. 2020 Jun;20(6):669–677. doi: 10.1016/S1473-3099(20)30243-7

Table 2.

Estimates of case fatality ratio obtained from individual-level data on cases identified outside of mainland China

		Parametric		Non-parametric
		n	Case fatality ratio	n	Case fatality ratio
Overall		585	2·7% (1·4–4·7)	1334	4·1% (2·1–7·8)
Travel versus local transmission
	Travellers to mainland China	203	1·1% (0·4–4·1)	208	2·4% (0·6–8·5)
	Local transmission	382	3·6% (1·9–7·2)	387	3·8% (1·7–8·2)
Age group, years
	<60	360	1·4% (0·4–3·5)	449	1·5% (0·6–3·9)
	≥60	151	4·5% (1·8–11·1)	181	12·8% (4·1–33·5)

Parametric estimates are presented as posterior mode (95% credible interval), and were obtained using the gamma-distributed estimates of onset-to-death and onset-to-recovery. Non-parametric estimates are presented as maximum likelihood estimate (95% confidence interval) and were obtained using a modified Kaplan-Meier method.¹¹^,²³ Note that due to missing data on age and travel status, numbers in the stratified analysis are lower than for the overall analysis. In addition, the parametric method requires a correction for the epidemic growth rate, and these estimates were therefore obtained from the subset of data for which the travel or local transmission and age was known.