Purpose: The aim of this study was to determine the relationships between total lymphocyte count (TLC) and prognosis among inpatients.
Patients And Methods: We retrospectively analyzed data from electronic medical documentation of 54 976 inpatients hospitalized in an urban university hospital during 3 consecutive years (2014-2017).
Results: TLC was available for 12 651 (23.01%) of the inpatients. Patients with TLC <0.8 G/L constituted about 15% of the inpatients studied and had the highest risk of death, hospital readmission within 14 days, hospital readmission within 30 days and hospital readmission within 1 year, the lowest values for biochemical parameters of nutritional status assessment, and the highest C-reactive protein levels. An increase in TLC was associated with reduced risk of in-hospital death (odds ratio [OR]; 95% confidence interval [CI]): 0.31; 0.27-0.36 and 14-day readmission: 0.78; 0.72-0.86. The risk of in-hospital death associated with the Nutritional Risk Screening 2002 (NRS-2002) score, blood albumin concentration, and the score for the combined values of hemoglobin, TLC, albumin and neutrophils (HLAN) was (OR; 95% CI): 2.44; 2.35-2.53; 0.32; 0.28-0.36; and 0.96; 0.94-0.97; respectively.
Conclusions: TLC < 0.8 G/L is associated with the highest risk of in-hospital death, 14-day and 30-day readmission, and longer in-hospital stay. An increase in TLC predicted in-hospital survival and freedom from early readmission with a power similar to or greater than a number of prognostic formulas based on questionnaires (e.g. NRS-2002), biochemical parameters (e.g. albumin) and formulas composed of multiple parameters (e.g. HLAN).
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