Interestingly, a follow-up analysis revealed strong evidence for a sex*genotype interaction at the CHRNB3 and CHRNA10 SNPs. There was no evidence for association between sex and “dizziness” (data not shown), so this interaction is also a novel finding. Here we see evidence that the association with “dizziness” is observed only in males, and not in females. It will be important to try to replicate this result in other samples.
