Table 3 Characteristics and variables to be extracted from included articles
Characteristics | Variables |
|---|---|
Population | Age in years; sex; primary diagnosis; medical specialty; pain history |
Intervention (parameters of TENS) | Frequency; intensity, pulse duration, modality, application area, duration of treatment; application interface; time of follow-up |
Biochemical parameters | Type of proinflammatory cytokines and evaluation of their expression in blood (level pre and post-intervention) |
Methodological information | Sample size, primary endpoint studied (inflammation), other outcomes, randomization, blinding, patient eligibility criteria. |