association study confusion

lta42

Registered Member
hi all,

i'm trying to include some population genetics information in a paper i'm currently writing and i've come across a problem with a paper i'd like to use.

the pubmed ID (PMID) is: 16804517


Now for my two questions:

1.) what is the difference between relative risk (RR) and genotype relative risk (GRR)?

2.) what do the numbers under the different models in table 2 mean? why does recessive model have infinity for each study included in the meta-analysis?

i'm thinking the values i asked about above describe the likelihood of each model but how do i know which ones are significant and which ones are not
 
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