2.4 | Randomization and allocation concealment
After signing an informed consent and undergoing a basic assessment, HF patients were randomly assigned by using a random number table through an online random tool (https://tools.medsci.cn/rand/getNumWithCode) (random number seed: 70472134). Researcher No.1 was responsible for the randomization process, but not participating in the enrollment. Enrollment was performed by investigator No.2. In order to avoid mutual contamination among HF patients in the same ward, the potential patients in the same wards were also excluded. One hundred and forty patients were randomized and assigned to the professional recording group (PRG) or the simplified recording group (SRG). Eleven patients were excluded lately because of losing observation, in-hospital death, or transferring to other departments. The flow chart of patients screening and allocating was shown in Figure 1.