This systematic review analyzed twenty-one articles to understand how systemic inflammation acts as a bridge between certain factors and musculoskeletal pain. The researchers looked specifically at sleep disturbances, obesity, and psychological factors in people with conditions like osteoarthritis.
The study found that systemic inflammation plays a small but significant role in connecting sleep problems to pain and linking obesity to osteoarthritis. However, the data did not show a consistent mediating effect for psychological factors on pain.
Researchers noted that for psychological factors, systemic inflammation appears to act as an interacting variable rather than a direct mediator. Because the current research relies on cross-sectional data, it is unclear if these relationships are truly causal. Longitudinal studies are essential to confirm these mechanisms and evaluate the clinical significance of targeting inflammation in pain management.
Readers should take away that while inflammation connects some physical factors to pain, the picture for psychological factors is more complex. More research over time is needed before these findings change how pain is managed in practice.