Health-related quality-of-life outcomes in patients with preoperative cervical lordosis greater than 10° (lordotic).
| Outcome Measure | 1-Level (n = 18) | 2-Level (n = 17) | 3-Level (n = 29) | P Value | Regression Analysisa |
| Physical component of short form-12 | |||||
| Preoperative | 33.6 (28.7, 38.5) | 31.5 (28.3, 34.8) | 30.1 (25.2, 34.9) | 0.78 | β: 2.09 (−2.56, 6.75) P = 0.37 |
| Postoperative | 37.0 (30.5, 43.6) | 40.9 (35.8, 45.9) | 36.9 (32.3, 41.5) | 0.47 | |
| Delta | 3.6 (−2.2, 9.4) | 8.7 (2.8, 14.6) | 6.0 (−0.5, 12.5) | 0.57 | |
| P value | 0.20 | 0.01 | 0.01 | ||
| Mental component of short form-12 | |||||
| Preoperative | 48.1 (42.2, 54.1) | 49.3 (44.6, 54.0) | 47.1 (40.5, 53.6) | 0.96 | β: −1.14 (−6.15, 3.87) P = 0.65 |
| Postoperative | 53.0 (47.5, 58.5) | 56.4 (51.9, 60.9) | 50.7 (46.3, 55.1) | 0.15 | |
| Delta | 3.6 (−5.0, 12.2) | 6.4 (0.3, 12.6) | 4.1 (−1.7, 9.8) | 0.64 | |
| P value | 0.40 | 0.04 | 0.31 | ||
| Neck Disability Index | |||||
| Preoperative | 41.1 (28.3, 53.9) | 34.4 (26.0, 42.7) | 34.2 (27.5, 40.9) | 0.64 | β: 5.14 (−12.21, 22.49) P = 0.53 |
| Postoperative | 18.5 (−24.1, 61.1) | 19.0 (0.4, 45.7) | 26.2 (16.6, 35.7) | 0.62 | |
| Delta | −21.3 (−49.6, 6.9) | −19.0 (−41.0, −0.2) | −7.9 (−25.6, 9.8) | 0.70 | |
| P value | 0.11 | 0.18 | 0.02 | ||
| VAS arm | |||||
| Preoperative | 6.4 (4.8, 7.6) | 6.7 (5.6, 7.7) | 2.9 (1.1, 4.9) | 0.01 | β: 0.99 (−0.44, 2.42) P = 0.17 |
| Postoperative | 2.7 (1.3, 4.0) | 2.2 (0.6, 3.8) | 1.7 (0.5, 2.9) | 0.20 | |
| Delta | −4.2 (–5.8, –2.6) | –5.5 (–7.4, –3.7) | –1.3 (–3.6, 0.7) | 0.01 | |
| P value | 0.003 | 0.02 | 0.58 | ||
| VAS neck | |||||
| Preoperative | 6.1 (4.5, 7.8) | 5.7 (3.7, 7.8) | 4.8 (3.1, 6.5) | 0.29 | β: 0.79 (−0.78, 2.36) P = 0.31 |
| Postoperative | 0.6 (−0.1, 1.3) | 1.0 (−0.1, 2.1) | 2.2 (1.1, 3.4) | 0.04 | |
| Delta | –5.5 (–7.1, –3.8) | –5.7 (–7.8, –3.5) | –2.6 (–5.1, –0.1) | 0.07 | |
| P value | 0.003 | 0.03 | 0.02 |
Abbreviation: VAS, Visual Analog Scale.
Note: Significance achieved at P < 0.05.
↵a Regression analysis controlled for age, body mass index, Charlson Comorbidity Index, and preoperative diagnosis.