|
Study design
|
Experimental studies (treatment vs control)
|
Quasi-experimental studies (including concurrent controls)
|
Case studies and observational studies
|
|
Objectives/hypothesis
|
Clear relation between objectives and methodology
|
Clear relation between objectives and methodology
|
No relation between objectives and methodology
|
|
Sampling
|
Sampling method is suitable for gathering data on the population of interest
|
The method used for sampling is appropriate for data gathering on population of interest
|
Sampling method is not suitable for the population of interest
|
|
Replicates are proper (interventions are replicated)
|
Replicates are proper
|
|
Intervention and comparator areas are well-matched (soil conditions are the same)
|
Intervention and comparator areas are well-matched (soil conditions do not differ profoundly)
|
|
Confounding factors not present (both intervention and comparator sites are treated equally)
|
Confounding factors not present (both intervention and comparator sites are treated equally)
|
|
Consideration of heterogeneity/effect modifiers
|
Precisely determined/considered effect modifiers
|
Effect modifiers are considered
|
Effect modifiers not considered or determined
|
|
Statistical analysis
|
Clear description of statistical analysis and results
|
Statistical analysis and results are clear enough
|
Not appropriate statistical analysis and results
|
