A new analysis indicates that patients who use tobacco or are less educated are more likely to be inappropriately prescribed antibiotics for an acute respiratory tract infection.

“Patients unnecessarily prescribed antibiotics for acute respiratory tract infections (ARTIs) are put at risk for adverse drug effects such as allergic reactions or Clostridium difficile infection,” Tamar F. Barlam, MD, MSc, director of the antimicrobial stewardship program at Boston Medical Center and associate professor of medicine at Boston University School of Medicine, and colleagues wrote. “Despite efforts to improve prescribing, inappropriate use remains commonplace. Further characterization of antibiotic prescribing for ARTIs in ambulatory settings is important to identify predictors of overprescribing.”

In their analysis, Barlam and colleagues reviewed data from the National Ambulatory Medical Care Survey and the National Hospital Ambulatory Medical Care Survey collected from 2006 to 2010. Using ICD-9-CM codes, they identified all cases of various ARTIs not typically treated with antibiotics, categorizing these as “appropriate” or “inappropriate” based on the indicated treatment. Cases were categorized by a number of patient- and health care-specific variables, some of which included patient age, sex, race, tobacco use, insurance, physician care specialty, practice location and care setting. Other variables, such as poverty, household income and attainment of a bachelor’s degree were quantified at the population level using patient ZIP codes and included in analyses for potential interactions.

Barlam and colleagues found that overprescribing was less prevalent when treating patients aged 18 years or younger (OR = 0.55; 95% CI, 0.46-0.65) or patients aged 45 years or older (OR = 0.63; 95% CI, 0.47-0.86). Inappropriate prescribing also was more frequent when treating current tobacco users (OR = 1.71; 95% CI, 1.38-2.12) as well as those living in the quartile of ZIP code areas with the lowest proportion of college-educated residents (OR = 1.41; 95% CI, 1.07-1.86). Patient insurance was an additional factor, with those paying out-of-pocket more likely to be inappropriately prescribed antibiotics than those privately insured (OR = 1.45; 95% CI, 1.17-1.81).

Read the full story at www.healio.com