: In the context of inland AIS technical specifications, FI 22 can also represent the Requested Time of Arrival (RTA) at locks, bridges, or terminals. 2. Medical & Clinical Research

While less common, "FI-22" has historical significance in US federal tax regulations.

: Researchers use this to quantify a patient's health status based on the accumulation of "deficits."

1. Maritime Communication (AIS Application-Specific Messages)

: Articles often explore the incidence of FI in specific populations (e.g., individuals aged 65 and older) or evaluate new scoring systems for more accurate clinical assessment. 3. Engineering & Industrial Automation