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Table 4 Results of the sub-distribution Hazard ratio (sHR) of baseline lymphocyte count and its evolution at day 3 for the risk of ICU-acquired infection (adjusted with the covariates used in the propensity score of acquiring a nosocomial infection before day 28 using an IPTW estimator; see Additional file 2)

From: Persistent lymphopenia is a risk factor for ICU-acquired infections and for death in ICU patients with sustained hypotension at admission

Variables sHR IC-95 p value
Baseline lymphocyte count categorized in 4 classes     0.001
 Normal value ≥1.5 × 103 cells/µL Reference  
 Subnormal class (<1.5 and ≥ 1 × 103 cells/µL) 1.60 1.24 2.08 0.0004
 Low class (<1 × 103 cells/µL and ≥0.5 × 103 cells/µL) 1.43 1.12 1.85 0.004
 Very low class (<0.5 × 103 cells/µL) 1.63 1.23 2.15 0.0006
 Non-significant increase (below 0.2 × 103 cells/µL) at day 3 and abnormal value 1.37 1.12 1.67 0.002