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Table 2 Planned variables to be extracted in the scoping review

From: Clinical applications of palmitoylethanolamide in pain management: protocol for a scoping review

General study details Study ID number, lead author, title, journal, year of publication, type of publication, information source
Study characteristics Study design, study duration, pilot/feasibility study (y/n), number of study arms, covariates (definition and measurement
Participants 1. Total number, setting, inclusion and exclusion criteria
2. Participant characteristics at baseline: for each study, average age (years, mean and standard deviation [SD]), sex (%), country, and time since diagnosis (or time since treatment, if treatment was completed)
Interventions/exposures and comparators 1. Total number of intervention/exposure and comparison groups and number of participants in each group
2. For each intervention/exposure and comparison group: intervention/exposure/comparison, duration of intervention/exposure, who and how assessed, and results of assessment
Outcomes The approach used in the study for assessing pain intensity including categorical scales (e.g., mild, moderate, severe), numerical rating scales (NRS), visual analog scales (VAS), and well-validated verbal scales (eg, the Descriptor Differential Scale).
Results For each quantitative outcome: sample size, number of missing participants, reasons for loss to follow up, summary
data for each group (2 × 2 table for dichotomous data, means and SDs for continuous data), estimate of effect for the difference between groups (or change in baseline and final scores for single-arm studies), confidence intervals, and p value