Table 2

Brief summary of study timeline

MilestoneTiming
Main trial phase study set-upApril to September 2017
Sites 1 and 2
 Identification of potentially eligible participantsOctober to December 2017
 Recruitment and baseline and data collectionNovember 2017 to January 2018
 Intervention participants receive Incredible Babies bookNovember 2017 to January 2018
 Follow-up one data collectionJanuary to February 2018
 Delivery of Incredible Years Baby ProgrammeMarch to May 2018
 Follow-up two data collectionAugust to September 2018
 Delivery of Incredible Years Toddler ProgrammeJanuary to March 2019
 Follow-up three data collectionMay 2019 to June 2019
 Process evaluation interviews and focus groupsJuly 2019
Sites 3 and 4
 Identification of potentially eligible participantsMay to July 2018
 Recruitment and baseline and data collectionJune to August 2018
 Intervention participants receive Incredible Babies bookJune to August 2018
 Follow-up one data collectionJuly to September 2018
 Delivery of Incredible Years Baby ProgrammeOctober to December 2018
 Follow-up two data collectionMarch to May 2019
 Delivery of Incredible Years Toddler ProgrammeSeptember to November 2019
 Follow-up three data collectionDecember 2019 to January 2020
 Process evaluation interviews and focus groupsFebruary 2020
 Final reportJuly 2020