[What questions are appropriate for predicting the risk of chronic disease in patients suffering from acute low back pain?]. / Welche Fragen sind geeignet, ein Chronifizierungsrisiko von akuten Rückenschmerzen vorherzusagen? Eine prospektive klinische Studie.

AIM: The objective of the study was to develop a brief questionnaire to determine the risk of chronification for patients suffering from lumbar (low) back pain who are consulting a physician for the first or second time. METHOD: At the outset, and again after six months, a questionnaire with 167 valid items for chronification was distributed to patients in orthopedic offices. After six months, patients were contacted by mail to inquire whether they were still suffering from back pain. Based on outcome (persistence of back pain/absence of back pain) and by means of logistic regression analysis, those variables were determined that could predict actual chronification. RESULTS: The following items were predictive: "How strong was your back pain during the last week when it was most tolerable?" and "How much residual pain would you be willing to tolerate while still considering the therapy successful?" (Acceptance value, beta = 0.61), patient's educational level (beta = - 0.44), massage is experienced as bringing relief (beta = 0.44), 5 items of the Zung scale for depression (beta = 0.42), items of the scale for catastrophizing thoughts (beta = 0.41) and items of the scale for feelings of helplessness (beta = - 0.39) of the Kiel pain inventory; duration of the back pain for longer than 1 week (beta = 0.38), pain in other parts of the body (beta = 0.37); and female gender (beta = 0.25) CONCLUSION: Based on these questions, it was possible to predict the chronification of back pain with a probability of 78.05 %. A corresponding questionnaire and an evaluative table were developed.

[Primary headache in childhood and adolescence. The association between changes in family interaction patterns and therapy success--a pilot study]. / Primäre Kopfschmerzen im Kindes- und Jugendalter.

INTRODUCTION: Family interaction patterns are often involved in diseases and disorders in childhood and adolescence in complex ways (e.g in their development, maintenance and cure). The present study deals with the role of family factors in success in a pediatric headache therapy consisting of group hypnotherapy and systemic family consultation. METHODS: A sample of 12 outpatients, aged 9-15 years and balanced in sex, is investigated. Patients were diagnosed by IHS-criteria. Global symptom strain was measured by numeric rating scale (NRS) at pre-appointment and at 9-months follow-up appointment. Also family interaction patterns associated with the occurrence of headache symptoms were measured by content analysis. RESULTS: We found an association between changes in two independently assessed variables: global symptom strain and family interaction patterns. (1) When patients assessed global symptom strain as unchanged, family interaction patterns associated with headache were also assessed as unchanged by observers; (2) when patients assessed their global symptom strain as positively changed, family interaction pattern associated with headache were also assessed as positively changed by observers. CONCLUSION: These data provide empirical evidence about when to include family in treatment of pediatric headache: when rigid family interaction patterns associated with headache complicate a symptom change.

Volume, expansivity and isothermal compressibility changes associated with temperature and pressure unfolding of Staphylococcal nuclease.

We have characterized the temperature- and pressure-induced unfolding of staphylococcal nuclease (Snase) using high precision densitometric measurements. The changes in the apparent specific volume, expansion coefficient and isothermal compressibility were determined by these measurements. To our knowledge, these are the first measurements of the volume and isothermal compressibility changes of a protein undergoing pressure-induced unfolding. In order to aid in interpreting the temperature and pressure dependence of the apparent specific volume of Snase, we have also carried out differential scanning calorimetry under the solution conditions which are used for the volumetric studies. We have seen that large compensating volume and compressibility effects accompany the temperature and pressure-induced protein unfolding. Measurements of the apparent specific volume and thermal expansion coefficient of Snase at ambient pressure indicate the formation of a pre-transitional, molten globule type of intermediate structure about 10 degrees C below the actual unfolding temperature of the protein. Compared to the folded state, the apparent specific volume of the unfolded protein is about 0.3-0.5 % smaller. In addition, we investigated the pressure dependence of the apparent specific volume of Snase at a number of different temperatures. At 45 degrees C we calculate a decrease in apparent specific volume due to pressure-induced unfolding of -3.3 10(-3) cm(3) g(-1) or -55 cm(3) mol(-1). The threefold increase in compressibility between 40 and 70 MPa reflects a transition to a partially unfolded state, which is consistent with our results obtained for the radius of gyration of the pressure-denatured state of Snase. At the lower temperature of 35 degrees C, a significant increase in compressibility around 30 MPa is indicative of the formation of a pressure-induced molten globule-like intermediate. Changes in the apparent volume, expansion coefficient and isothermal compressibility are discussed in terms of instrinsic, hydrational and thermal contributions accompanying the unfolding transition.

Predicting subjective disability in chronic pain patients.

Subjective disability is considered as the variable that reflects the impact of chronic pain on a patient's life. This study examines the questions of which syndrome or patient characteristics determine subjective disability and whether there are differences between samples of patients with chronic headaches and low back pain. Direct pain variables and depression, pain coping strategies, and pain-related self-statements (including catastrophizing) are introduced into multivariate regression analyses as potential predictors of disability using a sample of 151 pain patients. Disability is not predicted by pain severity in patients with headaches or back pain. Psychological variables, especially coping strategies, are far more influential. Coping explains more variance in disability in the headache sample than in the chronic law hack pain group, whereas depression is more relevant for the degree of disability in the back pain sample. In this study, we present a critical analysis of possible interpretations of our results. We point to an overlap of concepts underlying some of the variables used: this overlap also considerably invalidates conclusions drawn from a multitude of studies done in this field, including the one presented. We strongly argue for a conceptual clarification, and consequently for the revision of assessment instruments, before further empirical work in this area is done.

[Pain therapy-integration of psychological diagnosis and therapy.]. / Zur Integration psychologischer Diagnostik und Therapie bei der Behandlung chronischer Schmerzen.

A multidisciplinary approach, acknowledged as being the best treatment strategy for a wide range of chronic pain patients, requires cooperation at least between trained professionals in the medical and the psychological disciplines. Psychological criteria are formulated to bridge persisting gaps in the interdisciplinary implementation of pain treatment strategies.

[Cancer pain: Coping and communication.]. / Krebsschmerz: Coping und Kommunikation.

Anxieties and emotional disturbances associated with cancer often cause pain therapy to be unsuccessful. When psychological support is required it is mostly aimed at supporting cancer patients in attempts to cope with their disease so as to improve the efficiency of pain therapy. In our study we focused on the barriers to cancer pain management that lie in patient's beliefs about pain and their coping behavior. A pilot study was designed to examine the subjective experience of pain and coping strategies. In a sample of 146 cancer outpatients with pain we found moderate pain intensity levels and good physical conditions (Karnofsky), but an extensive impact on mood and vegetative symptoms associated with "constant or daily pain" and/or attribution of pain to cancer. Coping was characterized by stoicism, "being brave", comparison with others and self-encouragement, but seldom by communication, requests for help or such strategies as distraction, enjoyment and relaxation. Only one third of the pain patients communicated their pain. Women and the patients who had higher pain intensity levels were more likely to suffer in silence, but those who communicated had better acceptance levels of pain intensity than those who did not. In a second study we focused on two questions. What do patients think about pain therapy? Can patients' attitudes on pain and pain management be changed by an information brochure? Selected results obtained in a sample of 72 cancer pain patients are reported. From a 30-item list of statements about pain and pain management, which were extracted from the previous interviews, three distinct types of attitudes in pain patients were derived by cluster analysis. One group of 29 patients was characterized by "non-acceptance of analgesic pain management'. With respect to medication intake, they were afraid of subjecting themselves to physical stress, of addiction and side effects and of loss of control over the disease. They hoped their pain would disappear when the tumour therapy took effect (as with acute pain) and thought they could tolerate it stoically. These patients wanted to take medication only if tumour therapy had no effect and when death was imminent. They had a pain intensity level of 5.5 VAS (without therapy). Adequate pain therapy was given to 14.3% of the "nonacceptors", significantly less (P=0.002) than to the "acceptors" (n=31) who had pain intensity levels of 7.7 VAS (without pain therapy) and had attitudes quite opposed to those of the first group. Adequate pain therapy was given to 58.6% of this group. The third group of patients (n=12) was characterized by "ambivalence toward analgesic pain management". They were similar to the acceptors insofar as they did not fear addiction and side effects of medication, but they were similar to the non-acceptors insofar as they were afraid of losing control over the disease and of putting their body under stress. They also tended to bear pain stoically. Their pain intensity level without therapy was 6.3 VAS. With respect to coping strategies, communication was found significantly less often (P=0.001) than cognitive and behavioural coping. Those patients who used cognitive coping strategies and did not communicate often received inadequate pain therapy. Those who talked about pain but did not use any other coping strategies were mostly well treated. We have designed a brochure, "What tumour patients should know about pain" directly oriented on the above pain beliefs; this is now being evaluated with reference to its educational effect.

Pain: a kaleidoscope of ideas, concepts and approaches.

The following pages contain summaries and short statements on chronic pain providing further material for reflection and debate, namely: a) synopses of recent findings on: the physiology and biochemistry of pain; the contribution of psychoneuroimmunology; b) some views on a sociology of pain; c) analysis of various concepts and approaches which consider pain as: a symptom of disease a form of behaviour a psychosomatic reaction and a social learning process a communication phenomenon a symptom of disintegrated life a disruption in the integrity of the system a signal of broken unity a breach in the wholeness of the individual; d) a holistic approach in pain therapy; e) some unanswered questions.

[Experiences with the use of pain diaries in the care of outpatients suffering from chronic pain.]. / Erfahrungen mit der Anwendung von Schmerztagebüchern in der ambulanten Versorgung von Patienten mit chronischen Schmerzen.

For the present investigation 31 out-patients suffering from chronic pain received a pain diary, that is a booklet in which they recorded their pain level on visual analogue scales and daily activities several times during a day. We used weekly interviews and the patient's records in the diary to evaluate the patient's compliance and the influence of a pain diary on the pain perception and on the physician-patient-interaction. We found that most of the patients were willing and able to use the pain diary. 30 out of 31 patients kept the diary voluntarily for an average period of 4 weeks. 70% of the patients regarded the pain diary as helpful irrespective of whether or not they considered it at the same time as burden. Only 10% reported difficulties in using the pain diary. The majority of patients (70%) noticed no change by the use of the diary in their general pain perception, about 17% reported to feel an increasing fixation on their pain, while 13% felt more distance from their pain by using a pain diary. The use of a pain diary produces a survey over the pain for a longer period than a usual consultation could present. In particular the relationship between the pain level and other recorded events and activities becomes visible. The apin data become especially clear when displayed graphically in a "pain curve". In this way therapeutic interventions can be checked whether or not they are efficient. Each patient was asked at every meeting to indicate on a separate visual analogue scale the pain level he would consider bearable. This mark was accepted by all patients as their aim for the therapy, a more realistic aim than the expectation of a complete freedom from pain. When observed over a period of at least two weeks we found this mark staying constant with half of the patients. In 23.8% the patients decreased this subjectively bearable pain level more than 1 cm, in 14.3% the level was increased. In 9.5% it varied without any clear tendency. For many patients the pain diary was an impulse for an argument with their pain and life situation. Patients from this study reported a better control over their pain and improved conciousness of their own body. As the patient plays an active part the pain diary promotes an equal cooperation between physician and patient. The new information derived from a pain diary enables both patient and physician to alter their point of view.

[Documentation of chronic pain-a seroey.]. / Anamnesen und Verlaufsprotokolle chronischer Schmerzen für die Praxis- Ein Uberblick.

This article reviews the methods currently in use for the measurement of chronic pain. The most important items for inclusion in questionnaires about the history and in pain diaries to elicit data on the time-course of pain are presented, and both the aims and the advantages and disadvantages of various strategies are discussed. The documentation of chronic pain in outpatients would allow answers to some questions concerned with medical epidemiology if practiced in a large number of therapeutic institutions, especially if the data were processed and evaluated by microcomputer.