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Background: In palliative care, the focus of treatment is on controlling the patient's symptoms. To achieve this, drugs with addictive potential are often used. This can lead to addiction problems, as palliative care patients are surviving longer these days than they did a decade ago.

Aims: This study investigates whether drug misuse and substance abuse are perceived as a problem in specialised outpatient palliative care teams.

Materials and methods: A cross-sectional questionnaire survey was conducted among all German specialised outpatient palliative care teams (n = 366). Data were analysed descriptively.

Results: A total of 129 palliative care teams (35.2%) participated in the survey. Of these, 49.6% stated that an estimated 1-5% of their patients suffer from medication dependency and 65.9% estimate that 1-5% of their patients have drug abuse issues. In all, 69.8% of palliative care teams do not screen their patients for the presence of addiction, while 3.1% do so regularly. If an addiction problem is present, 65.9% of the teams do not take any action.

Conclusion: According to the available data, addiction is not considered a problem in German palliative care. However, it should be noted that almost no palliative care team screens patients for the presence of addiction, although more than half of the teams estimate that at least some patients have an addiction problem. Further research is needed here, as new therapies may help palliative care patients to live longer. It would be important for the development of palliative care and the quality of life of those affected to evaluate how to protect patients from iatrogenically induced substance abuse.

To enable state-of-the-art diagnosis, therapy and monitoring of headache disorders, comprehensive history taking is necessary and can be time-consuming. This is facilitated substantially if the patient gathers the needed information beforehand, using a specialized questionnaire. To this end, experts of the German Migraine and Headache Society (DMKG) have developed the DMKG headache questionnaire. It assesses central information such as headache frequency, characteristics, accompanying symptoms and medication, as well as comorbidities and validated scales for psychological cofactors, disability and quality of life. The complete version for a first visit is complemented by a shorter version for follow-up visits and a specialized cluster headache module. For headache care professionals, the DMKG headache questionnaire is free after registration ( https://www.dmkg.de/dmkg-kopfschmerzfragebogen ). It is available for a printout or as fillable PDF and can be combined with the included PDF headache diary or with the DMKG-App (smartphone headache diary). A digital version is in the planning. The DMKG headache questionnaire is an important step towards quality assurance of headache care in Germany.

Complex regional pain syndrome (CRPS) is often associated with severe mental impairments. Initial pain-related fears in particular appear to be negative predictors for long-term therapy results. Procedures for cognitive behavioral therapy are an important component of treatment. The psychotherapy of CRPS consists of various elements that are implemented in the different phases of treatment. In the beginning the focus is on targeted psychoeducation. In the following activation phase body awareness exercises are accompanied by occupational and physiotherapeutic treatment in order to improve the perception of individual maximum loads. Behavioral analyses are used to uncover dysfunctional coping patterns, such as a fear avoidance coping strategy. In this case the use of graded activity treatment approach is indicated, in which the activity level is gradually increased. In the transfer phase psychotherapy supports affected patients in (re)designing their professional and private environments.

To evaluate the quality of care, particularly in the case of new forms of healthcare interventions, the healthcare services to be provided are defined and documented in advance. The presented explanatory sequential mixed methods design combines quantitative and qualitative data collection and the analysis enables a deeper understanding of a new healthcare intervention. Using the example of the POET-Pain project, which investigates the effect of a perioperative transitional pain service (TPS), the methodological application of the explanatory sequential mixed methods design is demonstrated in order to present the structural and process evaluation of the new healthcare intervention (in this case TPS) and to understand its influence on the quality of care. The mixed methods design presented enables the results of the quantitative phase to be interpreted and expanded in depth using qualitative data, which leads to a comprehensive understanding of the subject matter (second pillar of health services research).

Health services research looks at a form of care under contextual conditions. Often, and especially in the treatment of recurrent or chronic pain, these forms of care are complex interventions. Ensuring internal validity for subsequent interpretability of the results achieved as an essential requirement for studies in health services research therefore presents researchers with the challenge that they have to develop complex study protocols and implement and monitor them in clinical care. By its very nature, interdisciplinary multimodal pain therapy (IMST) involves multimodal interventions in an interdisciplinary care setting. In the reality of care, contextual factors for the effectiveness and feasibility of IMST are of great importance. On the one hand, health services research provides appropriate recommendations for the planning, implementation and evaluation of studies on complex interventions under contextual conditions, which can be of great importance for further research into the effectiveness of IMST. On the other hand, experience from interdisciplinary pain research can also help to successfully plan and conduct studies on complex interventions. This article introduces the understanding of interdisciplinarity (and interprofessionalism) in pain medicine and research, outlines possible key points for study planning and implementation using the example of two health services research studies and concludes by discussing gaps in research on interdisciplinary collaboration in pain medicine and research.