[Analysis of risk factors for postoperative functional recovery of fractures around knee joint]

To screen factors independently affect functional recovery of fracture around knee joint by analyzing risk factors of fracture around knee joint (FAKJ) in minors.

Clinical data of 364 FAKJ patients were collected from June 2017 to June 2019, and Logistic regression was performed for single-factor and multivariate analysis. Possible risk factors were included, such as age, gender, residential environment, guardianship relationship, causes of injury , fracture type, fracture treatment modality, duration of braking, presence of rehabilitation physician's guidance, and compliance of the affected person. Univariate and multifactorial analyses were performed to select risk factors affecting FAKJ. Poor recovery from FAKJ was defined as the presence of pain, reduced joint motion, or claudication in one of the affected limbs during follow-up period.

Fifty-one patients out of 364 FAKJ patients presented with poor recovery, with an incidence of 14.01%, 35 patients (9.61%) with limited knee motion, 10 patients (2.75%) with knee pain, 5 patients (1.37%) with functional claudication, and 1 patient (0.27%) with re-fracture. Univariate analysis revealed statistically significant differences in ages, type of fracture braking time and affected party compliance between two groups(P<0.05). Analysis result showed age was greater than or equal to 7 years old[OR=1.512, 95%CI(1.019, 2.118), P<0.05], proximal tibial fracture[OR=3.813, 95%CI (3.189, 5.334), P<0.05], braking time above 4 weeks [OR=1.299, 95%CI(1.081, 8.418), P<0.05], and poor compliance[OR=1.282, 95%CI(1.119, 3.921), P<0.05] were risk factors for FAKJ.

Age was greater than or equal to 7 years old, proximal tibvial fracture, braking time was greater than or equal to 4 weeks, and patient poor compliance are risk factors that influence functional recovery of patients with FAKJ and may help clinical care to screen high-risk patients as well as to develop individualized treatment plans.