Table 5.
Summary of strength of evidence with short-term followup
| Outcome | Studies (number) | Strength of evidence | Summary |
|---|---|---|---|
| Neurologic success | 5 | Moderate | Benefit in favor of CDA |
| NDI | 5 | Moderate | Benefit in favor of CDA |
| Neck and arm pain | |||
| VAS neck pain | 2 | Very low | No statistical difference in outcome |
| NRS neck pain | 3 | Moderate | No statistical difference in outcome |
| VAS arm pain | 3 | Very low | No statistical difference in outcome |
| NRS arm pain | 3 | Moderate | No statistical difference in outcome |
| SF-36 | |||
| PCS | 3 | Moderate | No statistical difference in outcome |
| MCS | 2 | Moderate | No statistical difference in outcome |
| ROM | |||
| Index segment | 4 | Low | Benefit in favor of CDA |
| Adjacent levels | 2 | Moderate | No statistical difference in outcome |
| Reoperation | |||
| Related to index surgery | 5 | Low | Benefit in favor of CDA |
| At adjacent levels | 5 | Low | No statistical difference in outcome |
| Complications | 5 | Low | Benefit in favor of CDA |
CDA = cervical disc arthroplasty; NDI = neck disability index; NRS = numerical rating scale; PCS = physical component score; MCS = mental component score.