“…e analysis of the mediating effect showed that self-efficacy partially mediated the effect between social support and perception of benefit from illness, with the mediating effect accounting for 35.53% of the total effect, indicating that social support can affect perception of benefit from illness both directly and indirectly through the mediating effect of self-efficacy, which is similar to the results of a related study in China [15]. Self-efficacy reflects the degree to which an individual realizes his or her potential, which can be improved through learning, and higher selfefficacy indicates that acute leukemia caregivers are more confident in their ability to cope with caregiving tasks [16]. When caregivers face frustration and poor mood, the higher their perceived social support, the more they will make full use of the various resources provided by healthcare professionals, family members, and friends, so that their internal self-efficacy will increase, they will take the initiative to learn about disease treatment, master caregiving skills, improve their caregiving adaptability, reduce anxiety and depression, and other negative emotions, and, at the same time, enhance the positive experience brought about by caregiving.…”