Utilizing this variety can be more efficient in etiological studies, but it
complicates the comparisons of different studies (11).
Values in the region are necessary to evaluate the effects of the
socioeconomic effects of the regions people live in on their health
outcomes (14).
Children from families with low socioeconomic conditions have a
high risk of being born with a low birth weight, malnutrition, being
exposed to passive smoking, and infection. Besides, educational
opportunities are more restricted (14).