Quest Diagnostics Health Trends™

Special Report 2013: Read the latest Quest research on peanut allergies in “Back to School: Diagnostic Insights into Peanut Allergies in Children”.

Allergies Across America

Allergies are a major public health concern, affecting about one in five Americans. In Allergies Across America, Quest Diagnostics provides results of the largest analysis of allergy testing on patients in the United States who are under medical evaluation for symptoms associated with allergies.

In this report you will discover that:

  • America’s allergy problem is increasing and changing - and certain allergens are more of a problem than others.

  • Patients exhibit different responses to allergens, as measured by Immunoglobulin (IgE) blood testing, based on age and gender.

  • Sensitization to two environmental allergens is increasing, consistent with climate change research.

  • Economically disadvantaged children may be at heightened risk for the “allergy march,” a progression of allergy disease that can lead to asthma.

  • Physicians are changing the way they test their patients for allergies.

Allergies Across America is a Quest Diagnostics Health Trends report, a series of analyses designed to inform patients, health professionals, and policymakers about the status of the nation’s health. Quest Diagnostics Health Trends Reports are based on expert commentary and analysis of the Quest Diagnostics national database of de-identified diagnostic test results from more than 1.5 billion patient encounters since 2000.





Download the executive summary.
Download the full PDF report.
Download the Special Report Addition: 30 Worst Big Cities for Ragweed Ranking.


Read our press releases about our report

Men May Have Greater Allergy Risk Than Women, Suggests Largest Ever National Allergy Study

Ragweed and Mold Lead Overall Upswing in Allergy Prevalence; Climate Change Suspected

Food Allergies Common among Children and Linked to Environmental Allergies and Asthma Later in Life, Suggests Largest-Ever National Allergy Study


Read news articles about our report

Study: Top cities for ragweed, allergies
USA Today

Child Food Allergies Linked to Asthma
United Press International


Key charts and graphs

Worst Cities for Allergies

A ranking of rates of allergy sensitization in the 30 most populous cities in the United States. For more information, refer to page 16 of the report.

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Regional Sensitization Rates for Common Ragweed

Increasing rates of environmental allergens, particularly ragweed, are consistent with other research suggesting climate change may be affecting certain environmental allergies. For more information, refer to page 13 of the report.

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Overall Sensitization Rates by Age and Gender

Men had higher sensitization rates than women at all ages, a novel and potentially clinically significant finding. For more information, refer to page 19 of the report.

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IgE Sensitization for Food Allergens in Childhood

The Quest Diagnostics study is the largest to reveal a pattern of allergen sensitivity consistent with the "allergy march," a medical condition by which allergies to foods in early childhood heighten the risk for the development of additional and more severe allergy-related conditions, including asthma, later in life. For more information, refer to page 24 of the report.

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IgE Testing Rates for Children in Medicaid and Private Insurance

Children 5 years of age and younger enrolled in Medicaid were 18% less likely to be tested than children of the same age group covered by private health insurance, suggesting that economically disadvantaged children may be less likely to be tested at early ages. For more information, refer to page 30 of the report.

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Growth of Number of Physicians Ordering ImmunoCAP by Specialty

Increasingly, allergies are being diagnosed by pediatricians and other primary care physicians, whose ordering of ImmunoCAP, the IgE test used in the study, grew 46% and 49%, respectively, over the 4-year period. For more information, refer to page 32 of the report.

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