Development and Validation of a Prediction Model of the Risk of Pneumonia in Patients with SARS-CoV-2 Infection

Table 4

Distribution of actual pneumonia grades in the training cohort and validation cohort.

Actual pneumonia grade	Participants n (%)
	Training cohort	Validation cohort
0	99 (48.29%)	47 (50.00%)
1	70 (34.15%)	22 (23.40%)
2	23 (11.22%)	18 (19.15%)
3	12 (5.85%)	6 (6.38%)
4	1 (0.49%)	1 (1.06%)