Association of common polymorphisms in known susceptibility genes with rheumatoid arthritis in a Slovak population using osteoarthritis patients as controls

Table 3 Power analysis of SNP markers

SNP	Published OR^a	Published MAF in controls	Ref	Current study's MAF in controls	Power^b
rs2476601	1.98	0.10	[4]	0.108	94.5%
rs7574865	1.27	0.22	[5]	0.202	35.9%
rs10499194	0.75	0.21 to 0.31	[6]	0.315	53.1%
rs6920220	1.22	0.21 to 0.22	[7]	0.154	23.4%
rs3761847	1.32	0.37 to 0.45	[8]	0.387	57.0%
rs10818488	1.26	0.44	[9]	0.390	44.4%

OR = odds ratio; MAF = minor allele frequency; Ref = reference; SNP = single nucleotide polymorphism.
^a combination of initial finding and replication (when available) in the cited study; effects from minor allele.
^b Power was calculated for published OR and MAF in controls from the present study (Table 4) with 520 cases and 303 controls assuming a one-tailed P = 0.05.