Health-related quality-of-life outcomes stratified by postoperative correction of cervical lordosis.
| Outcome Measure | Maintained (n = 177) | Restored (n = 101) | Kyphotic (n = 30) | P Valuea |
| Physical component of short form-12 | ||||
| Preoperative | 32.6 (30.2, 35.0) | 35.5 (32.0, 39.0) | 35.0 (28.1, 41.9) | 0.32 |
| Postoperative | 41.6 (38.4, 44.8) | 45.8 (41.9, 49.6) | 36.6 (29.1, 44.1) | 0.02 |
| Delta | 9.0 (5.4, 12.6) | 10.3 (7.0, 13.5) | 1.5 (−7.8, 10.8) | 0.04 |
| P value | <0.001 | <0.001 | 0.01 | |
| Mental component of short form-12 | ||||
| Preoperative | 49.0 (45.3, 52.7) | 46.7 (43.0, 50.3) | 49.1 (41.7, 56.5) | 0.86 |
| Postoperative | 50.8 (47.2, 54.3) | 45.2 (38.8, 51.6) | 51.4 (43.5, 59.3) | 0.73 |
| Delta | 1.8 (−2.8, 6.3) | −1.4 (−7.7, 4.9) | 2.3 (−5.8, 10.3) | 0.68 |
| P value | 0.04 | 0.22 | 0.07 | |
| Neck Disability Index | ||||
| Preoperative | 36.8 (31.6, 42.0) | 43.0 (34.7, 51.4) | 35.6 (28.8, 42.4) | 0.65 |
| Postoperative | 23.8 (17.6, 30.2) | 28.0 (18.2, 37.8) | 17.4 (8.8, 26.0) | 0.65 |
| Delta | −13.0 (−19.8, −6.1) | −14.8 (−27.0, −2.6) | −18.2 (−25.8, −10.5) | 0.89 |
| P value | <0.001 | <0.001 | 0.002 | |
| VAS arm | ||||
| Preoperative | 3.3 (2.1, 4.4) | 5.3 (3.8, 6.8) | 2.8 (0.9, 4.9) | 0.02 |
| Postoperative | 2.3 (1.3, 3.3) | 1.5 (0.6, 2.4) | 2.3 (0.6, 4.1) | 0.93 |
| Delta | −0.9 (−2.0, 0.1) | −3.8 (−5.1, −2.6) | −0.6 (−2.8, 1.5) | 0.03 |
| P value | <0.001 | <0.001 | 0.01 | |
| VAS neck | ||||
| Preoperative | 5.1 (4.1, 6.1) | 5.3 (4.0, 6.6) | 6.4 (5.4, 7.3) | 0.31 |
| Postoperative | 2.2 (1.3, 3.1) | 2.0 (0.7, 3.2) | 3.5 (1.0, 6.1) | 0.23 |
| Delta | −2.9 (−4.3, −1.5) | −3.3 (−5.0, −1.7) | −2.8 (−5.2, −0.4) | 0.26 |
| P value | <0.001 | <0.001 | 0.002 |
Abbreviation: VAS, visual analog scale.
Note: Significance achieved at P < 0.05.
↵a Multiple linear regression analysis was done between groups controlling for age, body mass index, Charlson Comorbidity Index, and preoperative diagnosis.