Skip to main content

Advertisement

TableĀ 3 Guidance for assessing risk of performance bias at different study designs

From: What are the effects of control of mosquitoes and other nematoceran Diptera using the microbial agent Bacillus thuringiensis israelensis (Bti) on aquatic and terrestrial ecosystems? A systematic review protocol

Study design Source of performance bias Reported or suspected Risk of performance bias
BA Confounding factor or time-related trend Yes High/probably high
No Low/probably low
Unclear Unclear
CI and BACI Confounding factor or contamination of study groups Yes High/probably high
No Low/probably low
Unclear Unclear
Time-related trend Yes or No Low (N/A for CI)