If you are referring to the of a specific clinical measurement tool like the EQ-5D (a health questionnaire used by leukemia patients), reviews show it has high "known-groups validity"—meaning it accurately discriminates between patients based on age, education, and treatment severity. Clinical Overview of Leukemia
The phrase "" most likely refers to the use of Mendelian Randomization (MR) to evaluate the validity of causal relationships and drug targets in leukemia research . leukemia - Mr Validity
(PDF) Optimizing Mendelian Randomization for Drug Prediction If you are referring to the of a
: To ensure high validity, researchers recommend using tissue-specific instrumental variables and a threshold (typically ) to exclude redundant genetic data. leukemia - Mr Validity