Development and Validation of the RCOS Prognostic Index: A Bedside Multivariable Logistic Regression Model to Predict Hypoxaemia or Death in Patients with SARS-CoV-2 Infection
Table 2
The RCOS prognostic index.
Reference range
Prognostic score
Age (years)
40–49
1
50–59
2
60–69
3
≥70
4
Systolic BP (mm Hg) ≥ 140
1
Heart rate (pm) ≥ 100
1
Respiratory rate (pm) ≥ 22
2
AST (IU/L)
0 to 40
40–79
1 to 2x UNL
1
≥80
>2x UNL
2
LDH (IU/L)
207 to 414
700–899
1.69 to 2.17x UNL
1
≥900
>2.17x UNL
2
Urea (mg/dL)
15 to 39
40–49.9
1 to 1.25x UNL
2
≥50
>1.25x UNL
3
C-reactive protein (mg/dL)
0 to 0.5
0.5–0.9
1 to 1.99x UNL
1
1–1.9
2 to 3.99x UNL
2
2–3.9
4 to 7.99x UNL
3
4–5.9
8 to 11.99x UNL
4
6–8.9
12 to 17.99x UNL
5
9–11.9
18 to 23.99x UNL
6
≥12
≥24x UNL
7
Sodium-mmol/L < 135
135 to 148
1
Lymphocyte count (×10^9/L)
1 to 5
<0.8
3
0.8–0.999
1
Neutrophil count (×10^9/L)
1.2 to 8
8–9.9
1
≥10
2
Neutrophil/lymphocyte ratio
3–3.9
1
4–5.9
2
6–7.9
3
≥8
4
BP, blood pressure; pm, per minute; AST, aspartate transaminase; LDH, lactate dehydrogenase; UNL, upper normal limit; LNL lower normal limit.
