| Field | Before | After |
|---|---|---|
| Field Study Withdrawn | Before | After No |
| Field Intervention Completion Date | Before | After March 16, 2020 |
| Field Data Collection Complete | Before | After Yes |
| Field Final Sample Size: Number of Clusters (Unit of Randomization) | Before | After 1732 Anganwadi Centres in the first observational visit, 834 Anganwadi Centres in the second observational visit and included in the randomized trial, 1631 Anganwadi Workers in the phone survey |
| Field Was attrition correlated with treatment status? | Before | After No |
| Field Final Sample Size: Total Number of Observations | Before | After 1732 Anganwadi Centres in the first observational visit, 834 Anganwadi Centres in the second observational visit and included in the randomized trial, 1631 Anganwadi Workers in the phone survey |
| Field Final Sample Size (or Number of Clusters) by Treatment Arms | Before | After 277 Anganwadi Centres in the control group, 277 Anganwadi Centres in the light treatment arm, 279 Anganwadi Centres in the intensive treatment arm |
| Field Public Data URL | Before | After https://data.goettingen-research-online.de/dataverse/anganwadi-ironsupplementation |
| Field Is there a restricted access data set available on request? | Before | After Yes |
| Field Restricted Data Contact | Before | After [email protected] |
| Field Program Files | Before | After Yes |
| Field Program Files URL | Before | After https://doi.org/10.25625/LEEJIS |
| Field Data Collection Completion Date | Before | After May 24, 2021 |
| Field Is data available for public use? | Before | After Yes |
| Field | Before | After |
|---|---|---|
| Field Paper Abstract | Before | After To reduce anaemia prevalence among children, we tested the introduction of cast iron ingots to prepare iron-enriched drinking water in pre-schools (Anganwadi centres) in Bihar, India. We implemented a randomized controlled trial among 820 Anganwadi centres with one control and two treatment arms, one arm receiving more comprehensive training and support than the other, between January and March 2020. As children's anaemia status could not be measured at follow-up due to COVID-19, we focused on intermediate steps and used observations of Anganwadi centres and a phone survey with Anganwadi workers to evaluate the intervention. Outcomes included the worker mentioning the newly introduced method without being prompted, the worker remembering detailed steps, and observed indications of the method's use in the centre. These outcomes capture key steps required to be fulfilled for the intervention to reduce anaemia: awareness of the method, knowledge of how to use it, and usage. While a large share of Anganwadi workers remembered the method and could explain its steps, indication of its usage was generally rare but more common in the intensive treatment arm. Successful implementation of the iron supplementation method in the daily routine of Anganwadi centres would require substantial improvements in their functionality. |
| Field Paper Citation | Before | After Lisa Bogler, Ann-Charline Weber, Abhijeet Kumar, Sebastian Vollmer (2026). Iron-fortified drinking water in Anganwadi Centres in rural India: a randomized controlled trial. Review of Development Economics 0:1-12. doi: 10.1111/rode.70122 |
| Field Paper URL | Before | After https://doi.org/10.1111/rode.70122 |