Number	ID	Description	Question	Coding
Publication details
1.01	ID	Unique study identifier	Surname of first author and year of publication	Author##
1.02	AUTHOR	First author	Surname, Initial.	Surname, Initial.
1.03	TITLE	Full title	Full title of paper	Open answer
1.04	SHORT_TITLE	Short title	Short version identifying paper	Open answer
1.05	DATE	Publication date	Year	YYYY
1.06	COUNTRY			Open answer
1.07	LOCATION			Open answer
1.08	REGION	Region of study	Which region was the study conducted in?	1=East Asia & Pacific (EAP) 2=Latin America & Caribbean (LAC) 3=Middle East & North Africa (MENA) 4=South Asia (SA) 5=Sub‐Saharan Africa (SSA)
2. Intervention details
2.01	INTERVENTION_TECHNOLOGY	WASH technology received by participants	Indicate type of WASH technology received	1.1=Water supply: community provision 1.2=Water supply: household provision 1.3=Water supply: at school 1.4=Water supply at health facility 2.1=Water quality: community provision 2.2=Water quality: household provision 2.3=Water quality: at school 2.4=Water quality: at health facility 3.1=Sanitation: latrines for communal use 3.2=Sanitation: latrines for household use 3.3=Sanitation: latrines at school 3.4= Sanitation: latrines at health facility 3.5=Sanitation: safe waste disposal system (e.g. sewer connection/drainage system) 4.1=Hygiene: improved handwashing practices 4.2=Hygiene: handwashing supplies (e.g. soap or hand sanitiser) for household 4.3=Hygiene: handwashing supplies (e.g. soap or hand sanitiser) at school 4.4=Hygiene: handwashing supplies (e.g. soap or hand sanitiser) at health facility 4.5=Hygiene: menstrual care 4.6=Hygiene: other improved practices (incl. face washing) 4.7=Hygiene: combined technologies 5.1=Combined water supply and sanitation (WSS) 5.2=Combined water and hygiene 5.3=Combined sanitation and hygiene 5.4=Combined water, sanitation, and hygiene
2.02	MULTIPLE_TECHNOLOGY	Multiple technologies	Indicate complete list of all WASH technologies	1.1=Water supply: community provision 1.2=Water supply: household provision 1.3=Water supply: at school 1.4=Water supply at health facility 2.1=Water quality: community provision 2.2=Water quality: household provision 2.3=Water quality: at school 2.4=Water quality: at health facility 3.1=Sanitation: latrines for communal use 3.2=Sanitation: latrines for household use 3.3=Sanitation: latrines at school 3.4= Sanitation: latrines at health facility 3.5=Sanitation: safe waste disposal system (e.g. sewer connection/drainage system) 4.1=Hygiene: improved handwashing practices 4.2=Hygiene: handwashing supplies (e.g. soap or hand sanitiser) for household/community 4.3=Hygiene: handwashing supplies (e.g. soap or hand sanitiser) at school 4.4=Hygiene: handwashing supplies (e.g. soap or hand sanitiser) at health facility 4.5=Hygiene: menstrual care 4.6=Hygiene: other improved practices (incl. face washing) Indicate NA if 2.03 is not marked 4.7 ‐ 5.4
2.03	INTERVENTION_MECHANISM	Mechanism used to encourage/give WASH technology to participants	Indicate the mechanism by which the above technology was supplied to the individual/household/facility/community	1=Direct provision 2.1=Health messaging (incl. hygiene education): mass media 2.2=Health messaging (incl. hygiene education): household/community level 2.3=Health messaging (incl. hygiene education): training of trainers (incl. teachers, community leaders, medics) 2.4=Health messaging (incl. hygiene education): combined approach 3.1=Psychosocial ‘triggering’: directive (incl. social marketing) 3.2=Psychosocial ‘triggering: participative (incl. CLTS) 4.1=Systems‐based: pricing reform (incl. subsidies and vouchers) 4.2=Systems‐based: improving operator performance (incl. institutional reform, capacity building, operator financing, regulation, and accountability) 4.3=Systems‐based: private sector (PS) and small‐scale independent providers (SSIPs) involvement (incl. contracting out) 4.4=Systems‐based: community driven development (CDD, incl. social funds and community driven development) 5=Multiple mechanisms
2.04	MULIPLE_MECHANISM	Multiple mechanisms	Indicate all mechanisms used to deliver the technologies and write a brief description of what mechanism is used for what technology	1=Direct provision 2.1=Health messaging (incl. hygiene education): mass media 2.2=Health messaging (incl. hygiene education): household/community level 2.3=Health messaging (incl. hygiene education): training of trainers (incl. teachers, community leaders, medics) 3.1=Psychosocial ‘triggering’: directive (incl. social marketing) 3.2=Psychosocial ‘triggering: participative (incl. CLTS) 4.1Systems‐based: pricing reform (incl. subsidies and vouchers) 4.2=Systems‐based: improving operator performance (incl. institutional reform, capacity building, operator financing, regulation, and accountability) 4.3=Systems‐based: private sector (PS) and small‐scale independent providers (SSIPs) involvement (incl. contracting out) 4.4=Systems‐based: community driven development (CDD, incl. social funds and community driven development) Underneath the codes include an open answer description of what mechanism is used for what technology. Indicate NA if 2.05 is not marked 5
2.05	RURAL	Rural setting	Is study conducted in a rural area?	1=Yes 2=No
2.06	URBAN	Urban setting	Is study conducted in an urban or peri‐urban (end of urban) area?	1=Yes 2=No
2.07	SLUM	Slum setting	Is study conducted in a slum (informal settlement)?	1=Yes 2=No
2.08	REFUGEE	Refugee camp setting	Is study conducted in a refugee camp?	1=Yes 2=No
2.09	TARGET_GROUP	Intervention targeting	Which population groups did the intervention target?	Open answer (e.g. women, children, elderly, disabled)
3. Study design and data collection
3.01	STUDY_DESIGN	Design type	Categorise the study design	1.1= Individually randomised controlled trial (RCT) 1.2= Cluster‐RCT 2.1= Quasi‐RCT (e.g. alternation) 2.2= Cluster‐quasi‐RCT 3= RDD (quasi‐experiment with discontinuity assignment) 4= CBA (quasi‐experiment with baseline and endline data collection in intervention and comparison group) 5= Cross‐section study (quasi‐experiment with endline data collection only in intervention and comparison group) 6= Reflexive control (before vs. after with no comparison group) 7= Cohort study 8= Case control study
3.02	STUDY_METHODS	Methods of inference	What methods are used to identify the treatment effect?	1=DID (difference‐in‐differences or fixed effects analysis) 2=PSM (statistical matching e.g. propensity‐score matching, coarse‐exact matching, propensity‐weighted regression) 3=Instrumental variables (IV)/Heckman selection (including switching regression) models 4=Multivariate regression/covariates‐adjusted analysis (e.g. ANCOVA analysis) 5=Bivariate analysis / comparison of means
4. Impacts
4.01	IMPACT_VARIABLE	Impact or final outcome	What impacts are reported (code multiple outcomes in additional columns)?	1.1=Morbidity: Diarrhoea 1.2=Morbidity: Accute Respiratory Infections (ARIs) 1.3=Morbidity: Other water related infections (e.g. helminth infections) 1.4=Morbidity: Other health outcomes (e.g. drudgery, pain, musculoskeletal disorders) 1.5=Psycho‐social health (eg happiness) 1.6=Mortality 2.1=Nutrition/anthropometry (eg HAZ, WAZ, BMI) 3.1=Education (eg absenteeism) 3.2=Labour market outcomes (eg employment) 3.3=Safety 3.4=Income/consumption/poverty 4.1=Water quantity consumed/used (water supply behaviour change) 4.2=Water treatment practices (water quality behaviour change) 4.3=Sanitation behaviour (incl. construction of facilities for triggering interventions) 4.4=Hygiene behaviour 4.5=Time use 4.6=Willingness to pay 5=Cos‐benefit analysis