Yinghao Yang,1,2,* Dong Li,1,3,* Jinqiu Nie,1,* Junxue Wang,1 Huili Huang,1 Xiaofeng Hang1 

1Department of Infectious Diseases, Changzheng Hospital, Naval Medical University, Shanghai, People’s Republic of China; 2Department of Infectious Diseases, the 988th Hospital of the Joint Logistic Support Force, Zhengzhou, People’s Republic of China; 3Department of Gastroenterology, The 971th Hospital of PLA Navy, Qingdao, People’s Republic of China

*These authors contributed equally to this work

Correspondence: Huili Huang; Xiaofeng Hang, Department of Infectious Diseases, Changzheng Hospital, 415 Fengyang Road, Huangpu District, Shanghai, People’s Republic of China, Email huanghl1124@qq.com; hangxfdoc@smmu.edu.cn

Purpose: Patients with severe SARS-CoV-2 omicron variant pneumonia pose a serious challenge. This study aimed to develop a nomogram for predicting survival using chest computed tomography (CT) imaging features and laboratory test results based on admission data.
Patients and Methods: A total of 436 patients with SARS-CoV-2 pneumonia (323 and 113 in the training and validation groups, respectively) were enrolled. Pneumonitis volume, assessed on chest CT scans at admission, was used to identify low- and high-risk groups. Risk analysis was performed using clinical symptoms, laboratory findings, and chest CT imaging features. A predictive algorithm was developed using Cox multivariate analysis.
Results: The high-risk group had a shorter survival duration than the low-risk group. Significant differences in mortality rate, neutrophil and lymphocyte counts, C-reactive protein (CRP) concentration, and urea nitrogen level were observed between the two groups. In the training group, age, pneumonia volume, total bilirubin, and blood urea nitrogen were independent prognostic factors. In the validation group, age, pneumonia volume, neutrophil count, and CRP were independent prognostic factors. A personalized prediction model for survival outcomes was developed using independent predictors.
Conclusion: A personalized prediction model was created to forecast the 5-, 10-, 15-, 20-, and 30-day survival rates of patients with COVID-19 omicron variant pneumonia based on admission data, and can be used to determine the survival rate and early treatment of severe patients.

Keywords: predictive nomogram, prognosis, COVID-19, pneumonia, omicron