Sensitivity and Subgroup Analyses
A sensitivity analysis excluding studies of low quality
was planned, but was not conducted because 4 of the
5 included studies were of low quality, scoring ≤ 2 on
a validated quality scale.14 The results of the primary
analyses were supported by the subgroup analyses done
in studies20,24 with a mean INR > 3.0 (RR = 0.50, 95% CI
0.21–1.68; p = 0.21; I2 = 0%). Results from the subgroup
analyses on studies20,23,24 that used antifibrinolytic agents
were also not significant (RR = 0.65, 95% CI 0.36–1.19;
p = 0.16; I2 = 0%).