Quality of Life Research Center

Resolution of the Expert Council “Non-steroidal anti-inflammatory drugs in the treatment of non-specific back pain and radiculopathy in the 2026 RASP guidelines”

In June 2025, an Expert Council of the Russian Association for the Study of Pain (RASP) was held. Specialists discussed the role of nonsteroidal anti-inflammatory drugs (NSAIDs) in the treatment of nonspecific (musculoskeletal) lower back pain. The meeting presented data from stu...

Tree-based structural equation model for assessing measurement invariance in patient-reported outcome measures

Evidence of measurement invariance (MI) is essential to ensure that scores based on patient-reported outcome measures (PROMs) are comparable across groups or over time. Conventional methods for evaluating MI in PROMs are mostly group-based methods that require that relevant diffe...