Data from: Preoperative characteristics of working-age patients undergoing total knee arthroplasty

Objective
Total Knee Arthroplasty (TKA) is performed more in working-age (<65 years) patients. Until now, research in this patient population has been conducted mainly among retired (≥65 years) patients. Aim of this study was therefore to describe demographic, physical, psychological and social characteristics of working TKA patients and to subsequently compare these characteristics with retired TKA patients and the general population.
Methods
A cross-sectional analysis. Preoperative data of 152 working TKA patients was used. These data were compared with existing data of retired TKA patients in hospital registers and with normative values from literature on the general population. Demographic, physical, psychological and social (including work) characteristics were analyzed.
Results
The majority (83.8%) of working TKA patients was overweight (42.6%) or obese (41.2%), a majority (72.4%) was dealing with two or more comorbidities, and most (90%) had few depressive symptoms. Mean physical activity level was 2950 minutes per week. Compared to the retired TKA population, working TKA patients perceived significantly more stiffness and better physical functioning and vitality, were more physically active, and perceived better mental health. Compared to the general population working TKA patients perceived worse physical functioning, worse physical health and better mental health, and worked fewer hours.
Conclusion
This study shows that a majority of working TKA patients are overweight/obese, have multiple comorbidities, but are highly active in light-intensity activities and have few depressive symptoms. Working patients scored overall better on preoperative characteristics than retired patients, and except for physical activity scored overall worse than the general population.

研究目的
全膝关节置换术（Total Knee Arthroplasty, TKA）在劳动年龄（<65岁）患者中的应用更为广泛。迄今为止，针对该患者群体的相关研究多以退休（≥65岁）患者为研究对象。因此本研究旨在明确劳动年龄TKA患者的人口学、躯体、心理及社会特征，并进一步将这些特征与退休TKA患者及普通人群进行对比分析。

研究方法
本研究采用横断面分析设计，纳入152名劳动年龄TKA患者的术前数据，并将其与医院登记库中退休TKA患者的既往数据，以及普通人群相关文献中的标准参考值进行对照分析。研究分析了受试者的人口学、躯体、心理及社会（含工作相关）特征。

研究结果
83.8%的劳动年龄TKA患者存在超重（42.6%）或肥胖（41.2%）情况，72.4%的患者合并两种及以上共病，且绝大多数（90%）仅存在轻度抑郁症状。受试者的平均每周体力活动时长为2950分钟。与退休TKA患者群体相比，劳动年龄TKA患者自述关节僵硬程度更显著、躯体功能与活力更佳，体力活动水平更高，心理健康状态更优。与普通人群相比，劳动年龄TKA患者的躯体功能与躯体健康状况更差，但心理健康状态更佳，且每周工作时长更短。

研究结论
本研究显示，绝大多数劳动年龄TKA患者存在超重或肥胖问题，且合并多种共病，但他们的轻强度体力活动参与度较高，仅存在轻度抑郁症状。劳动年龄TKA患者的术前整体特征优于退休TKA患者；除体力活动水平外，其整体特征均差于普通人群。