Table A1.

The Modified Cochrane Collaboration’s tool for assessing the risk of bias.

Domain	Support for Judgment
Selection Bias
Use of international guidelines for the assessment and measurement of blood pressure	Describe the method used for the assessment of blood pressure and whether international guidelines have been used
Selection of Sample and control of confounding variables	Describe the method used to select the participant and to assess and control the confounding variables
Detection bias
Use of appropriate tasks for the measurement of the cognitive domains considered	Describe all measures used to the assessment of cognitive domains
Attrition bias
Incomplete outcome data	Describe the completeness of data for each main outcome, including attrition and exclusion from the analysis. State whether attrition and exclusion were reported, the numbers in each intervention group (compared with total randomized participants), reasons for attrition/exclusion were reported.
Reporting bias
Selective reporting	State how the possibility of selective outcome reporting was examined by the authors’ review and what was found.
Other bias
Other sources of bias	State any important concerns about bias not addressed in the other domains in the tool. If particular questions/entries were pre-specified in the review’s protocol, responses should be provided for each question/entry.