Table 1.
Baseline characteristics of included studies
| First author | Year | Country | Ethnicity | Sample size | Gender (M/F) | Age (years) | NOS score | ||||
|---|---|---|---|---|---|---|---|---|---|---|---|
|
| |||||||||||
| Total | AF | Non-AF | AF | Non-AF | AF | Non-AF | |||||
| Xu KL [30] | 2013 | China | Asians | 332 | 180 | 152 | 102/78 | 83/69 | 69.38 ± 4.68 | 69.32 ± 4.63 | 7 |
| Turgut O [21] | 2013 | Turkey | Asians | 162 | 81 | 81 | 84 | 78 | (38~89) | 6 | |
| Targher G [5] | 2013 | Italy | Caucasians | 702 | 617 | 85 | 379 | 323 | 65 ± 13 | 75 ± 9 | 8 |
| Zhao KJ [29] | 2012 | China | Asians | 260 | 83 | 177 | 49/34 | 88/89 | 68.51 ± 8.05 | 64.28 ± 8.34 | 6 |
| Wang XP [22] | 2011 | China | Asians | 89 | 40 | 49 | 18/22 | 24/25 | (36~72) | (35~75) | 5 |
| Johansen OE [8] | 2008 | China | Asians | 154 | 46 | 108 | 34/12 | 73/35 | NR | NR | 5 |
M: male; F: female; NOS: newcastle-ottawa scale; AF: atrial fibrillation; NR: not reported.