“…The detailed characteristics of the 42 included studies are shown in Table 1 . There were 23 cohort studies ( 19 – 21 , 26 , 27 , 31 , 32 , 36 , 39 , 40 , 42 – 45 , 49 – 52 , 55 , 57 , 58 , 61 , 62 ), 10 cross-sectional studies ( 24 , 28 , 33 , 34 , 37 , 47 , 48 , 53 , 56 , 59 ), seven case-control studies ( 25 , 29 , 35 , 41 , 46 , 54 , 60 ), and two interventional studies ( 30 , 38 ). There were 13 studies rated as Good ( 19 , 21 , 26 , 30 – 32 , 36 , 45 , 49 , 50 , 52 , 58 , 61 ), 27 as Fair ( 20 , 24 , 25 , 27 – 29 , 33 – 35 , 39 – 44 , 46 – 48 , 51 , 53 – 57 , 59 , 60 , 62 ), and two as Poor ( 37 ,…”