|Average (in days)||Within one week (in %)||Two weeks or more (in %)||Four weeks or more (in %)|
|All scientific fields||16||50||37||17|
|Engineering (incl technology)||14||50||38||15|
|Mathematics and computer sciences||24||46||46||32|
|Public health (incl health professions)||16||54||35||21|
|Economics, business and law||17||47||41||22|
Immediate rejection time is the time it takes an editor to let you know not to be interested in your manuscript (and thus not to send it to reviewers).
More information: Huisman & Smits, 2017. ‘Duration and quality of the peer review process: the author’s perspective’, Scientometrics, 113(1), pp. 633-650.