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 3

Proportion of patients who experienced the study outcome (death or hypoxaemia) segregated by risk group.

Risk group	Development		Validation
	No. of patients (%)	Outcome (%)	No of. patients (%)	Outcome (%)
Low (0–2)	1314 (32.57)	37 (2.82)	755 (36.9)	21 (2.78)
Intermediate-low (3–4)	832 (20.62)	36 (4.33)	392 (19.16)	43 (10.97)
Intermediate-high (5–6)	533 (13.21)	70 (13.13)	253 (12.37)	42 (16.6)
High (7–8)	340 (8.43)	95 (27.94)	157 (7.67)	58 (36.94)
Very high (>8)	1016 (25.18)	723 (71.16)	489 (23.9)	384 (78.53)