IJCS | Volume 32, Nº2, March/April 2019

169 Figure 3 - Bias risk of selected studies. Chua et al. 2010 [15] G. Essilfie et al. 2016 [17] J.H Chen et al. 2006 [14] Jiao W et al. 2015 [16] Rachel E et al. 2007 [13] Srivastava et al. 2015 [10] T.S. Chen et al. 2014 [11] Yunyun et al. 2014 [12] Lei & Bin Differences of risk factors in young AMI patients Int J Cardiovasc Sci. 2019;32(2)163-176 Review Article ranging from 64.7% to 94.8%, while the proportion of male patients seemed to decrease in older AMI patients. Several studies reported that chest pain is the most frequent symptom in youngAMI patients, 22 while “silent” AMI tends to be more frequent in older patients. 23 Our study revealed that there was no significant difference in the rate of chest pain between young and older patients with AMI. Data from the meta-analysis showed that the all-cause mortality rate of young individuals after AMI is significantly lower than that of older people, which is in line with previous studies. 24-26 Although young AMI patients had better long-term survival than older AMI patients, they fared worse than their age-matched contemporaries in the general population. 27 Our data analysis suggested that single-vessel coronary artery disease was more common in young AMI patients than in older ones, while multiple-vessel coronary artery disease was less prevalent in young