Table 4. Pooled results for 30 case-control studies .

Study	Year	OR	[95% Conf. Interval]		% Weight
Myocardial infarction			Lower	Upper
N. Sarrafzadeh (2001)	2001	13.219	5.096	34.292	3.05
B. Rahnema (2001)	2001	3.400	1.727	6.694)	3.54
F. Jalali (2003)	2003	0.951	0.567	1.595	3.80
H. Bazazi (2009)	2009	3.035	1.383	6.661	3.35
Z. Khodai (2010)	2010	7.765	5.829	10.344	4.09
Z. Azarkar (2011)	2011	1.788	0.891	3.590	3.51
H. Honarmand (2012)	2012	2.024	0.956	4.283	3.41
N .Dehghan (2015)	2012	2.579	0.944	7.049	2.96
F. Raygan (2006)	2006	0.564	0.218	1.459	3.06
Sub-total (D+L pooled OR)	-	2.609	1.313	5.185	30.75
Coronary Heart Disease	-	-	-	-	-
N. Sarrafzade (2008)	2008	0.829	0.219	3.136	2.41
A. Jafarzadeh (2010)	2010	4.643	1.880	11.467	3.14
F. Rahimi (2001)	2001	0.479	0.267	0.860	3.69
M. AghaJani (2002)	2002	0.897	0.478	1.683	3.62
M.A .Bahar (2004)	2004	1.663	1.019	2.712	3.84
A .Amrai (2006)	2006	0.598	0.280	1.278	3.40
A.H .Faghihi (2007)	2007	1.692	1.036	2.764	3.84
A. Pourya (2007)	2007	2.750	0.934	8.100	2.83
H. Bazazi (2008)	2008	2.126	0.982	4.600	3.37
Y. Nozari (2009)	2009	2.316	1.055	5.085	3.35
S. Davoudi (2010)	2010	1.034	0.543	1.971	3.59
H. Mirzababai (2010)	2010	3.435	2.443	4.831	4.03
M. Rogha (2012)	2012	1.582	0.715	3.500	3.33
S. Sayyah (2012)	2012	4.889	1.809	13.211	2.98
N .Fouladi (2012)	2012	1.917	1.358	2.708	4.03
M. Khademiansari	2009	2.173	1.204	3.924	3.68
J .Vafaeimanesh (2014)	2014	2.471	1.156	5.279	3.40
Sub-total (D+L pooled OR)	-	1.708	1.264	2.310	58.53
Cardiac syndrome X	-	-	-	-	-
R. Eskandarian (2004)	2004	11.455	2.167	60.559	1.94
R. Eskandarian (2006)	2006	21.000	4.451	99.082	2.09
S.M. Mohammadzadeh.	2009	5.726	2.701	12.138	3.41
Y. Rasmi (2012)	2012	9.036	3.966	20.584	3.28
Sub-total (D+L pooled OR)	-	8.237	5.003	13.562	10.72
Overall (D+L pooled OR)	-	2.351	1.715	3.221	100.00