Table 1.

Description of the PICOS criteria used to define the research question.

Parameter	Description
P—Population	Healthy or diseased adults
I—Intervention/variable of interest	Anthocyanin-rich foods or extracts or purified anthocyanins
C—Comparator	Control or placebo
O—Outcome	Vascular function as indicated by measures of arterial stiffness or vascular reactivity
S—Study design	Randomised controlled trials