specific pain therapies. We conducted this study to evaluate the ability of pain characteristics and psychosocial factors to predict the use of treatments. SETTING: The Miami Project to Cure Paralysis (Miami, FL, USA). METHODS: People with SCI (n=120) were mailed a packet containing a questionnaire with questions regarding demographic factors, pain characteristics, and pain treatments along with a copy of the Multidimensional Pain Inventory. RESULTS: A total of 59% of the respondents had been prescribed treatment or self-initiated efforts to treat pain over the previous 18-month period. The most common treatments used by this sample were massage (26.6%), opioids (22.5%) and nonsteroidal anti-inflammatory drugs (NSAIDs) (20%). The most effective treatments overall were 'physical therapies' with 50% receiving these treatments indicating that their pain was 'considerably reduced' or that they were 'pain free.' Opioids and anticonvulsants were perceived to be the most effective pharmacological agents prescribed (33.3 and 23.8% reporting their pain was considerably better or eliminated, respectively). People using prescription medication reported significantly greater pain severity, more widespread pain, more descriptive adjectives, more evoked pain, greater difficulty in dealing with pain, and more interference and decreased activity levels due to pain, compared to people not using prescription medication. A combination of greater difficulty in dealing with pain, intense pain, presence of evoked pain, and higher level of perceived support from significant others was predictive of taking prescription medication. CONCLUSION: People taking prescription medication reported significantly more intense pain with neuropathic characteristics that significantly affected daily life and routine activities. A substantial percentage of individuals with pain related to SCI did not obtain significant pain relief from prescription medications. None of the factors assessed predicted the use of nonprescription treatments. The results of this study confirm the inadequacy of available modalities to manage chronic pain related to SCI.

Chronic pain after spinal injury: interference with sleep and daily activities.

OBJECTIVES: To determine how chronic pain after spinal cord injury (SCI) interfered with sleep, exercise, work, household chores, and other daily activities and to define which clinical aspects of pain and psychosocial factors best predicted the extent of interference. DESIGN: Postal survey; follow-up to a previous survey conducted 6 months earlier. SETTING: General community. PARTICIPANTS: Individuals (n = 217) with traumatic SCI and chronic pain. INTERVENTION: Subjects answered questions regarding frequency of interference caused by pain on 5 activities: sleep, work, exercise, household chores, and other daily activities. Asked to self-report sadness, fatigue, or anxiety; and to describe location, quality, and intensity of pain. MAIN OUTCOME MEASURES: Demographic data (gender, age, level of injury); sociodemographic data (education, employment); self-reported psychosocial outlook; clinical characteristics of pain: location (drawing), quality (descriptors), and intensity (2 numeric rating scales). Regression analysis. RESULTS: The questionnaire was returned by 65.8% of the sample (217/330). A large number of the participants (77.3%) reported frequent interference caused by pain, ie, "often" to "always" in 1 or more of the 5 activities. The combination of high pain intensity and the use of multiple pain descriptors was significantly associated with frequent interference with falling asleep. Frequent sleep interruption was significantly associated with high pain intensity, male gender, anxiety, and higher age at time of injury. In working individuals, frequent interference due to pain was significantly associated with multiple pain descriptors, anxiety, low level of education, and being older at time of injury. CONCLUSION: Reported extent of pain interference in various areas of activity is related to clinical symptoms of pain as well as to psychologic and psychosocial factors rather than level of injury. The relationship between frequent interference, pain intensity, and multiple descriptors indicate that individuals experiencing several types of pain of high intensity are more likely than others to experience frequent interference with a variety of daily activities including sleep.

Relationships among clinical characteristics of chronic pain after spinal cord injury.

OBJECTIVE: To define relationships among various clinical characteristics of pain occurring after spinal cord injury (SCI). DESIGN: Postal survey. SETTING: General community. PARTICIPANTS: Of 330 subjects with SCI reporting chronic pain in a previous survey, 217 volunteered. INTERVENTIONS: Not applicable. MAIN OUTCOME MEASURES: Detailed pain history. RESULTS: Participants had been injured for an average of 8.2 +/- 5.1 years and 55.4% were tetraplegic. Most subjects marked multiple areas on a pain drawing with the back area most frequently (61.8%) indicated. The most common qualities reported were burning pain (59.9%) and aching pain (54.4%). Burning was significantly associated with pain in frontal parts of torso and genitals, buttocks, and lower extremities, whereas aching was significantly associated with neck and shoulders and back. The factor analysis of the relationships between level of injury, location of pain, quality of pain, pain intensity rating, duration of pain breaks, and time for pain onset resulted in 3 groupings: (1) multiple pain locations, burning pain, lower extremity; (2) aching pain, shoulder and neck, cervical injury; and (3) early onset of pain, no breaks to short breaks of pain, and high average pain intensity. CONCLUSIONS: Relationships among various clinical features of pain after SCI reveal common clinical patterns important for increased understanding of pain mechanisms and for the design of therapeutic interventions for pain management.

Perceived difficulty in dealing with consequences of spinal cord injury.

OBJECTIVES: To determine the perceived difficulty in dealing with consequences of spinal cord injury (SCI) and to explore patterns of how these complications are perceived. DESIGN: Postal survey. SETTING: General community. PARTICIPANTS: Individuals with traumatic SCI (n = 430). METHODS: Subjects (n = 877) were selected from The Miami Project database and were sent a questionnaire in which they were asked to rate their difficulty in dealing with 10 consequences of SCI, on a scale ranging from 0 (not hard at all) to 10 (extremely hard). RESULTS: The questionnaire was returned by 430 individuals (49%). Five consequences (decreased ability to walk or move, decreased control of bowel, decreased control of bladder, decreased sexual function, and pain) were rated highest (means, 8.2 to 6.2). High ratings of feeling sad were associated with high ratings of most other consequences, and a cluster analysis revealed interrelationships between the ways the various consequences were perceived. CONCLUSIONS: Several consequences of SCI are frequently perceived as being very difficult to deal with. Sadness may influence how well a person deals with other consequences of SCI. The observed patterns in perceived difficulty dealing with complications of SCI need to be explored further because they are important in our understanding and treatment of the medical conditions that may follow SCI.

Relations between self-rated musculoskeletal symptoms and signs and psychological distress in chronic neck and shoulder pain.

The purposes of the present study were to describe physical and psychological characteristics of 55 chronic pain patients with predominantly nociceptive neck and shoulder complaints, and to explore relationships between physical assessment methods, self-reported pain and psychological distress. The physical measures included cervical and shoulder mobility and muscle tenderness. The Pain Severity and Interference subscales from the Multidimensional Pain Inventory (MPI), Becks Depression Inventory (BDI), State-Trait Anxiety Inventory (STAI-Y), and a pain drawing assessed self-reports of pain and psychological distress. The number of tender points (TP score) correlated significantly with pain severity, (p < 0.01) Interference (p < 0.05), pain drawing score (p < 0.05), BDI (p < 0.05) and state anxiety (p < 0.05). No significant correlation was seen between TP score and age, pain duration or trait anxiety. The results suggest that there are relationships between observers' ratings of muscle tenderness (TP score) and self-reports of pain severity, interference of pain and psychological distress in patients with chronic cervico-brachial pain.

Pain threshold responses to two different modes of sensory stimulation in patients with orofacial muscular pain: psychologic considerations.

This study focuses on the influence of trait anxiety and mood variables on changes in tooth pain threshold following two similar methods of somatic afferent stimulation, one familiar (manual acupuncture) and one unfamiliar (low-frequency transcutaneous electrical nerve stimulation [low-TENS]). Twenty-one acupuncture responders, treated for long-lasting orofacial muscular pain but naive to low-TENS, were selected for the study. In an experimental session, acupuncture and low-TENS were randomly given during two periods separated by a rest interval. Tooth pain thresholds (PT) were measured before and after stimulation with a computerized electrical pulp tester. Trait anxiety and depression were assessed with psychometric forms before the experimental session in all patients, whereas momentary mood was assessed in 10 randomly selected patients with visual analogue scales during and after the two types of stimulation. Following acupuncture, the group average PT increased significantly, whereas no significant change was observed following low-TENS. Higher scores on trait anxiety correlated significantly with a low PT increase following low-TENS, and higher ratings of stress correlated significantly with a low PT increase following acupuncture. This indicates that the magnitude of analgesia induced by these methods may be modified by psychologic factors like anxiety and stress.