ICU Admission Preferences in the Hypothetical Event of Acute Critical Illness: A Survey of Very Old Norwegians and Their Next-of-Kins.

Objectives: To explore older patients' ICU admission preferences and their next-of-kins' ability to predict these preferences.

Design: Self-administered survey.

Setting: Three outpatient clinics, urban tertiary teaching hospital, Norway.

Patients: Purposive sample of outpatients 80 years old or older regarded as potential ICU candidates and their next-of-kins.

Interventions: None.

Measurements and main results: We asked about the patients' ICU admission preferences in three hypothetical scenarios of acute critical illness. Next-of-kin respondents were asked to make a proxy statement regarding the older respondents' wishes regarding ICU admission. For each treatment choice, all respondents could provide their level of confidence. Additionally, we sought to identify demographic and healthcare-related characteristics that potentially influenced ICU admission preferences and proxy accuracy. Of 202 outpatients 80 years old or older, equal proportions opted for (39%; CI, 33-45%) and against (40%; CI, 34-46%) ICU admission, and one in five (21%; CI, 17-26%) did not wish to engage decision-making. Male gender, religiosity, and prior ICU experience increased the likelihood of older respondents opting for ICU admission. Although next-of-kins' proxy statements only weakly agreed with the older respondents' true ICU admission preferences (52%; CI, 45-59%), they agreed with the next-of-kins' own ICU admission preferences (79%; CI, 73-84%) to a significantly higher degree. Decisional confidence was high for both the older and the next-of-kin respondents.

Conclusions: In this purposive sample of Norwegian potential ICU candidates 80 years old or older, we found substantial variation in the ICU admission preferences of very old patients. The next-of-kins' proxy statements did not align with the ICU admission preferences of the older respondents in half of the pairs, but next-of-kins' and older respondents' confidence levels in rendering these judgments were high.