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)

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)

 Low class (<1 × 10³ cells/µL and ≥0.5 × 10³ cells/µL)

 Very low class (<0.5 × 10³ cells/µL)

 Non-significant increase (below 0.2 × 10³ cells/µL) at day 3 and abnormal value