Fig. 2: The concept of Mendelian randomisation (MR) and its assumptions.
From: Optimising the use of electronic medical records for large scale research in psychiatry

There are a growing number of MR studies being published that show causal effects related to disease-disease associations and drug-disease associations for mental health and old age psychiatry [179,180,181,182,183,184,185,186] with extensions to traditional MR approaches, which could offer further insights [187,188,189].