Use of serum KL-6 and chest radiographic severity grade to predict 28-day mortality in COVID-19 patients with pneumonia: a retrospective cohort study

Table 3 Predictive performance of KL-6, RSG and combined score for 28-day mortality in COVID-19 patients

Variables	AUC(95%CI)	Sensitivity	Specificity	P value
KL-6, U/ml	810	0.885(0.804–0.952)	73.1%	93.6%	< 0.001
RSG	3	0.818(0.711–0.899)	76.9%	74.5%	< 0.001
Combined scores (development group)	103.04	0.868(0.776–0.942)	46.2%	95.0%	< 0.001
Combined scores (validation group)	103.04	0.932(0.862–0.997)	76.9%	90.0%	< 0.001

Abbreviation KL-6 Krebs von den Lungen-6, RSG Radiological Severity Grade, AUC the area under the curve, CI confidence interval

ISSN: 1471-2466