The Outcomes of Subject After Total Knee Arthroplasty

Primary outcomes

1. Changes of Western Ontario and McMaster Universities Arthritis Index (WOMAC)

   Time frame: Baseline: date of surgery (day 0); discharge from hospital (D/C), an average of 1 week; 1 month after D/C; 3 months after D/C; 6 months after D/C

   The Western Ontario and McMaster Universities Arthritis Index (WOMAC) is widely used in the evaluation of Hip and Knee Osteoarthritis. It is a self-administered questionnaire consisting of 24 items divided into 3 subscales:

   (I). Pain (5 items): during walking, using stairs, in bed, sitting or lying, and standing upright (II). Stiffness (2 items): after first waking and later in the day (III). Physical Function (17 items): using stairs, rising from sitting, standing, bending, walking, getting in / out of a car, shopping, putting on / taking off socks, rising from bed, lying in bed, getting in / out of bath, sitting, getting on / off toilet, heavy domestic duties, light domestic duties.

   The assessment was performed at: Baseline: admission date of surgery, discharge from hospital (D/C), 1 month after D/C, 3 months after D/C, 6 months after D/C

2. Changes of knee Range of motion (ROM)

   Time frame: Baseline: date of surgery (day 0); discharge from hospital (D/C), an average of 1 week; 1 month after D/C; 3 months after D/C; 6 months after D/C

   Range of motion in bilateral Knee joints