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Table 4 Two-step MR results for P2X6 as a mediator variable for PD and gastric cancer

From: Causal relationship between Parkinson’s disease and gastric cancer: a Mendelian randomization study

 

Nsnp

β

SE

P value

PD as the exposure and P2X6 as the outcome

17

0.100569

0.047194

0.033094

P2X6 as the exposure and gastric cancer as the outcome

1

− 0.191464

0.096028

0.046171

 

Mediating effect

Direct effect

  

PD as the exposure, gastric cancer as the outcome, and P2X6 as the mediator

− 0.0193

− 0.04647

  
  1. MR Mendelian randomization, PD Parkinson’s disease, Nsnp Number of single nucleotide polymorphisms, B Beta, SE Standard error