BackgroundPatient participation is a key foundation for advance care planning (ACP). However, a patient himself/herself may be left out from sensitive conversations such as end-of-life (EOL) care discussions. The objectives of this study were to investigate patients’ participation rate in the discussion of Cardiopulmonary Resuscitation (CPR) / Do-Not-Attempt-Resuscitation (DNAR) order, and in the discussion that the patient is at his/her EOL stage (EOL disclosure), and explore their associated factors.MethodsThis is a retrospective chart review study. The participants were all the patients who were hospitalized and died in a university-affiliated teaching hospital (tertiary medical facility) in central Tokyo, Japan during the period from April 2018 to March 2019. The following patients were excluded: (1) cardiopulmonary arrest on arrival (CPAOA); (2) stillbirth; (3) under 18 years old at the time of death; and (4) refusal by their bereaved family. Presence or absence of CPR/DNAR discussion and EOL disclosure, patients’ involvement in those discussions, and their related factors were investigated.ResultsCPR/DNAR discussion was observed in 336 out of the 359 patients (93.6%). The patient participation rate was 33.3% (n= 112). Male gender (odds ratio (OR) = 2.37 [95% confident interval (CI) 1.32-4.25]), living alone (OR = 2.51 [1.34 - 4.71]) and one year or more from diagnosis (OR = 1.78 [1.03 - 3.10]) were associated with patient’s participation in CPR/DNAR discussion. EOL disclosure was observed in 341 out of the 359 patients (95.0%). Half of the patients (n=171; 50.1%) participated in the discussion. Patients who died of cancer (OR = 2.41[1.45-4.03]) and patients without mental illness (OR=2.41 [1.11-5.25]) were more likely to participate in EOL disclosure.ConclusionsIn this clinical sample, only up to half of the patients participated in CPR/DNAR discussion and EoL disclosure. Further attempts to facilitate patients' participation, based on their preference, are warranted. A few sociodemographic, psychosocial, and medical factors that relate to patients’ participation in the discussion on CPR/DNAR and EOL disclosure were demonstrated.