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. 2011 Jan 26;4:13. doi: 10.1186/1755-8794-4-13

Table 2.

Sample size estimates for GWAS of diabetic retinopathy with power estimates for the individual sites and with combined data

eMERGE site Estimated number of diabetic retinopathy cases and controls Power for GWAS, p < 10-8, MAF = .10 OR = 2.5
Marshfield 367/569 .424
Northwestern 150/1262 .243
Mayo 83/3412 .101
Group Health 324/667 .449
Vanderbilt 260/500 .270
Combined 1184/6410 .999