Table 2.

Meta-regression analysis based on publication year, ethnicity, detection method, control type, case size

Heterogeneity sources	Coefficient	95% CI		P-value
		Lower	Upper
Publication year	−0.058	−0.307	0.191	0.613
Ethnicity
African	−0.102	−2.89	2.686	0.936
Caucasian	−1.046	−2.797	0.706	0.21
Detection method
MSP	−0.578	−4.056	2.89	0.716
Pyrosequence	−1.645	−5.465	2.176	0.356
Control type	0.209	−1.24	1.658	0.752
Case size	<0.001	−0.043	0.043	0.996

Abbreviations: CI, confidence interval; MSP, methylation-specific polymerase chain reaction.