Table 2. Meta-regression analysis.
| Heterogeneity sources | Coefficient | 95%CI | P | |
|---|---|---|---|---|
| Lower | Upper | |||
| Races | −1.22 | −2.58 | 0.14 | 0.08 |
| Control types | −0.19 | −1.46 | 1.07 | 0.76 |
| Methods | ||||
| MSP | −1.78 | −5.29 | 1.73 | 0.32 |
| Q-MSP | −3.42 | −7.19 | 0.35 | 0.08 |
| Case sample size | 0.38 | −1.02 | 1.78 | 0.59 |
Races: Asians and Caucasians; Control types: autologous control and heterogeneous control; Methods: MSP (methylation-specific polymerase chain reaction), Q-MSP (quantitative methylation-specific polymerase chain reaction) and BSP (bisulfite sequencing polymerase chain reaction); Case sample size: <40 and ≥40.