Doctors heed warning, new analysis discovers

Fewer antibiotic prescriptions are being filled in U.S.

The use of antibiotics among Americans with commercial health insurance has decreased during the past several years, according to a new analysis that nevertheless shows lingering variations ford if fe rent ages and indifferent parts of the country.

The study released last week provides the latest evidence of how doctors and patients have begun to heed warnings that excessive antibiotic use breeds dangerous drug resistance and “superbug” bacteria. The analysis is based on 173 million insurance claims from people under age 65 with Blue Cross Blue Shield coverage who filled prescriptions between 2010 and 2016.

It is a sequel of sorts to research by the federal Centers for Disease Control and Prevention, which found a smaller decline and comparable age and geographic variations. The CDC reported a 5 percent decrease overall between 2011 and 2014 in antibiotic prescriptions written inout patient settings such as doctors’ offices, clinics and hospital emergency rooms. The study by the Blue Cross Blue Shield Association found that 9 percent fewer antibiotics prescribed in outpatient settings were filled in 2016, compared with 2010.

Efforts to make sure that doctors and patients rely on antibiotics only when necessary have gained prominence in recent years. A study last year by the CDC and the Pew Charitable Trusts was the first to try to quantify the over- use, concluding that nearly one-third of the antibiotics prescribed in outpatient settings were not needed.

Many of these estimated 47million unnecessary prescriptions were for colds or other respiratory illnesses that are caused by viruses and do not respond to antibiotics.

The Blue Cross Blue Shield analysis of 31 million commercially insured customers a year found that the steepest decrease in filled prescriptions was for children — a drop of 16 percent, comparedwith6 percent for adults. The prescriptions filled for infants fell themost: 22 percent.

As with earlier research, the analysis also found wide geographic differences, with people in the South and Appalachia tending to fill prescriptions at rates signifificantly greater than those in New England and along the West Coast. The highest rates were in Mississippi, Alabama and Arkansas. However, between 2010 and 2016, the rates fell in all states except Delaware, Illinois and Nebraska.

Among types of antibiotics, the decrease was greatest among those that are broad-spectrum — covering a wide range of bacteria and most likely to lead to drug-resistance. Still, the

analysis found that about one in fifive of the filled prescriptions after outpatient visits were for conditions not considered treatable by such antibiotics.

Trent Haywood, chief medical officer for the Blue Cross Blue Shield Association, said in a statement that the study suggests public health efforts to reduce inappropriate use “appear tobe achieving measurable results,” particularly in mis use of broad-spectrum antibiotics. But, hesaid, “there are further improvements to be made.”

A study found nearly one-third of the antibiotics prescribed in outpatient settings were not needed.

FOTOLIA According to the JohnsHopkins Bloomberg School of PublicHealth research, kidswho take antibiotics during childhood gainweight faster than thosewho do not.