Fig. 6From: Neutrophil-to-lymphocyte ratio predicts critical illness patients with 2019 coronavirus disease in the early stageKaplan–Meier curves of risk group stratification for no critical illness in the derivation cohorts. a The cutoffs of NLR for each risk group were as follows: low risk: < 3.13, and high risk: ≥ 3.13. b Risk group stratification according to age and c NLR combined with ageBack to article page