To assessing which nutritional screening tools are better predictors of short-term postoperative motor function.

Inclusion creteria: indications of total hip arthrolasty(THA); hospital stay period ≧24 h. Exclusion creteria: the patients with cognitive disorders or mental diseases; severe cardiovascular diseases, renal failure, anemia or infection.In strict accordance with the inclusion and exclusion criteria, 115 elderly patients (all single hip OA) with elective THAadmitted to Lu’an Second People’s Hospital from January 2016 to June 2018 were selected. Nutritional status screening was performed within 24 h of admission. Basic clinical data and blood test indexes were collected. The normal and dyskinesia groups were defined according to the modifified Iowa level of assistance scale(mILAS). Pearson test was used to determine the influencing factors between nutrition risk assessment scale(NRS-2002) score and mini nutritional assessment short form(MNA-SF) score. The sports ability predictors were determined by multiple logistic regression.

No in-hospital deaths occurred during the perioperative period. The surgeries were successfully completed. The average length of stay was (5.7±2.0) d. The mean score of mILAS scale was (1.4±1.3). The results were defined according to the exercise condition: 99 cases (86.1%) in the normal exercise group and 16 cases (13.9%) in the dyskinesia group. Age, body mass index (BMI), albumin (ALB), lymphocyte (LYM), hemoglobin (Hb) and NRS-2002 scores in the normal exercise group were higher than those in the dyskinesia group (t=2.219, 3.911, 2.172, 1.989, 5.754、6.746, P < 0.05), and MNA-SF scores were lower than those in the gait disorder group (t=6.049, P < 0.05). The results of NRS-2002 score screening showed normal nutrition in 33 cases (28.7%), malnutrition risk in 67 cases (58.3%) and malnutrition in 15 cases (13.0%). The results of MNA-SF score screening showed: 47 cases (40.9%) with normal nutrition, 48 cases (41.7%) with risk of malnutrition, and 20 cases (17.4%) with malnutrition.There were statistically significant differences in age, BMI, ALB, PA, LYM and Hb(F=4.741、F=11.632、F =9.391、F =6.167、Z=4.112、F=15.538, all P<0.05). There were statistically significant differences in age, BMI, ALB, PA and Hb in the mna-sf score group (t=4.435, 12.182, 16.925, 4.006, 6.746, P < 0.05). NRS-2002 score were negatively correlated with MNA-SF score (r=-0.534, P=0.000). NRS-2002 score were negatively correlated with BMI, ALB and Hb (r=-0.211, -0.173, -0.258, all P <0.05), and weakly negatively correlated with LYM and PA (r=-0.051, -0.009, P <0.05). MNA-SF score were positively correlated with BMI, ALB, and Hb (r=0.303, 0.285, 0.204, all P < 0.05). The results of multiple Logistic regression correction model showed that MNA-SF score [OR=3.970, 95%CI (1.704, 9.202) ] and age [OR=1.274, 95%CI ( 1.036, 1.568) ] were correlated with the occurrence of walking disorder (P < 0.05).

This study has confirmed a higher incidence of preoperative malnutrition or risk in patients with hip OA. Nutrition status is correlated with early postoperative motor function. MNA-SF score may be more suitable for screening preoperative nutritional status of patients with hip OA.