| | Author | HF | Controls | Weight (%) | SMD (95% CI) | | Number | Zn concentration (mean ± SD) | Number | Zn concentration (mean ± SD) |
| | Sullivan et al., 1979 | 42 | 0.74 ± 0.11 μg/ml | 37 | 0.97 ± 0.13 μg/ml | 4.09 | (, ) | | Atlihan et al., 1990 (1) | 29 | 92.9 ± 18.9 µg/100 ml | 11 | 107.5 ± 15.7 µg/100 ml | 3.55 | (, ) | | Atlihan et al., 1990 (2) | 29 | 107.4 ± 17.2 µg/100 ml | 11 | 107.5 ± 15.7 µg/100 ml | 3.62 | (, 0.688) | | Oster, 1993 | 20 | 745 ± 195 µg/l | 50 | 931 ± 178 µg/l | 4.06 | (, ) | | Golik et al., 1993 (1) | 9 | 11.5 ± 1.53 μmol/L | 20 | 16 ± 3.3 μmol/L | 3.06 | (, ) | | Golik et al., 1993 (2) | 15 | 13.2 ± 2.3 μmol/L | 20 | 16 ± 3.3 μmol/L | 3.57 | (, ) | | Cénac et al., 1996 | 35 | 0.9 ± 0.21 μg/ml | 36 | 1.17 ± 0.25 μg/ml | 4.18 | (, ) | | De Lorgeril et al., 2001 | 21 | 0.82 ± 0.12 mg/l | 18 | 0.9 ± 0.09 mg/l | 3.74 | (, ) | | Topuzoglu et al., 2003 | 54 | 81.42 ± 15.4 µg/dl | 20 | 92.51 ± 22.8 µg/dl | 4.12 | (, ) | | Kosar et al., 2006 (1) | 54 | 555 ± 104 µg/l | 30 | 620 ± 130 µg/l | 4.32 | (, ) | | Kosar et al., 2006 (2) | 26 | 568 ± 116 µg/l | 30 | 620 ± 130 µg/l | 4.1 | (, 0.111) | | Kosar et al., 2006(3) | 28 | 542 ± 92 µg/l | 30 | 620 ± 130 µg/l | 4.1 | (, ) | | Kosar et al., 2006 (4) | 24 | 565 ± 107 µg/l | 30 | 620 ± 130 µg/l | 4.06 | (, 0.087) | | Kosar et al., 2006 (5) | 20 | 543 ± 106 µg/l | 30 | 620 ± 130 µg/l | 3.96 | (, ) | | Kosar et al., 2006 (6) | 10 | 553 ± 66 µg/l | 30 | 620 ± 130 µg/l | 3.52 | (, ) | | Salehifar et al., 2008 (1) | 18 | 0.97 ± 0.25 mg/l | 27 | 1.12 ± 0.42 mg/l | 3.89 | (, 0.189) | | Salehifar et al., 2008 (2) | 3 | 1.3 ± 0.09 mg/l | 27 | 1.12 ± 0.42 mg/l | 2.31 | 0.444 (, 1.642) | | Salehifar et al., 2008 (3) | 4 | 0.95 ± 0.26 mg/l | 27 | 1.12 ± 0.42 mg/l | 2.63 | (, 0.637) | | Salehifar et al., 2008 (4) | 9 | 0.87 ± 0.24 mg/l | 27 | 1.12 ± 0.42 mg/l | 3.39 | (, 0.121) | | Salehifar et al., 2008 (5) | 2 | 1.04 ± 0.06 mg/l | 27 | 1.12 ± 0.42 mg/l | 1.87 | (, 1.243) | | Shokrzadeh et al., 2009 (1) | 30 | 1.05 ± 0.28 mg/l | 27 | 1.12 ± 0.42 mg/l | 4.13 | (, 0.323) | | Salehifar et al., 2009 (2) | 17 | 1.27 ± 0.29 mg/l | 27 | 1.12 ± 0.42 mg/l | 3.86 | 0.399 (, 1.012) | | Shokrzadeh et al., 2009 (3) | 10 | 0.95 ± 0.27 mg/l | 27 | 1.12 ± 0.42 mg/l | 3.5 | (, 0.294) | | Ghaemian et al., 2011 (1) | 38 | 24.7 ± 27.6 µg/dl | 40 | 70.9 ± 21.6 µg/dl | 4.09 | (, ) | | Ghaemian et al., 2011 (2) | 40 | 23.2 ± 16.8 µg/dl | 40 | 70.9 ± 21.6 µg/dl | 3.94 | (, ) | | Alexanian et al., 2014 (1) | 81 | 74.27 ± 15.87 µg/dl | 21 | 87.9 ± 17.85 µg/dl | 4.21 | (, ) | | Alexanian et al., 2014 (2) | 44 | 81.51 ± 19.73 µg/dl | 21 | 87.9 ± 17.85 µg/dl | 4.12 | (, 0.189) |
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