Table 1

Details of study data collection instruments

VariableMethodBaselineMonthlyEffectiveness phase (12 months)Extended implementation (24 months)Study personnelComments
Sociodemographic dataBasic health history and demographics surveyXStudy nurseOnline supplemental file 1
Development
(primary outcome)
Bayley Scales of Infant Development, Version 340XXXStudy psychologist or paediatricianCommercial instrument
Home environment
(secondary outcome)
Home Observation for Measurement of the Environment13XXXStudy nurseCommercial instrument
AnthropometricsWeight (kg), length (cm)XXXStudy nurseWHO Growth Standards will be used to convert to z-scores41
Diet qualityMinimum dietary diversity, minimum meal frequency and minimum acceptable dietXXXStudy nurseWHO Infant and Young Child Feeding indicators42
HaemoglobinHemocue Hb 201+XXXStudy nurseUsing manufacturer’s protocol
Focus groups/interviews with stakeholdersFocus groups and interview guides to be developed in year 1 of the projectXXXQualitative research staffInstruments under development during first 1 year of project
Cost to caregivers/familiesSurveyXFrontline workersInstruments under development during first 1 year of project
Cost to frontline workersSurveyXResearch coordinatorInstruments under development during first 1 year of project
Costs to health systemSurveyXResearch coordinatorInstruments under development during first 1 year of project