Data related to the participants’ demographic and socioeconomic
profiles include sex, type of school attended, whether
the participant was born in the UAE (indicative of longterm
exposure to the UAE environment), ethnicity, monthly
family income, parents’ education level, residential property
tenure, the number of individuals who reside in household,
and the number of bedrooms in residence. A residential
crowding variable was calculated using the ratio for the
number of individuals who reside in household over the
number of bedrooms in residence. Ethnicity was classified on
the basis of similar cultures, traditions, ancestral linkages, or
geographical origins.