Table 2. Input parameters for COVID-19 transmission compartmental model, South Korea*.

Characteristic	Baseline value	Range†	Reference
Hospitalizations for all confirmed cases by disease severity before March 2, %	49.4		(5)
Asymptomatic or mild symptomatic cases	17.0		(5)
Mild symptomatic cases	22.4		(5)
Severely ill cases	6.4		(5)
Critically ill cases	3.6		(5)
Hospitalizations for all confirmed cases by disease severity after March 2, %	82.6		(5,9)
Asymptomatic or mild symptomatic cases (admitted to CTCs)	38.2		(5,9)
Asymptomatic or mild symptomatic cases (admitted to hospitals)	12.0		(5,9)
Mild symptomatic cases	22.4		(5,9)
Severe symptomatic cases	6.4		(5,9)
Critically ill cases	3.6		(5,9)
Proportion admitted to the ICU among hospitalized patients	8.1		(5,9)
Time to outcome, d
Time to symptom onsets	5.1	4.5‒5.8	(11)
Time from symptom onset to hospitalization	4.0	0‒11	(12‒14)
Time from symptom onset to ICU hospitalization	7.0	6‒8	(12‒14)
Time from symptom onset to death	17.0	0‒27	(14)
Length of stay at CTC	16.0	7‒20	(9,18)
Length of stays at hospital without ICU admission	20.9	7.2‒34.6	(15‒17)
ICU length of stay among survivors	30.0	11.6‒47.2	(5,15,16)
ICU length of stay among nonsurvivors	10.0	0 ‒13	(5,15,16)
Case-fatality rate for critically ill patients, %	60.0		(5,9)

*COVID-19, coronavirus disease; CTC, community treatment center; ICU, intensive care unit. †Range was used for sensitivity analysis where available. For parameters that were calculated as proportions, baseline values were used as fixed values.