Primary Outcomes (explanation)
1) Pre-school attendance: Baseline enrollment rosters were collected before the intervention and subsequent participation data was collected through monthly, unannounced visits to all preschools. At each visit, enumerators determined whether each child from the baseline roster was present, absent, had left school, or had transferred to another school. Those present at school are counted as “participants” and those who had dropped out or were absent as “nonparticipants." Children who transferred to another NGO preschool were tracked at those schools during subsequent attendance checks. Children who moved away from the area or about whom the teacher did not have good information, are lost from the sample (until they return to an NGO preschool, if ever).
2) Anthropometrics: measured at health camps by enumerators.
3) Hemoglobin levels: The Hb test consisted of a finger prick blood draw conducted by professional laboratory staff and analyzed using the Cyanometh technique.