Cardiology Research and Practice

Research Article

The Clinical Effects of Intravascular Ultrasound-Guided Percutaneous Coronary Intervention in Patients with Chronic Total Occlusion: A Meta-Analysis

Table 1

Characteristics of included studies.


Study	Year	Study design	IG/CG	Sample size, n	Age, y	Males, %	Hypertension, %	Diabetes,%	Dyslipidemia, %	Smokers, %	Follow-up

Kalogeropoulos et al. [16]	2021	Observational	IG	182	66.5 (57–72.3)	83.5	69.8	22.5	83.5	25.8	49 months (33.0–67.0)
Kalogeropoulos et al. [16]	2021	Observational	CG	182	66.0 (58.0–72.0)	84.6	70.3	22.0	80.8	24.2	49 months (33.0–67.0)

Vemmou et al. [17]	2020	Observational	IG	344	64.9 ± 9.8	82.2	92.0	50.4	93.5	24.7	141 days (30–365)
Vemmou et al. [17]	2020	Observational	CG	578	64.8 ± 9.7	82.8	89.9	51.6	94.8	20.5	141 days (30–365)

Kim et al. [18]	2015	RCT	IG	201	61.0 ± 11.1	80.6	62.7	34.8	NR	35.3	12 months
Kim et al. [18]	2015	RCT	CG	201	61.4 ± 10.1	80.6	63.7	33.8		34.3	12 months

Tian et al. [19]	2015	RCT	IG	115	67 ± 10	88.7	74.8	29.6	21.9	39.1	24 months
Tian et al. [19]	2015	RCT	CG	115	66 ± 11	80	70.4	27	27.8	39.1	24 months

Hong et al. [20]	2014	Observational	IG	201	62 ± 11	77	58	30	42	29	12 months
Hong et al. [20]	2014	Observational	CG	201	62 ± 12	77	60	31	43	31	12 months

IG, intravascular ultrasound-guided group; AG, angiography-guided group; RCT, randomized controlled trial; NR, not reported. Values are presented as mean ± SD or interquartile range.