Meta-analyses on ischemic stroke risk in FVL carriers (heterozygotes + homozygotes).

Studies are listed according to their weight. Adults, risk of IS in adults only; chi-square test for heterogeneity, P = .54; test for overall effect, P = 1.00. Children, risk of IS in children only; chi-square test for heterogeneity, P = .81; test for overall effect, P < .000 01.