Evidence mapping and benefit assessment
For evidence mapping, a total of 85 RCTs on non-drug and drug-based treatment options were identified on the basis of a current, high-quality systematic overview. However, in 77 of these studies, catalogs of criteria for diagnosing PEM as a component that is considered mandatory today were not used, nor was the percentage of the respective population with PEM reported. It is therefore doubtful to what extent patients with ME/CFS actually took
part in these studies. Evidence mapping was therefore limited to the remaining 8 studies. From these studies, statements could be made on the 7 interventions cognitive behavioral therapy (CBT), activation therapy (GET), self-management (pacing), lightning process, vitamin D, valganciclovir and rituximab, especially in comparison to standard care. Only for CBT and GET were there statistically significant effects in favor of the intervention compared to standard care in 2 studies each. Separate benefit assessments were carried out for these two interventions.
For patients with mild to moderate ME/CFS severity, the benefit assessments based on 2 randomized studies for a short and medium-term period provided an indication (weakest reliability) of a benefit of CBT compared to standard (specialist) medical care (SMC) determine. There is no indication of a benefit of CBT compared to SMC for a long-term period. A benefit statement for the use of CBT in patients with a higher degree of ME/CFS is not possible due to the lack of data.
In summary, it was not possible to reliably weigh up the benefits and harms of GET for the comparison of GET versus SMC for patients with mild to moderate ME/CFS severity. Although the available study data indicate advantages of GET for individual endpoints, the risk of serious side effects cannot be conclusively assessed. On the one hand, this risk was highlighted in the hearing on the preliminary report, although it remained unclear whether these reports refer to improper application of the GET. On the other hand, the data collected in the available studies are not sufficiently meaningful to rule out a relevant disadvantage due to serious side effects of GET. A benefit statement for the use of GET in patients with a higher degree of ME/CFS is not possible due to the lack of data.