Lauren Covington, assistant professor in the University of Delaware School of Nursing, found that children with inconsistent sleep schedules have higher body mass index (BMI) percentiles. Her research also found that children from households with greater poverty had more overall inconsistent sleep onset times. For families living in poverty, consistent sleep scheduling may not be so easily done, especially if a caregiver is the only parent, juggling multiple jobs, parenting multiple children or dealing with a tenuous housing situation.