[Objective]To investigate the relationship between preoperative activity and postoperative lower extremity function after to-tal hip arthroplasty.[Methods]A total of 66 patients who underwent total hip replacement were selected as the study objects.The activity level of the week before surgery was assessed according to the international physical activity questionnaire.Forty-four patients with activity level ≥1 000 kcal were classified as the activity group,and the other 22 patients with activity level＜1 000 kcal were classified as the low ac-tivity group.The preoperative and postoperative data of the two groups were compared.[Results]The activity group demonstrated significant-ly higher levels of physical activity one week prior to surgery[(3 513.0±2 840.0)kcal vs(429.0±312.0)kcal,P＜0.001],shorter time to walk 10 meters preoperatively[(7.7±2.4)s vs(10.4±8.3)s,P=0.049],lower VAS scores at 2 months postoperatively[(1.6±0.8)vs(2.2±1.1),P=0.014],greater hip abduction strength at 2 months postoperatively[(82.1±29.5)％vs(67.1±25.9)％,P=0.047],higher Harris scores preopera-tively[(54.7±10.2)vs(47.8±10.3),P=0.012],and higher Harris scores at 2 months postoperatively[(75.0±7.3)vs(65.7±8.1),P＜0.001]com-pared to the less active group.There were no significant differences between the two groups in terms of age,gender,disease duration,BMI,10-meter walk time at 2 months postoperatively,preoperative VAS pain score,preoperative abduction strength,preoperative and postopera-tive 2-months hip flexion-extension range of motion(ROM),and hip internal-external rotation ROM(P＞0.05).In terms of correlation analy-sis,the activity level 1 week before surgery was significantly negatively correlated with the 10 m walking time before surgery(r=-0.223,P=0.032),but had no correlation with the 10 m walking time after surgery(P＞0.05);not correlated with the preoperative VAS scores(P＞0.05),but there was a significant negative correlation with postoperative VAS score(r=-0.291,P=0.021).The activity level 1 week before surgery was not correlation with preoperative hip abduction muscle strength(P＞0.05),but was significantly positively correlated with postoperative hip abductor muscle strength(r=0.337,P=0.012);nor correlated with the preoperative and postoperative hip extension ROM and the inter-nal-external rotation ROM(P＞0.05),but significantly positively correlated with Harris scores before surgery(r=0.293,P=0.019)and 2 months after surgery(r=0.389,P=0.003).[Conclusion]Preoperative activity of THA patients is correlated with Harris hip function,VAS score and abductor muscle strength.High preoperative activity is conducive to postoperative recovery.
hip osteoarthritistotal hip replacementInternational Physical Activity QuestionnaireHarris scorerange of motion
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