noun
randomized controlled trial
Technical term used in clinical research and statistics to describe a study design where participants are randomly assigned to groups.
この新薬の効果は、無作為化比較試験によって検証された。
The efficacy of this new drug was verified through a randomized controlled trial.
Synonymous; ランダム化比較試験 is a more direct loanword-based equivalent, while 無作為化比較試験 uses the native Japanese term 無作為 for 'randomization'.
Compound of 無作為化 (randomization) + 比較 (comparison) + 試験 (trial). The term is a direct translation of the English 'randomized controlled trial'.