Table 2. Characteristics of study populations in qualified studies.
| Author (year) | Age, yr | Males, % | BMI, kg/m2 | Smoking | SBP, mmHg | DBP, mmHg | sRAGE, pg/ml | esRAGE, pg/ml |
| Kirbis (2004) | 59.3/66.9 | 64.9/43.2 | 28.7/27.8 | 44/14.1 | 146/145 | 83/85 | NA | NA |
| Falcone (2004) | 61.8/59.6 | 79.4/77.4 | 26.1/24.9 | 73.7/45.2 | NA | NA | NA | NA |
| dos Santos (2005) (Caucasian) | 61.8/62.4 | 55.93/40.23 | 27.9/28.3 | NA | NA | NA | NA | NA |
| dos Santos (2005) (African) | 59.5/58.7 | 41.33/25 | 28.7/28.6 | NA | NA | NA | NA | NA |
| Falcone (2005) | 64.1/63.2 | NA | 25.7/25.6 | 49.09/31.1 | NA | NA | 966/1335 | NA |
| Hofmann (2005) (MI) | NA | NA | NA | NA | NA | NA | NA | NA |
| Hofmann (2005) (CAD-diabetes) | NA | NA | NA | NA | NA | NA | NA | NA |
| Hofmann (2005) (CAD+diabetes) | NA | NA | NA | NA | NA | NA | NA | NA |
| Zee (2006) | NA | NA | NA | NA | NA | NA | NA | NA |
| Yoon (2007) | 55.73/53.18 | NA | 25.01/23.41 | 84.9/77.3 | 119.86/114.16 | 77.13/75.84 | NA | NA |
| Lu (2008) (−restenosis) | 67/61 | NA | NA | 29.6/ | 140/ | 83/ | NA | 220/480 |
| Lu (2008) (+restenosis) | 65/61 | NA | NA | 33.7/14.7 | 137/137 | 81/80 | NA | 160/300 |
| Mulder (2008) | 64.7/63.4 | 78/72 | 27.7/25.5 | 68/72 | NA | NA | 1373/1299 | NA |
| Kucukhuseyin (2009) (+diabetes) | 61.42/57.96 | 42/49 | 27.48/25.52 | 40.7/49 | 135.59/123.6 | 85.13/76.2 | NA | NA |
| Kucukhuseyin (2009) (−diabetes) | 58.42/57.96 | 21/49 | 25.81/25.81 | 77.1/49 | 127.3/123.6 | 79.8/123.6 | NA | NA |
| Lu (2009) (−diabetes) | 64.8/56.3 | 74.16/49.57 | NA | 30.3/16.8 | 130/127 | 79/79 | NA | NA |
| Lu (2009) (+diabetes) | 66.5/62.8 | 68.90/36.09 | NA | 26.9/12.3 | 137/135 | 79/79 | NA | NA |
| Mahajan (2009) | 44.4/41.6 | 81/67.5 | 22.68/22.55 | 47/38 | 125.47/121.95 | 81.65/77.5 | 892.39/1611.9 | NA |
| Peng (2009) (+diabetes) | 64/63 | 63/58 | 25.41/25.65 | 41.6/25.1 | 136/135 | NA | NA | 270/290 |
| Peng (2009) (−diabetes) | 64/63 | 63/58 | 25.41/25.65 | 41.6/25.1 | 136/135 | NA | NA | 270/290 |
| Yan (2009) (+diabetes) | 66.2/62.3 | 70.19/45 | NA | 30.5/20 | 137/136 | 80/81 | 673.6/473.6 | 230/290 |
| Yan (2009) (−diabetes) | 64.1/58.6 | 72.48/53.03 | NA | 35.6/13.6 | 128/123 | 79/75 | 669.8/759.6 | 390/470 |
| Pu (2009) | 67.06/63.41 | 68.91/36.09 | NA | 26.89/12.25 | 137.19/135.22 | 79.16/79.25 | NA | 220/310 |
| Gao (2010) (−hypertension) | 60.8/61 | 74.3/42.4 | NA | NA | 120/118.3 | 72.7/71.7 | NA | NA |
| Gao (2010) (+hypertension) | 63.5/60.6 | 69/49.5 | NA | NA | 146.2/156 | 82.4/88.2 | NA | NA |
| McNair (2010) | NA | NA | NA | NA | NA | NA | 910.5/1302.5 | NA |
| McNair (2010) (+restenosis) | 61.5/60 | NA | 25/25 | NA | 148/125 | 74/78 | 610.6/1287 | NA |
| McNair (2010) (−restenosis) | 66.1/60 | NA | 29/25 | NA | 153/125 | 70/78 | 1143.8/1287 | NA |
| Xie (2010) | NA | NA | NA | NA | NA | NA | NA | NA |
| Hou (2011) | 57.7/58.2 | 78.15/77.34 | NA | 61.34/33.2 | NA | NA | NA | NA |
| Boiocchi (2011) | 59/62 | 83/64 | 26.1/25.6 | NA | NA | NA | NA | NA |
| Cai (2011) (CAD) | 65.5/61 | 58.3/53.8 | 25.4/25.5 | 25.1/17.1 | 132.5/130.2 | 78.9/78.6 | 691.53/652.55 | NA |
| Cai (2011) (MI) | 65.9/61 | 75.7/53.8 | 25/25.5 | 43.1/17.1 | 128.9/130.2 | 76.3/78.6 | 724.01/652.55 | NA |
| Park (2011) (+diabetes) | 64.2/62.2 | 50/50 | 23.8/24.9 | 44.4/27.8 | NA | NA | 610/450 | NA |
| Park (2011) (−diabetes) | 64.2/62.2 | 50/50 | 23.8/24.9 | 44.4/27.8 | NA | NA | 600/370 | NA |
| Peng (2011) | 68/64 | 63/53 | 25/25.7 | 24.9/25.9 | 139/137 | 78/79 | NA | 260/310 |
| Lu (2011) | 63.7/61.8 | 65.18/58.03 | 24.3/24.2 | 48.1/38.4 | NA | NA | NA | NA |
| Aydogan (2012) | 60.02/58.1 | NA | 25.92/25.52 | NA | 131.01/122.34 | 82.08/75.74 | NA | NA |
| Selejan (2012) | NA | NA | NA | NA | NA | NA | 122.15/125.68 | NA |
Abbreviations: NA, not available; BMI, body mass index; SBP, systolic blood pressure; DBP, diastolic blood pressure.