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Table 6 Critical appraisal criteria to assess studies in the full text stage

From: What are the effects of even-aged and uneven-aged forest management on boreal forest biodiversity in Fennoscandia and European Russia? A systematic review protocol

Factor Low Medium High
Study design Experimental studies (includes also quasi-experimental studies) Observational studies Case studies
Sampling Large sample size Sampling method suitable for the population of interest Properly conducted randomisation of study areas Random sampling of study subjects Control and intervention areas matched Small to medium sample size Sampling method suitable for the population of interest Control and intervention areas comparable based on their ecological characteristics Sampling method not suitable for collecting data on the population of interest
Accounting for heterogeneity and potential effect modifiers Effect modifiers identified, and data collected on them Effect modifiers identified and considered in relation to the results Effect modifiers not identified or considered
Data analysis methods Methods appropriate Methods appropriate Methods not appropriate