Phase angle as a potential predictor for unplanned ICU readmission risk in critically ill surgical patients: a retrospective cohort study.

Of 510 discharges, 68 (13.3%) were followed by unplanned intensive care unit readmission.

Low PhA0 and low PhAdc were associated with readmission in bivariable analyses.

Emergency surgery was also independently associated (aOR = 4.57, 2.00-10.40; P < 0.001).

Findings were directionally consistent across sensitivity analyses.