The experimental group will be provided a pressure injury prediction of the patient and personalized care information of pressure injury by a smart care platform. The participants (primary caregivers) will fill out the questionnaires online at admission (baseline-T0) and before the patient is discharged(T1). The questionnaires will collect the following data, including demographic information(only T0), knowledge, self-efficacy, anxiety, depression of wound care(T0&T1), and satisfaction of the smart care platform(only T1). The time to fill out the questionnaires will be about 10 minutes.

Routine care

Data from the medical records will be used to analyze the probability and risk of wound healing for creating a Pressure Injury Prediction and Education Model using a mobile application system.

The investigators designed the ten questions regarding pressure injury care knowledge to detect caregivers' understanding of pressure injury care. The higher scores reflect a greater understanding of pressure injury care.

The fourteen items of the self-efficacy of pressure injury care are designed to detect caregivers' self-efficacy on pressure injury care. Response options on the items range from "no confidence" (1 point) to "every confidence" (5 points). The higher scores reflect greater self-efficacy on pressure injury care.

The GAD-7 (Spitzer et al., 2006) is a one-dimensional instrument designed to detect generalized anxiety disorder symptoms defined in the DSM-IV. The item scores range from 0 (not at all) to 3 (nearly every day), resulting in a sum score ranging from 0 to 21. The higher scores reflect greater anxiety severity.

The nine items of the PHQ-9 are designed to capture the nine Diagnostic and Statistical Manual of Mental Disorders (DSM) symptom criteria for a major depressive episode. Response options on the items range from "not at all" (0 points) to "nearly every day" (3 points). As a severity measure, the PHQ-9 score can range from 0 to 27.

The ten items of satisfaction with the smart care platform are designed to detect caregivers' satisfaction with this platform. Response options on the items range from "strongly disagree " (1 point) to "strongly agree" (5 points), resulting in a sum score ranging from 10 to 50.