• Micah T Prochaska, Richard Newcomb, Graham Block, Brian Park, and David O Meltzer.
• Department of Medicine, Section of Hospital Medicine, The University of Chicago, Chicago, Illinois, USA. mprochas@medicine.bsd.uchicago.edu.
• J Hosp Med. 2017 Nov 1; 12 (11): 898904898-904.

ObjectiveTo assess multiple Hb-based measures of anemia in hospitalized patients and test whether these are associated with fatigue.DesignProspective observational study.SettingUrban, academic medical center.PatientsHospitalized general medicine patients, age =50 years, with any Hb < 9 g/dL.MeasurementsMeasures of anemia were created for each patient based on the Hb values from their hospitalization (mean, median, minimum, maximum, admission, and discharge). Fatigue was measured using the Functional Assessment of Chronic Illness Therapy (FACIT)-Fatigue subscale.ResultsSeven hundred eighty-four patients participated. Minimum Hb was strongly associated with fatigue. Patients with a minimum Hb of < 8 g/dL had higher fatigue levels (mean FACIT [standard deviation] Hb < 7 g/dL: 25 [13], 7 g/ dL = Hb <8 g/dL: 25 [14] Hb =8 g/dL: 29 [14], P = 0.001) and were more likely to report high levels of fatigue (FACIT-Fatigue < 27) (56% vs 41%; P = 0.002). Mean Hb had a less robust association with fatigue than minimum Hb, and no other measure of Hb was associated with patients' fatigue levels.ConclusionsMinimum Hb is associated with fatigue while hospitalized and may help identify patients for interventions to address anemia-related fatigue.© 2017 Society of Hospital Medicine

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