Table 2.

Meta-analysis of associations between the D13 and D14 alleles of the ASPN polymorphisms and KOA risk.

Comparison	Subgroup	Type of model	Heterogeneity		Odds ratio
			I2 (%)	PH	OR	95% CI	POR
D14 versus D13	Overall	Random	61	0.004	1.10	0.90–1.36	0.32
	Caucasian	Fixed	8	0.36	1.05	0.91–1.21	0.49
	Asian	Random	67	0.01	0.98	0.78–1.23	0.88
D14 versus other alleles
	Overall	Random	77	0.00	1.30	1.00–1.70	0.06
	Caucasian	Random	78	0.00	1.26	0.91–1.73	0.15
	Asian	Random	79	0.001	1.35	0.81–2.26	0.24
D13 versus other alleles
	Overall	Random	57	0.01	0.93	0.82–1.06	0.33
	Caucasian	Random	50	0.07	0.90	0.81–1.00	0.06
	Asian	Random	67	0.01	0.98	0.78–1.23	0.88