Table 4. Pooled results for secondary outcomes.

Secondary outcome	Number of studies	IVUS-guided group	Angiography-guided group	RR	95% CI	p for RR	I2	p for heterogeneity
Myocardial infarction	7	114/1916	181/2465	0.8	0.61–1.06	0.12	22%	0.26
Target vessel revascularization	6	147/1972	191/2445	0.89	0.66–1.20	0.44	47%	0.09
Target lesion revascularization	3	18/442	43/445	0.43	0.25–0.73	0.002	0%	0.53
In-stent thrombosis	4	7/1197	37/1198	0.28	0.12–0.67	0.004	5%	0.37

IVUS = intravascular ultrasound; RR = risk ratio; CI = confidence interval