Table 1 Characteristics of all included studies
From: Serum magnesium levels and lung cancer risk: a meta-analysis
Study, year | Country | Age (range or Mean ± SD) | Study type | Lung cancer cases | Controls | Methods of measured magnesium | |||
|---|---|---|---|---|---|---|---|---|---|
n | Female (%) | Magnesium: Mean ± SD | n | Magnesium: Mean ± SD | |||||
Cobanoglu U et al., 2010 | Turkey | 54 ± 8.29 | Case-control | 30 | 33.33 | 156.21 ± 22.21 μg/L | 20 | 185.8 ± 4.05 μg/L | Atomic Absorption Spectrophotometer measurements (UNICAM-929 spectrophotometer) |
Diez M et al., 1989 | Spain | 60 ± 7 | Case-control | 64 | 7.81 | 20.6 ± 3.2 μg/L | 100 | 21.7 ± 8 μg/L | Perkin-Elmer 5.000 atomic absorption spectrophotometer |
Jin ZJ et al., 2001 | China | 45–70 | Case-control | 40 | 7.50 | 1300 ± 390 μmol/L | 46 | 1320 ± 310 μmol/L | Atomic Absorption Spectrophotometer measurements |
Xu ZF et al., 1993 | China | 56 ± 7.5 | Case-control | 42 | 9.52 | 804.63 ± 71.29 μmol/L | 40 | 936.83 ± 93.31 μmol/L | Atomic Absorption Spectrophotometer measurements |
He WD et al., 1995 | China | 34–72 | Case-control | 143 | 39.16 | 940.88 ± 116.95 μmol/L | 50 | 871.24 ± 96.88 μmol/L | Atomic Absorption Spectrophotometer measurements |
Huang ZY et al., 1998 | China | 25–65 | Case-control | 136 | 19.12 | 1.8275 ± 0.375 μmol/L | 7101 | 0.8254 ± 0.1778 μmol/L | Atomic Absorption Spectrophotometer measurements (Japan Shimadzu-AA670/C2H2) |
Wang ZL et al., 2003 | China | 28–69 | Case-control | 50 | 40.00 | 68.29 ± 35.26 μg/L | 60 | 114.1 ± 52.12 μg/L | Atomic Absorption Spectrophotometer measurements and 721 spectrophotometer |
Du FL et al., 1996 | China | 22–73 | Case-control | 73 | 31.51 | 1100 ± 300 μmol/L | 63 | 1100 ± 100 μmol/L | Atomic Absorption Spectrophotometer measurements |
Guo XH et al., 1994 | China | 55.1 | Case-control | 26 | 26.92 | 20.88 ± 6.72 μg/mL | 26 | 18.84 ± 5.86 μg/mL | Atomic Absorption Spectrophotometer measurements (Varian Spectr AA-40p, USA) |
Wang FJ et al., 2014 | China | 17–77 | Case-control | 68 | 44.12 | 880 ± 60 μmol/L | 60 | 860 ± 90 μmol/L | Xylene blue method |
Fang JQ et al., 1998 | China | 55–65 | Case-control | 35 | 5.71 | 1.34 ± 0.35 μmol/L | 29 | 1.36 ± 0.29 μmol/L | Atomic Absorption Spectrophotometer measurements |