Abstract
Objective To understand the quality of life of the elderly patients with the total knee replacement three months after the surgery and to analyze the mediation effect of psychological resilience on the relationship between the social support and the quality of life among the postoperative patients. Methods Two hundred and eight patients who first received the bilateral artificial total knee replacement in some Harbin class Ⅲ grade A hospital from October 2014 to October 2016 were included. They were investigated by the general situation questionnaire, the social support scale (SSRS) , the psychological resilience scale (CD-RISC) and the health status questionnaire (SF-36) . Results Three months after surgery, the total score of the psychological resilience, the social support, the quality of life of the included patients was (51.29±11.70) , (35.78±7.12) and (69.13±4.96) , which were all significantly lower compared to the domestic norm (t=-14.876, -17.418, -26.317; P<0.05) . The psychological resilience played a partial intermediary role between the social support and the quality of life of physical health. The mediation effect was 0.053, accounting for 11.30% of the total effect. The psychological resilience played a partial intermediary role between the social support and the quality of life of mental health. The mediation effect was 0.066, accounting for 27.73% of the total effect. Conclusions The quality of life was reduced in the postoperative patients with the total knee replacement surgery. The social support can predict the quality of life of the patients positively and it has an indirect influence which is mediated by the psychological resilience on the patients' quality of life. The psychological resilience mediates the positive effect of the social support on the postoperative patients' quality of life. A good social support system should be established for patients and the psychological resilience level should be enhanced, in order to improve the postoperative patients' quality of life. Key words: Total knee replacement surgery; Quality of life; Psychological resilience; Social support
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