Objectives
To examine the differences in code status changes and subsequent mortality between younger and older inpatients.
Design
Retrospective cohort study
Setting
Kaiser Permanente Northern California (KPNC)
Participants
Patients hospitalized at 21 KPNC hospitals between 2008 and 2012
Measurements
We categorized 227,252 inpatients into young, elderly, and very elderly age groups (<65, 65-84, and ≥85 years, respectively). We evaluated the effect of age on adding new and reversing prior life-sustaining treatment (LST) limitations. We compared survival to inpatient discharge by age group after adding new LST limitations.
Results
At admission, 18,256 (54.2%) of the very elderly and 18,349 (20.8%) of the elderly had a non-full code order, compared with 3,258 (3.1%) of the young patients. Among the 187,664 patients admitted as full code, 15,932 (8.5%) added new limitations; among the 39,861 patients admitted with LST limitations, 3,017 (7.6%) had these reversed. New limitations were more likely to be seen in older patients (odds ratio (OR)=2.27, 95% confidence interval (CI)=2.16-2.39 for elderly; and OR=6.43, 95% CI=6.05-6.84 for very elderly), and reversals of prior limitations were less likely to be seen in older patients (OR=0.73, 95% CI =0.65-0.83 for elderly; and OR=0.46, 95% CI=0.41-0.53 for very elderly), compared with younger patients. Among those who added new limitations, survival rates were 71.7% in very elderly, 57.2% in elderly, and 43.4% in young patients (p<0.001).
Conclusion
Changes in code status were common among hospitalized patients. Age was a key determinant in the likelihood of adding new or reversing prior LST limitations. Compared with younger patients, older patients who added LST limitations were more likely to survive to hospital discharge.