Socioeconomic status (SES), measured by dichotomizing INSE scores into two categories (> 3 vs ≤3)
SES may predict arboviral infection risk
Each arm within ±5% of overall proportion
Population density may predict arboviral infection risk
Each arm within ±5% of overall population density
Number of students in grades 1 and 2 combined
Proxy for age of participants to be enrolled in a given cluster. Age is predictive of individual arboviral infection risk.
Each arm 45–55% of total number