Table 1. Incubation period, duration of hospitalization, and time from onset to medical visit, hospitalization, and laboratory diagnosis of COVID-19.

Authors	Location/Population	Period of Study	Case Numbers	Estimates (days)	Variation
Incubation Period
Li and colleagues [21]	Wuhan	Before Jan 21	10	5.2a	95% CI 4.1–7.0
Xu and colleagues [22]	Zhejiang	Jan 10–26	56	4.0b	IQR 3.0–5.0
Backer and colleagues [23]	Travelers from Wuhan	Jan 20–28	88	6.4a	95% CI 5.6–7.7
Guan and colleagues [24]	China	Dec 11–Jan 29	291	4.0b	IQR 2.0–7.0
Linton and colleagues [25]	China, publicly available	Before Jan 31	158	5.6c	95% CI 5.0–6.3
Tian and colleagues [26]	Beijing	Before Feb 10	262	6.7	SD 5.2
Bi e and colleagues [27]	Shenzhen	Jan 14–Feb 12	183	4.8b,d	95% CI 4.2–5.4
Wang and colleagues [28]	Henan	Jan 21–Feb 14	483	7.4d	95% CI 2.0–20.0
WHO [6]	China	Before Feb 20	NA	5.0–6.0	Range 1–14
Onset to first medical visit
Li and colleagues [21]	Wuhan	Before Jan 1	45	5.8a	95% CI 4.3–7.5
Li and colleagues [21]	Wuhan	Jan 1–11	207	4.6a	95% CI 4.1–5.1
Sun and colleagues [29]	China, publicly available	Before Jan 18	NA	5.0b	NA
Sun and colleagues [29]	China, publicly available	After Jan 18	NA	2.0b	NA
Sun and colleagues [29]	China, publicly available	Jan 22–30	200	3.0b	IQR 0.0–15.0
W u and colleagues [30]	Tianjin	Before Feb 18	40	4.5b	Range 1.0–13.0
Onset to hospitalization
Huang and colleagues [14]	Wuhan	Dec 16–Jan 1	41	7.0b	IQR 4.0–8.0
Li and colleagues [21]	Wuhan	Before Jan 1	44	12.5a	95% CI 10.3–14.8
Li and colleagues [21]	Wuhan	Jan 1–11	189	9.1a	95% CI 8.6–9.7
Xu and colleagues [22]	Zhejiang	Jan 10–26	62	2.0b	IQR 1.0–4.3
Wang and colleagues [31]	Wuhan	Jan 1–28	138	7.0b	IQR 4.0–8.0
Linton and colleagues [25]	Outside of Wuhan, living	Before Jan 31	155	3.3b,c	95% CI 2.7–4.0
Linton and colleagues [25]	Outside of Wuhan, deceased	Before Jan 31	34	6.5b,c	95% CI 5.2–8.0
Tian and colleagues [26]	Beijing	Before Feb 10	262	4.5	SD 3.7
Onset to laboratory diagnosis
WHO [6]	China	early Jan	NA	12.0b	Range 8.0–18.0
WHO [6]	China	early Feb	NA	3.0b	Range 1.0–7.0
WHO [6]	Wuhan	early Jan	NA	15.0b	Range 10.0–21.0
WHO [6]	Wuhan	early Feb	NA	5.0b	Range 3.0–9.0
Bi and colleagues [27]	Shenzhen	Jan 14–Feb 12	183	5.5	95% CI 5.0–5.9
Hospitalization to laboratory diagnosis
Tian and colleagues [26]	Beijing	Before Feb 10	262	2.1	SD 1.9
Onset to dyspnea
Huang and colleagues [14]	Wuhan	Dec 16–Jan 2	41	8.0b	95% CI 5.0–13.0
Wang and colleagues [31]	Wuhan	Jan 1–28	138	5.0b	IQR 1.0–10.0
Onset to ICU admission
Wang and colleagues [31]	Wuhan	Jan 1–28	36	10.0	IQR 6.0–12.0
Zhou and colleagues [32]	Wuhan, ≥18 years old	Before Jan 31	191	12.0b	IQR 8.0–15.0
Onset to clinical recovery
WHO [6]	China, mild cases	Before Feb 20	NA	NA	2.0 weeks
WHO [6]	China, severe cases	Before Feb 20	NA	NA	3.0–6.0 weeks
Onset to death
Wang and colleagues [30]	China	Dec 1–Jan 26	17	14.0b	Range 6.0–41.0
Wang and colleagues [30]	China, 70 years old or above	Dec–Jan 26	NA	11.5	Range 6.0–19.0
Wang and colleagues [30]	China, below 70 years old	Dec 1–Jan 26	NA	20.0	Range 10.0–41.0
Linton and colleagues [25]	China, publicly available	Before Jan 31	158	15.0d	95% CI 12.8–17.5
WHO [6]	China	Before Feb 20	2,114	NA	Range 2.0–8.0 weeks
Zhou and colleagues [32]	Wuhan, ≥18 years old	Before Jan 31	54	18.5b	IQR 15.0–22.0
Hospitalization to death
Linton and colleagues [25]	China, publicly available	Before Jan 31	16	8.8a	95% CI 7.2–10.8
Zhou and colleagues [32]	Wuhan, ≥18 years old	Before Jan 31	54	7.5b	IQR 5.0–11.0
Hospitalization to discharge
Guan and colleagues [24]	China	Dec 11–Jan 29	963	12.0	IQR 10.0–14.0
Zhou and colleagues [32]	Wuhan, ≥18 years old	Before Jan 31	137	12.0b	IQR 9.0–15.0
Wu and colleagues [33]	Wuhan	Dec 25–Feb 13	201	13.0b	IQR 10.0–16.0

Abbreviations: COVID-19, coronavirus disease 19; ICU, intensive care unit; IQR, interquartile range; NA, not reported in the paper; 95% CI, 95% confidence interval.

^aWeibull distribution was used to estimate means and 95% CI.

^bThe estimates are medians, the rest are means.

^cGamma distribution was used to estimate median and 95% credible interval.

^dLog-normal distribution was used to estimate median and 95% credible interval.