Demographic, clinical, and laboratory findings of COVID-19 patients
In this retrospective study, 528 patients diagnosed with COVID-19 were included, 41 patients with different tumor type (tumor group) and 487 patients without tumor (non-tumor group). Tumor type included 5 lung cancer, 5 gastrointestinal cancer, 5 blood cancer, 4 breast cancer, 4 head and neck cancer, 3 gynecological tumor, 3 liver cancer, 2 thyroid cancer, 2 urinary tumors, 2 prostate cancer, 2 esophagus cancer,1 pancreas cancer, 2 glioma and 1 osteosarcoma.
Compared with patients without tumor, patients with tumor were elder (median age 66 years [56-73] vs 58 years [39-68], p<0.001) (table 1). The gender distribution didn’t show significant difference. As for the Laboratory findings, tumor group showed significant higher levels of white blood count (WBC), neutrophil count (NEUT), neutrophil-to-lymphocyte ratio (NLR) and C-reactive protein (CRP) than non-tumor group, but lymphocyte count (LY) and the level of serum albumin were lower in tumor group (table 1). The level of D-dimer in tumor group was elevated than non-tumor group, however, it did not showed any significance in the multivariable regression analyze (data not shown). Of the 35 (85.37%) moderate patients in tumor group, 18 (51.43%) experienced poor progression during subsequent hospitalization; while in non-tumor group, this proportion was 240 (54.42%) progression in 441 (90.55%) moderate patients. We observed no obvious difference in disease progression between two groups. In terms of mortality, our data still showed no significant difference (19.51% vs 11.91%, p=0.16, table 1).
Different characteristics of moderate and severe patients on admission
As in the early stage of COVID-19, most patients were mild or moderate, and the majority of mild patients were admitted to the Fangcang shelter hospitals. So almost all the patients admitted in our hospital during this period were moderate or severe cases. We explored the differences between moderate and severe patients at admission separately in patients with tumors and without tumors (table 2). In tumor group, severe patients showed marked lower LY (0.95[0.67-1.28] vs 0.45[0.37-0.82], p=0.014) and higher NLR (4.51[2.16-7.23] vs 11.53 [11.34-13.30], p=0.031). Based on the results of univariable logistic regression, factors with p <0.05 were included for the multivariable logistic regression, only LY was negatively related to the severity (p=0.044). In non-tumor group, the levels of LY, NLR, D-dimer, CRP, and serum albumin were all significant different between moderate and severe patients. Then we did the multivariable regression and found only lower levels of LY and serum albumin were associated with the severity in COVID-19 patients without tumor.
Risk factors associated with poor progression among moderate patients
It was reported that almost 20% of COVID-19 patients with mild or moderate early presentation can develop severe or critical grade13. To further confirm the risk factors associated with poor progression among early moderate patients, we enrolled 476 moderate patients including 35 (7.35%) patients with tumor and 441 (92.65%) patients without tumor (table 1). According to the disease development, they were divided into two subgroups, stabilization and poor progression group (table 3). We found in patients with tumor, poor progression cases had higher CRP (5.19 [1.25-9.8] vs 1.47 [0.19-3.14], p=0.017) and lower serum albumin (32.0 [29.3-35.4] vs 37.7 [34.1-40.1], p=0.033) than stabilization patients, which also made sense in subsequent multivariable regression analysis (p=0.017 and p=0.033 separately). While in non-tumor moderate patients, older age, male, and higher levels of CRP were the risk factors associated with poor progression (table 3).
Risk factors associated with death in-hospital
We divided patients into survivor group and non-survivor group. The mortality was 19.51% in tumor group (table 1). The median age of non-survivors was 72 years old (IQR 71-80), elder than survivors (63, IQR 55-70) (p=0.006, table 4). But in multivariable logistic regression, this difference was meaningless; while higher NLR and CRP level were risk factors associated with death in-hospital among tumor patients (p=0.027 and 0.029 separately). In patients without tumor, older age, male, higher NLR and CRP were risk factors related to death in-hospital (table 4).