Objective Response Rate

Views Updated: Dec 15, 2025

Key Facts

Abbreviation
ORR
Pronunciation
/əˈbʤɛktɪv rɪˈspɑns reɪt/
Category
Governmental
Related Field
FDA

Examples in Context

  1. Secondary endpoints included objective response rate, one-year survival rate, overall survival, PFS assessment by chemotherapy type and safety.
  2. Primary endpoint was objective response rate ( ORR ) per mRECIST in the lead-in stage.
  3. The primary end point was progression-free survival; secondary end points included the objective response rate, overall survival, and safety.
  4. Results : The objective response rate of neoadjuvant chemotherapy assessable in 21 patients was 43 %.
  5. The primary endpoint was objective response rate ( ORR ), and the second endpoints were the durative time of remission ( DTR ), time of tumor progression ( TTP ), time of treatment failure ( TTF ), safety assessment and adverse events.

Other meanings of ORR

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