Comparison of platelet reactivity between prasugrel and ticagrelor in patients with acute coronary syndrome: a meta-analysis

Table 2 Quality assessment of the included cohort studies^a

Cohort	Representativeness of the exposed cohort	Selection of the unexposed cohort	Ascertainment of exposure	Outcome of interest not present at start of study	Control for important factor or additional factor^b	Outcome assessment	Follow-up long enough for outcomes to occur	Adequacy of follow-up of cohorts^c	Total quality scores
Alexopoulos 2014 [8]	☆	☆	☆	☆	☆	☆	☆	☆	8
Dillinger 2014 [13]	☆	☆	☆	☆	☆	☆	☆	☆	8
Kerneis 2015 [15]	☆	☆	☆	–	☆	☆	☆	☆	7
Yudi 2016 [21]	☆	☆	☆	☆	–	☆	–	–	5

^a A study could be awarded a maximum of one star for each item except for the item Control for important factor or additional factor
^b A maximum of 2 stars could be awarded for this item. Studies that controlled for cardiovascular disease received one star, whereas studies that controlled for other important confounders such cancer received an additional star
^c A cohort study with a follow-up rate > 75% was assigned one star

ISSN: 1471-2261