JOURNAL ARTICLE

The incidence and severity of adverse events affecting patients after discharge from the hospital

Alan J Forster, Harvey J Murff, Josh F Peterson, Tejal K Gandhi, David W Bates
Annals of Internal Medicine 2003 February 4, 138 (3): 161-7
12558354

BACKGROUND: Studies of hospitalized patients identify safety as a significant problem, but few data are available regarding injuries occurring after discharge. Patients may be vulnerable during this transition period.

OBJECTIVE: To describe the incidence, severity, preventability, and "ameliorability" of adverse events affecting patients after discharge from the hospital and to develop strategies for improving patient safety during this interval.

DESIGN: Prospective cohort study.

SETTING: A tertiary care academic hospital.

PATIENTS: 400 consecutive patients discharged home from the general medical service.

MEASUREMENTS: The three main outcomes were adverse events, defined as injuries occurring as a result of medical management; preventable adverse events, defined as adverse events judged to have been caused by an error; and ameliorable adverse events, defined as adverse events whose severity could have been decreased. Posthospital course was determined by performing a medical record review and a structured telephone interview approximately 3 weeks after each patient's discharge. Outcomes were determined by independent physician reviews.

RESULTS: Seventy-six patients had adverse events after discharge (19% [95% CI, 15% to 23%]). Of these, 23 had preventable adverse events (6% [CI, 4% to 9%]) and 24 had ameliorable adverse events (6% [CI, 4% to 9%]). Three percent of injuries were serious laboratory abnormalities, 65% were symptoms, 30% were symptoms associated with a nonpermanent disability, and 3% were permanent disabilities. Adverse drug events were the most common type of adverse event (66% [CI, 55% to 76%]), followed by procedure-related injuries (17% [CI, 8% to 26%]). Of the 25 adverse events resulting in at least a nonpermanent disability, 12 were preventable (48% [CI, 28% to 68%]) and 6 were ameliorable (24% [CI, 7% to 41%]).

CONCLUSION: Adverse events occurred frequently in the peridischarge period, and many could potentially have been prevented or ameliorated with simple strategies.

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