Document Classification

Section Type: METHODS

Text: In fixed-bearing prosthesis group, there were 8 males and 29 females with an average age of 69. 6 years (range, 57-76 years), weighing from 55 to 92 kg (mean, 66. 7 kg) ; the locations were the left knee in 20 cases and the right knee in 17 cases ; the body mass index (BMI) ranged from 17. 6 to 37. 3 (mean, 26. 2) ; the disease duration was 3-22 years ; the Knee Society Score (KSS) knee score, function score, patellar score, and pain score were 29. 4 + / - 15. 3, 33. 4 + / - 16. 8, 7. 2 + / - 2. 5, and 2. 5 + / - 2. 2 respectively ; and the Insall-Salvati (I-S) index was 1. 6 + / - 0. 3.