1. The proven or established ability of something to produce the desired or intended result
The demonstrated effectiveness of the new treatment has led to its approval by health authorities.
A eficácia comprovada do novo tratamento levou à sua aprovação pelas autoridades de saúde.
2. Evidence-based proof that a method, strategy, or product works as claimed
The study provided demonstrated effectiveness of the marketing campaign in increasing sales.
O estudo forneceu comprovação da eficácia da campanha de marketing no aumento de vendas.