Table 2

Outputs from multiple Mendelian randomisation (MR) methods using genetic variants associated with body mass index (BMI) as instrument variables to test for genetic evidence of an aetiological relationship between BMI and red cell distribution width

MethodEstimateSEP value
Simple median0.50.13<0.001
Weighted median0.550.14<0.001
Inverse weighted median0.520.09<0.001
MR-egger0.50.220.025
(MR-egger intercept)0.0010.0060.91
  • All models used random-effects modelling.