Outcome Number of studies Sample size Pooled RR(95%CI)
OACs vs. non-OAC 9 613920 0.717(0.596-0.862)
OACs vs. non-OAC in patients with CHA2DS2-VASc Score≄2 2 18076 0.834(0716-0.973)
VKA vs. non-OAC 4 514111 0.776(0.647-0.930)
NOACs vs. non-OAC 2 274723 0.614(0.266-1.418)
VKA vs. NOACs 2 220483 0.914(0.746-1.120)