03 Jul 2017 --- Children with a food allergy have a significantly higher prevalence of childhood anxiety, according to a new US study. Researchers studied the link between food allergy and childhood anxiety and depression among a sample of predominantly low socioeconomic status minority children. However, food allergies were not associated with symptoms of childhood depression or with symptoms of anxiety or depression among their caregivers.

The study was conducted by researchers from Columbia University's Mailman School of Public Health and Albert Einstein College of Medicine and results are published in the Journal of Pediatrics.

Food allergies are increasingly common among youth in the US, with recent estimates as high as 8 percent. However, until now little was known about the effects of food allergy in low socioeconomic ethnic minority populations.

The researchers studied 80 pediatric patients ages 4-12 years, 8 years old on average, with and without food allergy and their caregivers from urban pediatric outpatient clinics in the Bronx, New York. They controlled for an asthma diagnosis in the children, as anxiety and mood disorders are more prevalent among youth with asthma and especially more common in low socioeconomic minority children.

Among the children with a food allergy, 57 percent reported having symptoms of anxiety compared to 48 percent of children without a food allergy. Approximately 48 percent of the children had symptoms of depression with or without a food allergy.

“Management of food allergy can be expensive both in terms of food shopping, meal preparation, and the cost of epinephrine auto-injectors, which expire annually,” says Renee Goodwin, lead author. “These demands could result in higher levels of anxiety for those with fewer financial resources and further heighten anxiety symptoms in children and their caregivers.”

The results suggest that food allergy is particularly linked to elevated social anxiety and fear of social rejection and humiliation.

“There are a number of possible explanations for the relationship found between food allergy diagnosis and increased social anxiety issues in this sample of pediatric patients,” notes Dr. Goodwin. “Management of a potentially life-threatening condition may be anxiety provoking, and some children may experience increased social anxiety about being "different" from other children depending on their age and how food allergy is managed by adults in a particular setting.”

The researchers also point out a possible explanation for not finding a link between food allergy and depression in children. The sample was young, and the mean age of onset of depression is significantly later than anxiety.

“It would be worthwhile to examine these relationships among older adolescents and young adults with food allergy who are at the peak of risk for depression onset, especially because early anxiety is associated with increased risk for subsequent onset of depression,” says Jonathan Feldman, PhD, professor at Ferkauf Graduate School of Psychology, Yeshiva University.

“With the high prevalence of food allergies today, education in schools remains a priority,” says Dr. Goodwin. “Given the strong association between food allergy and social anxiety in children future investigations on the food allergy-mental health relationship are also warranted in clinical, school and community-based settings which could aid in the development of interventions.”