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Severe illness-free survival curves for high and low severity risk groups.
Patients in three cohorts diagnosed with non-severe disease on admission were included in this analysis. Based on their HNC-LL scores, they were stratified into the high and low severe risk groups according to the cut-off value of –1.508.
HR, hazard ratio; CI, confidence interval. P value was calculated using the log-rank test.
*A patient was excluded from this analysis for lack of follow-up information.
