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News

Medication nonadherence is associated with increased health care costs in IBD

Medication nonadherence is related to increased health care costs after controlling for disease severity, reports the latest issue of the Inflammatory Bowel Diseases.

News image

Nonadherence to treatment recommendations is associated with poorer outcomes in inflammatory bowel disease and may increase the cost of care.

Dr Kevin Hommel and colleagues examined the longitudinal relationship between nonadherence and health care costs.

The team hypothesized that at least 3 distinct trajectories of nonadherence would be observed and that increasing nonadherence would account for significantly greater health care costs after controlling for disease activity.

The researchers recruited 99 patients aged 2 to 21 years with inflammatory bowel disease into this 2-year longitudinal study.

Patients with increasing nonadherence over time demonstrate more than a 3-fold increase in costs
Inflammatory Bowel Diseases

Medication possession ratios were calculated from pharmacy refill data, disease activity ratings were obtained from medical charts, and hospital and physician charges associated with an International Classification of Diseases, Ninth Revision code for ulcerative colitis or Crohn's disease were obtained from the hospital's accounting database.

The research team observed an average total cost effect size of d = 0.68 between the increasing severity and stable low severity groups, but the confidence intervals overlap.

Conversely, patients with increasing nonadherence demonstrated significantly higher health care costs than patients with stable =10%, stable 11% to 20%, or decreasing nonadherence.

Dr Hommel's team concludes, "Medication nonadherence is related to increased health care costs after controlling for disease severity."

"Patients with increasing nonadherence over time demonstrate more than a 3-fold increase in costs compared with adherent patients."

"In addition, patients whose adherence improves over time incur approximately the same costs as those who are consistently adherent."

"This suggests that, in addition to leveraging prevention efforts to keep patients from becoming more nonadherent as treatment continues, efforts aimed at modifying adherence behavior may result in significant cost savings over time."

Inflamm Bowel Dis 2017: 23(9): 1577–1583
15 November 2017

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