1. The quality of being proven to work or produce desired results through evidence, testing, or experience
The medication has proven effectiveness in treating the disease.
O medicamento tem eficácia comprovada no tratamento da doença.
2. Demonstrated capability or success based on documented results or trials
The strategy's proven effectiveness made it the preferred approach.
A eficácia comprovada da estratégia a tornou a abordagem preferida.