Table 1

Study size and extracted data for the lognormal mu and sigma parameters from the nine studies that were used for meta-analysis

AuthornPublication status
1 July 2020
LocationObservation periodMean
(Median)
(days)
97.5th
(95th) percentile
(days)
Lognormal parameters used in meta-analysis
MuSESigmaSE
Backer et al3488PRChinese and international—travellers from Wuhan20–28 January6.411.11.7960.0770.3490.045
Lauer et al27181PRChinese and international - travellers from known affected areas4 January to
24 February
5.511.51.6210.0640.4180.069
Li et al2810PREarly cases in Wuhan1 December to
31 January
5.212.5**1.4250.2400.6690.141
Bi et al26183PRShenzhen—travellers from Wuhan14 January to
12 February
4.8*14.01.5700.2450.6500.167
Jiang et al3240PPLocation unclear14 December to
8 February
4.99.7**1.5300.0660.4640.046
Linton et al29158PRCases external to WuhanStart of epidemic until 31 January5.610.8**1.6110.0700.4720.048
Zhang et al3149PRChina—provinces other than HubeiStart of epidemic until 27 February5.210.5**1.5400.0920.4700.072
Ma et al30587PPMultiple countries including ChinaNot specified7.4171.8570.0240.5470.023
Leung3561†PRChina—provinces other than Hubei10 January to
12 February
7.214.61.7800.3530.6800.248
  • *Median, **95th percentile

  • †Inferred from data reported.

  • PP, preprint, not peer reviewed; PR, published, peer reviewed.