Document Classification

Section Type: RESULTS

Text: Patients in all four groups had improvement in the postoperative neurological status and gait function ; at twenty-four months after surgery, 90 % (95 % confidence interval, 77. 8 % to 96. 6 %) of the patients in the arthroplasty group and 81 % (95 % confidence interval, 64. 9 % to 92. 0 %) of those in the arthrodesis group had improvement in or maintenance of the neurological status in the Prestige ST trial and 90 % (95 % confidence interval, 75. 8 % to 97. 1 %) of the patients in the arthroplasty group and 77 % (95 % confidence interval, 57. 7 % to 90. 1 %) of those in the arthrodesis group had improvement in or maintenance of the neurological status in the Bryan trial.