Table 1 The aggravation of VS and SAS based on pre-existing cervical spine instability in 233 patients at > 10-year follow-up.
Aggravated instability | Pre-existing instability | Aggravation | p | |||
|---|---|---|---|---|---|---|
n | n | % | ||||
VS | AAS | (+) | 71 | 26 | 36.6 | 0.007‡ |
(−) | 117 | 22 | 18.8 | |||
VS | (+) | 45 | 22 | 48.9 | 0.002‡ | |
(−) | 188 | 48 | 25.5 | |||
SAS | (+) | 18 | 7 | 38.9 | 0.394 | |
(−) | 215 | 63 | 29.3 | |||
SAS | AAS | (+) | 71 | 26 | 36.6 | 0.182 |
(−) | 117 | 32 | 27.4 | |||
VS | (+) | 45 | 25 | 55.6 | 0.002‡ | |
(−) | 188 | 58 | 30.9 | |||
SAS | (+) | 18 | 9 | 50.0 | 0.184 | |
(−) | 215 | 74 | 34.4 | |||
