To analyze the status and influencing factors of postoperative pain residual in patients with knee meniscus injury.

A total of 150 patients with knee meniscus injury who were treated by surgery in Navy Qingdao Special Service Convalescent Center from November 2019 to March 2021 were included in the study. All the patients received regular rehabilitation training after operation. The patients were divided into the pain group (n=23) and the non-pain group (n=127) according to the visual analogue scale (VAS) score six months after the operation. The general data and the status of postoperative residual pain were collected and analyzed. the pain after rehabilitation training was analyzed by chi-square test and the influencing factors of residual pain was analyzed by multivariate logistic regression analysis.

Six months after the operation, 23 of 150 patients with knee meniscus injury had pain after rehabilitation training, and the residual pain rate was 15.3%. There was no statistically significant difference in the preoperative VAS score between the two groups (t=0.630, P>0.05); the postoperative VAS scores were lower than the preoperative ones in the two groups (t=3.149, 20.409, both P<0.05); the postoperative VAS score was higher in the pain group than the non-pain group six months after the operation (t=9.961, P<0.05). Age>60 years old, body mass index(BMI)>24 kg/m², articular cartilage injury, osteoarthritis pain, and synovectomy were the influencing factors for postoperative residual pain in the patients who accepted knee meniscus injury surgery[odds ratio (OR)=3.130, 2.164, 2.259, 3.881, 1.998; 95% confidence interval (CI): (1.537, 6.376), (1.420, 3.298), (1.135, 4.495), (1.376, 10.945), (1.054, 3.785), all P<0.05].

Some patients with knee meniscus injury still have residual pain after rehabilitation training, and the occurrence is related to factors such as age>60 years old, BMI>24 kg/m², articular cartilage injury, osteoarthritis pain, and synovectomy.