Serum Zinc Ion Concentration Associated with Coronary Heart Disease: A Systematic Review and Meta-Analysis

Table 1

Baseline information. The gold standard for diagnosing CHD in the experimental group is coronary angiography.

Id	Author	Country	Years	Is the method of diagnosing disease the gold standard	Types of test specimens for zinc ions	The mean value of zinc ion concentration in the control group	The standard deviation of zinc ion concentration in the control group	Number of the control group	Mean value of zinc ion concentration in the experimental group	The standard deviation of zinc ion concentration in the experimental group	Number of the experimental group
No. 1	Meng et al. [16]	China	2021	Yes	Serum	14.77 μmol/L	2.86	1103	14.18 μmol/L	2.87	1103
No. 2	Soinio et al. [21]	Finland	2007	Yes	Serum	15.8 μmol/L	2.5	796	15.2 μmol/L	2.5	254
No. 3	Basnet et al. [22]	Nepal	2020	Yes	Serum	13.7 mg	3.3	233	13.5 mg	2.6	233
No. 4	Cebi et al. [23]	Turkey	2011	Yes	Serum	0.91 μg/dI	0.18	20	0.85 μg/dI	0.55	30
No. 5	Hasanato [24]	Saudi Arabia	2020	Yes	Serum	15 μmol/L	3.2	50	13.5 μmol/L	1.9	50
No. 6	Islamoglu et al. [25]	Turkey	2011	Yes	Serum	0.67 ng/L	0.14	34	0.61 ng/L	0.16	33
No. 7	Li et al. [26]	China	1990	Partly	Serum	20.17 μmol/L	3.97	31	14.39 μmol/L	4.44	31