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Table 1 Clinical characteristics of the severe patients with COVID-19

From: Scores based on neutrophil percentage and lactate dehydrogenase with or without oxygen saturation predict hospital mortality risk in severe COVID-19 patients

Variables Training dataset (China data) n = 96 Test dataset (Iran data) n = 43 P value
Age (years), mean (SE) 63.47 (1.36) 63.37 (2.70) 0.972
Male, n (%) 49 (51.0) 30 (69.8) 0.039
Smoking history, n (%) 1 (1.0) 2 (4.7) 0.064
Symptoms on admission, n (%)    
 Fever 86 (89.6) 20 (46.5)  < 0.001
 Cough 78 (81.3) 23 (53.5) 0.222
 Fatigue 86 (89.6) 27 (42.2)  < 0.001
 Shortness of breath 70 (72.9) 24 (55.8) 0.983
 Headache 17 (17.7) 4 (9.3) 0.453
 Diarrhea 20 (20.8) 1 (2.3) 0.017
Coexisting disorder, n (%)    
 Hypertension 33 (34.4) 12 (27.9) 0.748
 Diabetes 16 (16.7) 8 (18.6) 0.296
 Chronic obstructive pulmonary disease 3 (3.1) 2 (4.7) 0.444
 Cerebral infarction 1 (1.0) 1 (2.3) 0.42
 Coronary heart disease 10 (10.4) 0 0.057
 Chronic kidney disease 3 (3.1) 1 (2.3) 0.768
 Chronic liver disease 0 0
Respiratory rate, mean (SE) 27.24 (0.57) 22.76 (1.09)  < 0.001
Heart rate, mean (SE) 92.89 (1.749) 90.34 (1.88) 0.323
In-hospital deaths, n (%) 31 (32.3) 13 (30.2) 0.809