Table 2. The Cox Proportional-Hazards Model for PCEP.
| Factor | HR | CI 95% | p-value |
|---|---|---|---|
| Sex (male) | 1.505 | [0.944,2.401] | 0.086 |
| Age cat0 | ref | ||
| Age cat1 | 1.278 | [0.529,3.087] | 0.586 |
| Age cat2 | 1.295 | [0.576,2.909] | 0.532 |
| Age cat3 | 2.077 | [0.925,4.666] | 0.077 |
| Age cat4 | 1.512 | [0.662,3.453] | 0.327 |
| SpO2 cat0 | ref | ||
| SpO2 cat1 | 0.674 | [0.270,1.681] | 0.397 |
| SpO2 cat2 | 2.495 | [1.075,5.793] | 0.033 |
| SpO2 cat3 | 6.275 | [2.537,15.524] | <0.001 |
| lymphopenia | 3.457 | [2.189,5.457] | <0.001 |
| thrombocytopenia | 1.598 | [1.042,2.449] | 0.0315 |
| AUC | 0.85 | [0.78,0.91] | |
Age categories were 0–44, 45–54, 55–64, 65–74, > = 75 years (cat0-cat4); SpO2 categories were <80%, 80%-89%, 90%-94%, 95%-100% (cat3-cat0); Lymphopenia: lymphocyte count < 109 /L; Thrombocytopenia: Platelet count < 150×109 /L; AUC: area under the ROC.