Objective
To examine the association of patient- and medication-related factors with post-discharge medication errors.
Patients and Methods
The Vanderbilt Inpatient Cohort Study (VICS) includes adults hospitalized with acute coronary syndromes (ACS) and/or acute decompensated heart failure (ADHF). We measured health literacy, subjective numeracy, marital status, cognition, social support, education, income, depression, global health status, and medication adherence in patients enrolled between October 2011 and August 2012. We used binomial logistic regression to determine predictors of discordance between the discharge medication list and patient-reported list during post-discharge medication review.
Results
Among 471 patients, mean age was 59 years; mean total number of medications reported was 12; and 17% had inadequate or marginal health literacy. Half (51%) of patients had ≥1 one discordant medication (i.e., appeared either on the discharge or patient-reported list but not both); 27% failed to report a medication on their discharge list; and 36% reported a medication not on their discharge list. Additionally, 59% had a misunderstanding in indication, dose, or frequency in a cardiac medication. In multivariable analyses, higher subjective numeracy (Odds Ratio (OR)=0.81, 95% Confidence Interval (CI) 0.67-0.98) was associated with lower odds of having discordant medications. For cardiac medications, participants with higher health literacy (OR=0.84, CI 0.74-0.95), higher subjective numeracy (OR=0.77, CI 0.63-0.95), and who were female (OR=0.60, CI 0.46-0.78) had lower odds of misunderstandings in indication, dose, or frequency.
Conclusion
Medication errors are present in approximately half of patients following hospital discharge and are more common among patients with lower numeracy or health literacy.