Fig. 3
From: Defining ICD-10 surrogate variables to estimate the modified frailty index: a Delphi-based approach
The three rounds of the Delphi consensus survey demonstrating how the 128 ICD-10 variables initially included, were narrowed down to 54 to determine the mFI. Numbers in red depict excluded variables after each Delphi round, while numbers in green depict included ICD-10 variables