Melatonin against Myocardial Ischemia-Reperfusion Injury: A Meta-analysis and Mechanism Insight from Animal Studies

Table 6

Metaregression of pooled estimates of infarct size.

Covariates	Infarct size
	Coefficient	95% CI	value
Sample size	2.360435	0.3001453, 4.420724	0.208
Species	-5.111393	-17.30782, 7.085032	0.382
Study type	2.456891	-9.851739, 14.76552	0.673
State	4.689403	-0.6606213, 10.03943	0.081
Route of administration	0.5208883	-4.255456, 5.297233	0.817
Duration of reperfusion	0.2287274	-3.982206, 4.439661	0.908
Timing regimen of pretreatment	3.072655	-0.4711795, 6.61649	0.084