Variability in measuring (instrumental) activities of daily living functioning and functional decline in hospitalized older medical patients: a systematic review.

Summary: Imagine trying to build a house where every carpenter uses a different tape measure—some use inches, some use centimeters, and some just guess. That is essentially what is happening when doctors try to measure how well older patients function in the hospital. A new review looked at 28 different studies and found that medical teams use five different "rulers" (tests) to check basic skills like walking or dressing. Even worse, they disagree on what counts as a patient "getting worse," with definitions varying wildly. This confusion makes it nearly impossible to compare results across hospitals or understand the best way to help seniors recover independence.