Fig. 4From: Data extraction and comparison for complex systematic reviews: a step-by-step guideline and an implementation example using open-source softwareThe output of the compareDF library. The colour schemes facilitate the recognition of the discrepancies and agreements between the two reviewers. A single cell is coloured if it has changed across the two datasets. The discrepancies in the values in the first and second reviewer datasets were coloured green and red, respectively. Cells that did not change across the two datasets are coloured blueBack to article page