Female doctor standing with mother and daughter.

Nearly one in three children who are tested for peanut allergies using a well-established and widely used blood test may be allergic to peanuts, according to the latest Quest Diagnostics Health Trends study to examine diagnostic insights into allergy trends in America.

Read More

Cardiovascular Health

Happy couple

A new peer-reviewed Quest Diagnostics Health Trends™ study finds that decades of declines in LDL cholesterol blood levels, a key marker of death risk from heart disease, abruptly ended in 2008, and may have stalled since.

Read More

Drug Testing Index™

Drug testing Testing report data

Driven by increases in cocaine, marijuana, and methamphetamine, drug use by the American workforce remains at its highest rate in more than a decade, finds national analysis by Quest Diagnostics of more than 10 million drug test results. See our interactive map showing with positivity rates and trend lines by three-digit zip code in the U.S. 

See the Data

Women's Health

Pregnant woman sleeping

A Quest Diagnostics Health Trends™ study finds that many pregnant women are not screened for two common sexually transmitted diseases. The study, based on test results of 1.3 million pregnant women, found that only 59% and 57% of  women were tested at least once for chlamydia and gonorrhea, respectively, during their pregnancy.

Read more

More Health Trends Quest Diagnostics Health Trends™ reports also include studies of gestational diabetes, diabetes, H1N1 Influenza, kidney disease, cardiovascular health and rotavirus infection.