“…Through research, a total of 232 published articles assessing ADRB2 polymorphisms together with asthma were found. In total, 34 studies (Gao et al, 2000;Liao et al, 2001;Xing et al, 2001;Wang et al, 2001;Dai et al, 2002;Leung et al, 2003;Lin et al, 2003;Wang et al, 2004;Gao et al, 2004;Cui et al, 2007;Ye et al, 2011;Zhang et al, 2008;Yang et al, 2012;Feng et al, 2004;He et al, 2012;Xie et al, 2008;Liu et al, 2009;Shi & Zhou 2008;Tuerxun et al, 2007;Zheng et al, 2012;Fu et al, 2011;Qiu et al, 2010;Chan et al, 2008;Wang et al, 2009;Pan et al, 2005;Liu et al, 2006;Qiu & Yin 2008;Hua et al, 2008;Li et al, 2009;Chen et al, 2014;Liu et al, 2014;Hua et al, 2016;Tian et al, 2016;Guo et al, 2016) were used in this report, which met our inclusion criteria. The publication years between 2000 and 2016 were chosen for this meta-analysis.…”