Table 3. Stratification for the test of heterogeneity on XPD Lys751Gln based on a recessive model.

	Q-test			I2, %	τ2	OR(95%CI)	P value
	chi-squared	d.f.	p
Overall	29.83	12	0.003	59.8	0.1233	1.12(0.85–1.48)	0.410
Asians	2.19	4	0.701	0.0	0.0000	2.41 (1.69–3.43)	0.000
Caucasians	2.33	5	0.802	0.0	0.0000	0.98 (0.82–1.17)	0.803
Turkish population	4.02	1	0.045	75.1	0.4489	0.97 (0.33–2.82)	0.954
Large sample	24.05	7	0.001	70.9	0.1437	1.17 (0.84–1.64)	0.351
Small-and-moderate sample	4.68	4	0.322	14.4	0.0409	0.96 (0.61–1.51)	0.858
High quality	25.08	10	0.005	60.1	0.1138	1.20 (0.91–1.60)	0.199
Low-and-moderate quality	0.17	1	0.684	0.0	0.0000	0.61 (0.34–1.11)	0.104
High quality Asians	0.46	3	0.928	0.0	0.0000	2.54 (1.77–3.65)	0.000
High quality Caucasians	2.33	5	0.802	0.0	0.0000	0.98 (0.82–1.17)	0803
Publication before or in 2007	1.27	4	0.866	0.0	0.0000	0.89 (0.66–1.19)	0.428
Publication after 2007	24.73	7	0.001	71.7	0.1805	1.23 (0.84–1.81)	0.285
Non-cardia type	3.47	1	0.063	71.2	0.1155	2.03 (1.16–3.54)	0.013
Cardia type	1.08	3	0.781	0.0	0.0000	0.88 (0.66–1.18)	0.403
PCR-RFLP genotyping	5.93	7	0.547	0.0	0.0000	0.94 (0.68–1.29)	0.701
TagMan PCR genotyping	11.04	1	0.001	90.9	0.3883	1.67 (0.68–4.14)	0.265

Only D+L ORs (95% CI) and P values of D+L estimates provided.