Fig. 7
Subgroup analysis of the association between restenosis and types of lesion vessels. The vertical dashed lines indicate the pooled summary estimate (95% CI) for all studies in Fig. 7 (‘Coronary’ subgroup, RR = 1.44, 95% CI, 1.27–1.64; I2 = 57.8%, P = 0.001, ‘Peripheral’ subgroup, RR = 0.75, 95% CI, 0.33–1.74.). 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