Effects of Preoperative HbA1c Levels on the Postoperative Outcomes of Coronary Artery Disease Surgical Treatment in Patients with Diabetes Mellitus and Nondiabetic Patients: A Systematic Review and Meta-Analysis

Table 1

Baseline characteristics of the included studies.

No.	Study design	Type of cardiac surgery	Type of diabetes	Follow-up time	Sample size	Number of patients in exposure group	Number of patients in controlled group	Preoperative HbA1c level in exposure group (%)	Preoperative HbA1c level in controlled group (%)
Nicolini et al. 2018 [37]	Cohort study	CABG	DM	NR	942	384	548	<7.0	≥7.0
Narayan et al. 2017 [36]	Retrospective study	CABG	DM	NR	3045	1178	1867	<6.5	≥6.5
Ramadan et al. 2017 [39]	Cohort study	CABG	T1DM, T2DM	1 y	80	40	40	≤7.0	>7.0
Hwang et al. 2017 [29]	Cohort study	PCI	T2DM	5.4 y	980	489	491	<7.0	≥7.0
Kuhl et al. 2016 [33]	Cohort study	CABG	T2DM	y	6313	2771	3542	≤7.0	>7.0
Finger et al. 2016 [26]	Cohort study	CABG	DM	NR	531	474	57	≤7.0	>7.0
Ümit et al. 2015 [23]	Cohort study	CABG	DM	NR	120	60	60	<7.0	≥7.0
Santos et al. 2015 [40]	Prospective study	CABG	T1DM	2 y	96	38	58	≤7.0	>7.0
Kowalczyk et al. 2015 [32]	Cohort study	PCI	New DM	2 y	306	173	133	≤7.0	>7.0
Nystrom et al. 2015 [38]	Cohort study	CABG	T1DM	4.7 y	766	67	697	≤7.0	>7.0
Subramaniam et al. 2014 [43]	Cohort study	CABG	DM	NR	1461	1003	458	<6.5	≥6.5
Biskupski et al. 2014 [24]	Cohort study	CABG	T2DM	NR	350	195	155	<7.0	≥7.0
Twito et al. 2013 [45]	Cohort study	CABG, PCI	New DM	7 y	2994	2191	803	<7.0	≥7.0
Strahan et al. 2013 [42]	Prospective study	CABG	DM	NR	712	265	447	<7.0	≥7.0
Kassaian et al. 2012 [30]	Cohort study	PCI	DM	1 y	703	291	412	≤7.0	>7.0
Tsuruta et al. 2011 [44]	Cohort study	CABG	DM	y	306	115	191	<6.5	≥6.5
Knapik et al. 2011 [31]	Cohort study	CABG	DM	NR	735	453	282	≤7.0	>7.0
Sato et al. 2010 [41]	Cohort study	CABG	T2DM	30 days	130	61	69	<6.5	>6.5
Matsuura et al. 2009 [35]	Retrospective study	CABG	DM	y	101	47	54	<6.5	>6.5
Lemesle et al. 2009 [34]	Cohort study	PCI	DM	1 y	952	429	523	≤7.0	>7.0
Halkos et al. 2008 [27]	Cohort study	CABG	DM	5 y	1285	538	747	<7.0	≥7.0
Halkos et al. 2008 [28]	Cohort study	CABG	DM	NR	1240	516	724	<7.0	≥7.0
Nicolini et al. 2018 [37]	Cohort study	CABG	Non-DM	NR	1664	1519	145	<7.0	≥7.0
Narayan et al. 2017 [36]	Retrospective study	CABG	Non-DM	NR	1633	1298	335	<6.5	≥6.5
El-sherbiny et al. 2015 [25]	Prospective study	PCI	Non-DM	0.5 y	60	27	33	<6.5	≥6.5
Halkos et al. 2008 [28]	Cohort study	CABG	Non-DM	NR	1240	1759	90	<7.0	≥7.0

NR: not reported.