Background The scientific acupuncture studies as part of the model project of German statutory insurance bodies aimed at evaluating the effectiveness and safety of acupuncture therapy in chronic headache, chronic back pain, and osteoarthrosis both under controlled and every-day conditions. The results serve as criteria for high-quality acupuncture. Linking an observational study with the data gathered from a survey conducted among acupuncturists, certain hints concerning features of patients, therapy and therapists could be gathered. Aim Reviewing the correlations already published by means of a homogenous indication group. Methods Combining the patient data from a prospective observational study and the data from a survey conducted among the participating acupuncturists. The patient data recorded included pain intensity, functionality in every-day situations, quality of life, and total of days with pain experienced before starting and 6 months after conclusion of therapy. The post-interventional data included overall satisfaction with the result and the incidence of side-effects. The data collected among the therapists included field of specialization, degree of qualification in acupuncture, contingent of acupuncture patients treated, as well as the application of additional naturopathic therapies. Results 1,727 patients with chronic back pain (average age 58 years, 79% female), having received treatment from 1,061 acupuncturists, were included in the present study. Regarding the treatment results, two extreme groups (445 non-responder and 261 best-responder) could be compared. Between acupuncturists with shorter (A-diploma) or longer (B-diploma) training, there was no detectable difference in the treatment success. Patients who received acupuncture from orthopaedic surgeons showed up less frequently in the group of particularly successfully treated patients. Patients treated by doctors with a high quota of acupuncture patients as well as by doctors offering additional naturopathic treatments more frequently displayed a good outcome. There is evidence indicating a less frequent occurrence of side effects in patients treated by therapists with longer training and/or more experience. Both male and female patients were more satisfied with the treatment if acupuncture was administered by a female doctor. Among male orthopaedic surgeons, the average time of contact with the patients during acupuncture treatment was remarkably short. Conclusion In spite of some methodological drawbacks, certain therapists’ features could be identified as quality indicators which could be used in the future improvement of acupuncture provisioning.
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