Table 1.

Frequencies of Deletions at 15q11.2 in Schizophrenia Cases and Controls Stratified by Platforms

						CMH
	Total	Deletion	Deletion (%)	OR (95% CI)	P (2 Sided)	OR (95% CI)	P	Breslow-Day P
Schizophrenia
RT-PCR	1402	7	0.50
Chip (500K)	155	0	0
Chip (6.0)	501	5	1.00
Control				3.2 (1.2–8.5)	.026	4.45 (1.36–14. 60)	.014	.13
RT-PCR	258	0	0
Chip (500K)	187	1	0.53
Chip (6.0)	2830	5	0.18

Note: CMH, Cochran-Mantel-Haenszel; RT-PCR, real-time PCR.