TABLE 3. Summary statistics from fitting meta-regression in the best model.
Fixed effect parameter estimates:
Variables	OR (95% CI)			P
Source of population
Community-based	1
Clinical-based	1.33 (0.90-1.98)			0.16
Diagnostic test
Serum	1
Others	0.66 (0.45-0.96)			0.032
ELIZA kits
Domestic	1
Foreign	1.02 (0.73-1.42)			0.91
Research year
Earlier than 2000	1
Later than 2000	0.78 (0.57-1.06)			0.11
Approximated significance of smooth terms:
	Estimated degree of freedom	Reference degree of freedom	Chi square	P
Birth year	7.4	8.2	4255	< 0.00001
Random effect parameter estimates:
Study ID	34.8	38.0	1910	< 0.00001