Abstract
Introduction
The clinical outcomes of single, multi-level and Hybrid cervical disc arthroplasty are reported in the literature. However, there is less detail on the outcome results related to age and sex on these groups. We reviewed 405 patients who had single level, multi-level (two, three & four) and Hybrid cervical disc arthroplasty at our center.
Methods
The study involved a retrospective review of prospectively collected data on single level, multi-level (two, three & four) and Hybrid cervical disc arthroplasty patients with an average age of 54.64 (range: 34–80). 405 patients were followed up for 2 to 8 years based on clinical outcomes scores. These included NDI (Neck Disability Index), Visual Analogue score for Neck (VAS Neck), and Visual Analogue score for Arm (VAS Arm). Scores were collected pre-operatively and at each follow up at 3 months, 6 months, 1st and yearly afterwards. Linear Regression Analysis was performed to look at the impact of age and Two sample T-Test was used to look at the difference between males and females.
Results
The study consisted of 215 females and 190 males. The duration of symptoms was on an average 60 months. The indication for surgery was radiculopathy and a combination of radiculopathy and myelopathy. Linear Regression Analysis for NDI and age showed a Pearson correlation r of 0.002; P Value: 0.968; for sex difference - P value of 0.730 showed no statistically significant differences between male and female groups. For VAS Neck, the Pearson correlation was r = 0.008; P Value: 0.873; for sex difference – P value of 0.178 showed no statistically significant differences between male and female groups. For VAS Arm, the Pearson correlation was r = 0.064; P Value: 0.198; for sex difference – P value of 0.953 showed no statistically significant differences between male and females.
Conclusion
Our results suggest that there is no correlation between age of the patient and their NDI, VAS Neck and VAS Arm scores for all groups of Cervical Disc Arthroplasty. Similarly, there were no statistically significant differences in the outcomes between males and females.