Variables | Good (n = 66) | Poor (n = 20) | p value |
---|---|---|---|
Age at surgery (years) | 57.1 ± 8.8 | 63.4 ± 9.2 | < 0.001 |
Female, n (%) | 35 (53%) | 11 (55%) | 0.877 |
BMI (kg m−2) | 23.5 ± 3.6 | 24.6 ± 4.1 | 0.309 |
Duration of symptoms (months) | 11.6 ± 7.5 | 16.3 ± 11.8 | 0.002 |
T1 slope (°) | 14.3 ± 2.4 | 17.8 ± 3.2 | 0.001 |
C2–7 SVA (mm) | 17.6 ± 10.2 | 19.1 ± 9.4 | 0.266 |
Involved levels, n (%) | 0.762 | ||
C2–5 | 13 (19.7%) | 4 (20%) | |
C3–6 | 31 (47%) | 11 (55%) | |
C4–7 | 22 (33.3%) | 5 (25%) | |
JOA score | |||
Preoperative | 8.1 ± 2.2 | 7.5 ± 2.6 | 0.641 |
Postoperative | 12.1 ± 3.7 | 10.9 ± 3.3 | 0.131 |
Last follow-up* | 14.3 ± 2.9 | 10.1 ± 1.5 | < 0.001 |
Recovery rate, % | 64.7 ± 18.3 | 34.9 ± 10.5 | < 0.001 |
C2–7 ROM (°) | 38.2 ± 12.7 | 39.5 ± 13.0 | 0.891 |
C2–7 Cobb (°) | |||
Preoperative | − 10.7 ± 5.5 | − 11.3 ± 6.2 | 0.219 |
Postoperative | 7.1 ± 4.4 | 6.9 ± 5.0 | 0.774 |
Last follow-up | 6.3 ± 5.7 | 5.6 ± 4.9 | 0.428 |
Change of C2–7 (pre and last) | 12.4 ± 8.7 | 13.1 ± 9.5 | 0.138 |
LKA (°) | |||
Preoperative | − 13.7 ± 10.5 | − 11.3 ± 9.2 | 0.736 |
Postoperative | 5.1 ± 7.2 | 4.8 ± 6.3 | 0.552 |
Last follow-up | 5.6 ± 3.9 | 0.3 ± 5.4 | 0.003 |
CLA (pre and last) | 12.1 ± 7.7 | 8.7 ± 6.5 | < 0.001 |
WPLA, n (%) | 10 (15.1%) | 7 (35%) | 0.032 |
Implant subsidence > 3 mm, n (%) | 6 (9%) | 2 (10%) | 0.817 |