LAUSR

OBJECTIVES: To examine 1-year functional outcomes after invasive mechanical ventilation for adults greater than or equal to 65 years with preexisting long-term care-needs. DESIGN: We used medical and long-term care administrative databases. The database included data on functional and cognitive impairments that were assessed with the national standardized care-needs certification system and were categorized into seven care-needs levels based on the total daily estimated care minutes. Primary outcome was mortality and care-needs at 1 year after invasive mechanical ventilation. Outcome was stratified by preexisting care-needs at the time of invasive mechanical ventilation: no care-needs, support level 1–2 and care-needs level 1 (estimated care time 25–49 min), care-needs level 2–3 (50–89 min), and care-needs level 4–5 (≥90 min). SETTING: A population-based cohort study in Tochigi Prefecture, one of 47 prefectures in Japan. PATIENTS: Among people greater than or equal to 65 years old registered between June 2014 and February 2018, patients who received invasive mechanical ventilation were identified. INTERVENTIONS: None. MEASUREMENTS AND MAIN RESULTS: Among 593,990 eligible people, 4,198 (0.7%) received invasive mechanical ventilation. The mean age was 81.2 years, and 55.5% were male. The 1-year mortality rates after invasive mechanical ventilation in patients with no care-needs, support level 1–2 and care-needs level 1, care-needs level 2–3, and care-needs level 4–5 at the time of invasive mechanical ventilation were 43.4%, 54.9%, 67.8%, and 74.1%, respectively. Similarly, those with worsened care-needs were 22.8%, 24.2%, 11.4%, and 1.9%, respectively. CONCLUSIONS: Among patients in preexisting care-needs levels 2–5 who received invasive mechanical ventilation, 76.0–79.2% died or had worsened care-needs within 1 year. These findings may aid shared decision-making among patients, their families, and heath care professionals on the appropriateness of starting invasive mechanical ventilation for people with poor functional and cognitive status at baseline.