Newcastle Hospitals NHS Trust, Freeman Road, Newcastle upon Tyne, NE7 7DN, UK.
South Tees Hospitals, James Cook Hospital, Marton Road, Middlesbrough, TS4 3BW, UK.
Knee Surg Sports Traumatol Arthrosc. 2017 Sep;25(9):2676-2681. doi: 10.1007/s00167-015-3914-z. Epub 2015 Dec 30.
The aim was to investigate the interplay between patient characteristics and (1) length of hospital stay and (2) one-year patient-reported outcome following total knee and hip arthroplasty.
Event (survival) analysis and structural equation modelling were performed for 1001 patients undergoing knee (n = 566) and hip (n = 435) arthroplasty in a single institution.
Age, body mass index and co-morbidities were independent predictors of length of stay in both event analysis and structural equation modelling. These patient characteristics and type of arthroplasty had both small direct and indirect effects on patient-reported outcome measures at one year. Length of stay had a small effect (<2 %) in SF-36 scores at one year.
Predictors that influence length of stay also impact on one-year post-operative outcome and therefore should be taken into account during patient selection and discharge planning.
Retrospective cohort study, Level III.
旨在探讨患者特征与（1）全膝关节和髋关节置换术后住院时间和（2）一年患者报告结果之间的相互作用。
对单家机构中接受膝关节（n=566）和髋关节（n=435）置换术的 1001 名患者进行事件（生存）分析和结构方程建模。
年龄、体重指数和合并症是事件分析和结构方程建模中住院时间的独立预测因素。这些患者特征和关节置换类型对一年时的患者报告结果测量均具有较小的直接和间接影响。住院时间对一年时 SF-36 评分的影响较小（<2%）。
影响住院时间的预测因素也会影响一年后的手术结果，因此在患者选择和出院计划中应考虑这些因素。
回顾性队列研究，III 级。
