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Table 1 Baseline characteristics of the study cohort

From: Nomogram to identify severe coronavirus disease 2019 (COVID-19) based on initial clinical and CT characteristics: a multi-center study

Clinical characteristics Training cohort(n = 152) Validation cohort(n = 65) t / χ2 value P value
Clinical severity    0.007 0.933
 Mild illness 102 (67.1) 44 (67.7)   
 Severe illness 50 (32.9) 21 (32.3)   
Age 45.79 ± 17.88 46.43 ± 16.45 0.248 0.805
Sex
 Male 87 (57.2) 40 (61.5) 0.347 0.556
 Female 65 (42.8) 25 (38.5)   
Basic disease    2.778 0.096
 Yes 23 (15.1) 16 (24.6)   
 No 129 (84.9) 49 (75.4)   
  1. Note.“Yes” of Basic disease means patients with one of the following disease: hypertension, diabetes, coronary heart disease, chronic obstructive pulmonary disease
  2. Data are numbers of patients, with percentages in parentheses