“…The pooled mean levels of apolipoprotein B were 1.06 ± 0.009 g/L in smokers and 0.98 ± 0.007 g/L in nonsmokers. The meta-analysis of apolipoprotein B levels in smokers versus nonsmokers included 40 studies and 63 estimates [23] , [24] , [27] , [28] , [29] , [30] , [32] , [34] , [35] , [37] , [38] , [39] , [40] , [41] , [42] , [44] , [45] , [46] , [48] , [49] , [50] , [51] , [52] , [53] , [54] , [55] , [56] , [57] , [58] , [62] , [70] . Increased levels of apolipoprotein B were found in smokers using the fixed-effects model (mean difference= 0.056, 95% CI: 0.053, 0.059 g/L, I 2 =95%).…”