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. Author manuscript; available in PMC: 2017 Oct 3.
Published in final edited form as: Genet Epidemiol. 2015 Dec 1;40(1):35–44. doi: 10.1002/gepi.21940

Table 2.

Mean (SD) of causal effect estimates from two IV models

IV strength No IV No missing Missing scenario 1a Missing scenario 2b



SNP Haplotype SNP Haplotype SNP Haplotype
Endogeneity ~10%
  20% 0.39 (0.06) 0.32 (0.10) 0.32 (0.10) 0.32 (0.11) 0.32 (0.10) 0.32 (0.10) 0.32 (0.10)
  10% 0.39 (0.06) 0.31 (0.15) 0.32 (0.15) 0.31 (0.15) 0.32 (0.15) 0.31 (0.15) 0.32 (0.15)
  5% 0.41 (0.07) 0.33 (0.23) 0.33 (0.21) 0.33 (0.24) 0.34 (0.21) 0.33 (0.23) 0.33 (0.21)
Endogeneity ~20%
  20% 0.44 (0.06) 0.31 (0.10) 0.32 (0.10) 0.31 (0.11) 0.32 (0.10) 0.32 (0.10) 0.32 (0.10)
  10% 0.47 (0.06) 0.32 (0.16) 0.33 (0.16) 0.32 (0.17) 0.33 (0.16) 0.34 (0.15) 0.34 (0.15)
  5% 0.48 (0.07) 0.32 (0.25) 0.36 (0.22) 0.32 (0.25) 0.36 (0.22) 0.36 (0.20) 0.37 (0.20)
a

Two percent of genotypes is missing for each SNP.

b

Two causal SNPs are completely not typed.