Fig. 2

a Nomogram for predicting deterioration: each variable is projected onto line 1 to obtain the model. The sum of the scores is marked in the penultimate line, and a vertical line to the bottom line represents a final prediction from the risk score count. The case shown here is with an incubation period 4.8 days, no dyspnea, no number of comorbidities, D-dimer 0.128 mg/L, CRP 0.067 mg/L, and no CT lesions in the lungs, final score 81.3, predicted risk (pr) value 0.00286, low risk of deterioration. b The case calculated a relative predictive value of 0.003 (95% CI 0.001–0.016) according to the variable through the network counter. CRP C-reactive protein