Receiver operating characteristic curves for the association of primary outcome using each clinical risk score and each clinical risk score adjusted for long-term care insurance certificate possession in the subgroup of patients with heart failure with pres... Receiver operating characteristic curves for the association of primary outcome using each clinical risk score and each clinical risk score adjusted for long-term care insurance certificate possession in the subgroup of patients with heart failure with preserved ejection fraction. AUC, area under a receiver operating characteristic curve; LTCI, long-term care insurance. Kayo Takahashi et al. Open Heart 2016;3:e000501 ©2016 by British Cardiovascular Society