Table 1

Main epidemiological characteristics of COVID-19 and SARS in mainland China

CharacteristicsCOVID-19*SARSP value
Time of the epidemic8 December 2019–16 November 2002–28 May 2003NA
Number of cases82 8585327NA
Attack rate (per million persons)61.8 (95% CI 61.4 to 62.2)4.0 (95% CI 3.9 to 4.1)<0.0001
CFR (%)5.6 (95% CI 5.4 to 5.8)6.4 (95% CI 5.8 to 7.1)0.01
Age (years), median (IQR)52 (39–63)34 (24–47)<0.0001
Sex, male to female ratio1.0 (39 777/40 067)†1.0 (2720/2607)0.08
Healthcare workers, n (%)3402 (4.1) (95% CI 4.0 to 4.2)1021 (19.2) (95% CI 18.7 to 19.7)<0.0001
Onset-to-diagnosis interval (days), median (IQR)8 (4–13)5 (2–9)<0.0001
  • *Data on COVID-19 were collected up to 28 April 2020.

  • †Number of COVID-19 cases with sex records.

  • CFR, case fatality rate; NA, not applicable; SARS, severe acute respiratory syndrome.