Study	Reason for exclusion
Assefa 2010	Study design not eligible.
Babu 2015	No control group.
Ban 2015	Intervention not specific to child sanitation.
Blum 1990	Unclear whether child faeces disposal or use of latrines by children was included in the intervention.
Boehm 2016	No relevant outcomes.
Bohnert 2016	Primary school‐based intervention.
Carnell 2014	Outcomes not eligible.
Clarke 2016	Intervention did not seem to include child sanitation.
Clasen 2015	In the intervention there was no messaging done on child faeces disposal or toilet use behaviour change.
Ditai 2016	Intervention not eligible, only included alcohol hand rub.
Dumba 2013	Unclear whether child faeces disposal or use of latrines by children was included in the intervention.
Erismann 2017	School‐based intervention (children aged ≥ 8 years) so no focus on sanitation for children aged < 5 years.
Francis 2016	Intervention not eligible, water filter with no child sanitation component.
Freeman 2015	In the intervention there was no messaging done on child faeces disposal or toilet use behaviour change.
Galiani 2016	Intervention not eligible, handwashing education only, no child sanitation component.
Garn 2016	Intervention not eligible: WASH in primary schools.
Gelaye 2014	No control and intervention was not eligible: primary school intervention.
Gorter 1998	Study design and intervention not eligible.
Greenland 2016	Intervention not eligible, it only included the toilets and service. No specific behaviour change messaging.
Gungoren 2007	Unclear whether child faeces disposal or use of latrines by children was included in the intervention.
Hartinger 2016	Intervention not eligible, no child sanitation component.
Hunter 2004	Risk factor was contact with toileting child or changing nappy (yes vs no) not about the disposal of the faeces and where the faeces end up.
Hürlimann 2018	Unclear whether the intervention included child faeces disposal messaging. Author did not reply.
IOB/UNICEF 2011	Insufficient detail provided on whether child faeces disposal or use of latrines by children was included in the intervention whether there was a control group.
Islam 2018	Study design not eligible (no control), baseline data from the WASH‐B study.
JDC/IHI 2012	Unclear whether child faeces disposal was included in the intervention.
Kaatano 2015	Study design not eligible (before and after study without a control) and unclear whether the intervention included child sanitation.
Lamichhane 2018	Study design not eligible. Analysis of data from the Nepal Demographic Health Survey 2011.
Law 2016	Intervention not eligible: a psychological intervention aimed at improving toilet behaviour of children (aged 4–7 years) with faecal incontinence.
Liu 2017	Unclear whether the intervention included messaging on child faeces disposal. The author did not reply.
Messou 1997	Unclear whether child faeces disposal or use of latrines by children was included in the intervention.
Nerkar 2015	Intervention not eligible: focused on toilet construction and watershed management. No focus on child faeces management.
Njuguna 2016	Risk factor was hand washing after child faeces disposal, not child faeces disposal itself.
Olayo 2014	Intervention and outcomes not eligible.
Park 2018	Unclear whether intervention and outcomes were eligible. Author did not reply.
Raso 2018	Unclear whether intervention included child faeces disposal messaging. Author did not reply.
Reese 2017	Intervention not eligible. Exchange with author confirmed that the intervention did not include specific messaging about child faeces disposal.
Sarkar 2014	Risk factor was not specific to child sanitation, it was use of the latrine by all household members.
Slayton 2016	Intervention not eligible, antimicrobial hand towel with no child sanitation component.
Taha 2000	Intervention and outcome not eligible.
Trinies 2016	Intervention not eligible: WASH intervention based in primary school.
Yeasmin 2017	Intervention, study design, and outcomes not eligible.
Yentur 2015	Risk factor not eligible.
Zomer 2015	Intervention not eligible: focused on hand hygiene only, including after nappy changing but nothing about faeces disposal.

WASH: water, sanitation, and hygiene.