Background
Methods
Search strategy and selection criteria
Data extraction
Statistical analysis
Results
Description of included studies
References | Type of periodontitis | Source of controls | Geographic area(s) | Case number | Control number | Cases | Controls | HWE | |||||
---|---|---|---|---|---|---|---|---|---|---|---|---|---|
GG | GC | CC | GG | GC | CC | χ2 |
P
| ||||||
Ho, 2008 (15) | CP | HB | Taiwan | 343 | 153 | 242 | 93 | 8 | 89 | 60 | 4 | 2.77 | 0.096 |
Ho, 2008 (15) | AP | HB | Taiwan | 85 | 153 | 81 | 3 | 1 | 89 | 60 | 4 | 2.77 | 0.096 |
Sun, 2009 (16) | CP | PB | Guangdong | 150 | 143 | 119 | 29 | 2 | 119 | 21 | 3 | 2.85 | 0.091 |
Xie, 2009 (17) | CP | HB | Guangdong | 146 | 148 | 137 | 9 | 0 | 128 | 20 | 0 | 0.78 | 0.378 |
Loo, 2011 (18) | CP | PB | Sichuan | 280 | 250 | 134 | 68 | 78 | 152 | 90 | 8 | 1.50 | 0.221 |
Li, 2012 (19) | CP | PB | Sichuan | 122 | 532 | 55 | 33 | 34 | 316 | 204 | 12 | 10.24 | 0.001 |
Duan, 2012 (20) | CP | PB | Ningxia | 273 | 284 | 205 | 57 | 11 | 223 | 54 | 7 | 2.72 | 0.099 |
Meta-analysis
Analysis model | n | ORr(95%CI) | ORf(95%CI) | Ph | |
---|---|---|---|---|---|
C vs. G | Total analysis | 7 | 0.92 (0.51–1.68) | 1.34 (1.17–1.54) | 0.000 |
Hospital-based | 3 |
0.33 (0.12–0.95)
|
0.45 (0.34–0.60)
| 0.001 | |
Population-based | 4 |
1.81 (1.22–2.71)
|
1.99 (1.69–2.35)
| 0.001 | |
South China | 6 | 0.86 (0.41–1.78) | 1.36 (1.17–1.58) | 0.000 | |
CP | 6 | 1.24 (0.73–2.11) | 1.54 (1.33–1.78) | 0.000 | |
CC vs. GG | Total analysis | 6 | 2.25 (0.64–7.95) | 4.82 (3.30–7.06) | 0.000 |
Hospital-based | 2 | 0.58 (0.20–1.70) | 0.55 (0.20–1.54) | 0.441 | |
Population-based | 4 |
4.47 (1.25–15.95)
|
7.01 (4.55–10.78)
| 0.000 | |
South China | 5 | 2.33 (0.53–10.31) | 5.77 (3.78–8.81) | 0.000 | |
CP | 5 | 3.08 (0.86–1.03) | 5.53 (3.70–8.26) | 0.000 | |
CC vs. GG + GC | Total analysis | 6 | 2.50 (0.73–8.52) | 5.31 (3.64–7.74) | 0.000 |
Hospital-based | 2 | 0.76 (0.26–2.19) | 0.74 (0.26–2.07) | 0.587 | |
Population-based | 4 |
4.47 (1.21–16.44)
|
7.29 (4.77–11.15)
| 0.000 | |
South China | 5 | 2.69 (0.66–11.05) | 6.47 (4.25–9.88) | 0.000 | |
CP | 5 | 3.21 (0.90–11.41) | 5.87 (3.95–8.73) | 0.000 | |
CC + GC vs. GG | Total analysis | 7 | 0.79 (0.45–1.38) | 1.00 (0.85–1.18) | 0.000 |
Hospital-based | 3 |
0.28 (0.09–0.88)
|
0.38 (0.27–0.52)
| 0.001 | |
Population-based | 4 |
1.52 (1.24–1.86)
|
1.52 (1.24–1.86)
| 0.469 | |
South China | 6 | 0.71 (0.36–1.42) | 0.96 (0.80–1..15) | 0.000 | |
CP | 6 | 1.08 (0.70–1.65) | 1.18 (0.99–1.40) | 0.000 |