Forest plot for objective response rate after yttrium-90 radioembolization and transarterial chemoembolization. Pooled analyses do not revealed a statistically significant increase in odds ratio for tumor objective responses after Y90RE with respect to TACE (OR = 1.22, 95%CI: 0.69-2.16, P = 0.50). There was, however, evidence of heterogeneity across these studies (P = 0.004; I² = 67%), mainly due to some outlier studies. Y90RE: Yttrium-90 radioembolization; TACE: Transarterial chemoembolization; OR: Odds ratio.