The first and most distal level of the model included
sociodemographic characteristics of the child (sex
and age), a household goods index, presence of regular income,
and maternal schooling. The second hierarchical
level comprised variables related to household physical
conditions (type of flooring, walls and roofing), household
size and composition, and sanitation conditions (source of
drinking water, location used to defecate, and presence of
garbage collection in the village)