Lung function test used to diagnose COPD can aid patients whilst reducing healthcare costs

According to a recent study by the Canadian Medical Association Journal (CMAJ), patients with chronic obstructive pulmonary disease (COPD) would benefit greatly if pulmonary function testing was used more consistently when diagnosing the condition.

COPD is currently the third principal cause of death worldwide and affects over 10% of adults.

At the moment, testing airflow with pulmonary function testing equipment is a key in diagnosing COPD, but it is vastly underused. Only 30% to 50% of people with physician-diagnosed COPD undergoing testing.

“Given low rates of testing, these findings point to an opportunity to improve patient outcomes, reduce health services use and decrease health care costs by increasing rates of testing for suspected COPD,” writes Dr. Andrea Gershon, Sunnybrook Research Institute and Institute for Clinical Evaluative Sciences (ICES), with coauthors.

Researchers analysed data for 68,898 patients diagnosed with COPD between 2005 and 2012, including 16,798 patients with newly diagnosed COPD. Only 41% had received pulmonary function testing, and were more likely to be younger, have seen a specialist and have a primary care physician who followed clinical guidelines for COPD. They were also less likely to have comorbidities.

The researchers also found that patients who underwent lung function testing as a diagnostic tool were 10.4% less likely to be hospitalized for COPD or to die of any cause compared with patients who did not undergo testing when other differences between these groups were controlled for. They also found an association between lung function testing and increased use of medication for COPD, a finding consistent with previous research.

“Our results support the commonly held understanding that pulmonary function testing is key to the accurate diagnosis and quality care of people with COPD,” state the authors.

They suggest that using this testing more frequently to diagnosis suspected cases of COPD can improve patient outcomes, promote better use of health care services and cut costs.

The study was conducted by researchers at ICES, the Sunnybrook Health Sciences Centre, The Hospital for Sick Children (SickKids), the University Health Network and the Dalla Lana School of Public Health, University of Toronto, Toronto, Ontario; and the University of Ottawa, Ottawa, Ontario. It was supported by a grant from the Ontario Lung Association and Pfizer Canada.


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