Fig. 5
Subgroup analysis of the association between restenosis and the duration of DAPT. The vertical dashed lines indicate the pooled summary estimate (95% CI) for all studies in Fig. 5 (‘More than 6 months’ subgroup, RR = 1.48, 95% CI, 1.27–1.73; I2 = 56.4%, P = 0.006, ‘Equal to or less than 6 months’ subgroup, RR = 1.53, 95% CI, 1.23–1.90; I2 = 18.2%, P < 0.05.). The area of each square is proportional to the inverse variance of the estimate. The horizontal lines indicate the 95% confidence intervals of the estimate