1. Glassman SD, Bridwell K, Dimar JR, Horton W, Berven S, Schwab F. The impact of positive sagittal balance in adult spinal deformity. Spine (Phila Pa 1976) 2005 30:2024–2029. PMID:
16166889.
2. Glassman SD, Berven S, Bridwell K, Horton W, Dimar JR. Correlation of radiographic parameters and clinical symptoms in adult scoliosis. Spine (Phila Pa 1976) 2005 30:682–688. PMID:
15770185.
3. Schwab FJ, Smith VA, Biserni M, Gamez L, Farcy JP, Pagala M. Adult scoliosis: a quantitative radiographic and clinical analysis. Spine (Phila Pa 1976) 2002 27:387–392. PMID:
11840105.
4. Schwab F, Farcy JP, Bridwell K, et al. A clinical impact classification of scoliosis in the adult. Spine (Phila Pa 1976) 2006 31:2109–2114. PMID:
16915098.
5. Lafage V, Schwab F, Patel A, Hawkinson N, Farcy JP. Pelvic tilt and truncal inclination: two key radiographic parameters in the setting of adults with spinal deformity. Spine (Phila Pa 1976) 2009 34:E599–E606. PMID:
19644319.
6. Oe S, Togawa D, Nakai K, et al. The influence of age and sex on cervical spinal alignment among volunteers aged over 50. Spine (Phila Pa 1976) 2015 40:1487–1494. PMID:
26208229.
7. Tang JA, Scheer JK, Smith JS, et al. The impact of standing regional cervical sagittal alignment on outcomes in posterior cervical fusion surgery. Neurosurgery 2012 71:662–669. PMID:
22653395.
8. Chavanne A, Pettigrew DB, Holtz JR, Dollin N, Kuntz Ct. Spinal cord intramedullary pressure in cervical kyphotic deformity: a cadaveric study. Spine (Phila Pa 1976) 2011 36:1619–1626. PMID:
21289583.
9. Shamji MF, Ames CP, Smith JS, Rhee JM, Chapman JR, Fehlings MG. Myelopathy and spinal deformity: relevance of spinal alignment in planning surgical intervention for degenerative cervical myelopathy. Spine (Phila Pa 1976) 2013 38(22 Suppl 1): S147–S148. PMID:
23963013.
10. Smith JS, Lafage V, Ryan DJ, et al. Association of myelopathy scores with cervical sagittal balance and normalized spinal cord volume: analysis of 56 preoperative cases from the AOSpine North America Myelopathy study. Spine (Phila Pa 1976) 2013 38(22 Suppl 1): S161–S170. PMID:
23963001.
11. Fehlings MG, Tetreault LA, Wilson JR, Skelly AC. Cervical spondylotic myelopathy: current state of the art and future directions. Spine (Phila Pa 1976) 2013 38(22 Suppl 1): S1–S8. PMID:
23962994.
12. Smith JS, Lafage V, Schwab FJ, et al. Prevalence and type of cervical deformity among 470 adults with thoracolumbar deformity. Spine (Phila Pa 1976) 2014 39:E1001–E1009. PMID:
24859571.
13. Genant HK, Wu CY, van Kuijk C, Nevitt MC. Vertebral fracture assessment using a semiquantitative technique. J Bone Miner Res 1993 8:1137–1148. PMID:
8237484.
14. Tsuchiya A, Ikeda S, Ikegami N, et al. Estimating an EQ-5D population value set: the case of Japan. Health Econ 2002 11:341–353. PMID:
12007165.
15. Scheer JK, Tang JA, Smith JS, et al. Cervical spine alignment, sagittal deformity, and clinical implications: a review. J Neurosurg Spine 2013 19:141–159. PMID:
23768023.
16. Ames CP, Smith JS, Eastlack R, et al. Reliability assessment of a novel cervical spine deformity classification system. J Neurosurg Spine 2015 23:673–683. PMID:
26273762.
17. Passias PG, Soroceanu A, Smith J, et al. Postoperative cervical deformity in 215 thoracolumbar patients with adult spinal deformity: prevalence, risk factors, and impact on patient-reported outcome and satisfaction at 2-year follow-up. Spine (Phila Pa 1976) 2015 40:283–291. PMID:
25901975.
18. Banno T, Togawa D, Arima H, et al. The cohort study for the determination of reference values for spinopelvic parameters (T1 pelvic angle and global tilt) in elderly volunteers. Eur Spine J 2016 25:3687–3693. PMID:
26831540.
19. Yoshida G, Yasuda T, Togawa D, et al. Craniopelvic alignment in elderly asymptomatic individuals: analysis of 671 cranial centers of gravity. Spine (Phila Pa 1976) 2014 39:1121–1127. PMID:
24732852.
20. Ames CP, Blondel B, Scheer JK, et al. Cervical radiographical alignment: comprehensive assessment techniques and potential importance in cervical myelopathy. Spine (Phila Pa 1976) 2013 38(22 Suppl 1): S149–S160. PMID:
24113358.
21. Siemionow K, An H, Masuda K, Andersson G, Cs-Szabo G. The effects of age, sex, ethnicity, and spinal level on the rate of intervertebral disc degeneration: a review of 1712 intervertebral discs. Spine (Phila Pa 1976) 2011 36:1333–1339. PMID:
21217432.
22. Yukawa Y, Kato F, Suda K, Yamagata M, Ueta T. Age-related changes in osseous anatomy, alignment, and range of motion of the cervical spine. Part I: Radiographic data from over 1,200 asymptomatic subjects. Eur Spine J 2012 21:1492–1498. PMID:
22310883.
23. Protopsaltis TS, Scheer JK, Terran JS, et al. How the neck affects the back: changes in regional cervical sagittal alignment correlate to HRQOL improvement in adult thoracolumbar deformity patients at 2-year follow-up. J Neurosurg Spine 2015 23:153–158. PMID:
25978077.
24. Park MS, Moon SH, Lee HM, et al. The effect of age on cervical sagittal alignment: normative data on 100 asymptomatic subjects. Spine (Phila Pa 1976) 2013 38:E458–E463. PMID:
23354112.
25. Boden SD, McCowin PR, Davis DO, Dina TS, Mark AS, Wiesel S. Abnormal magnetic-resonance scans of the cervical spine in asymptomatic subjects: a prospective investigation. J Bone Joint Surg Am 1990 72:1178–1184. PMID:
2398088.
26. Okada E, Matsumoto M, Ichihara D, et al. Does the sagittal alignment of the cervical spine have an impact on disk degeneration? Minimum 10-year follow-up of asymptomatic volunteers. Eur Spine J 2009 18:1644–1651. PMID:
19609784.
27. Vernon H, Mior S. The Neck Disability Index: a study of reliability and validity. J Manipulative Physiol Ther 1991 14:409–415. PMID:
1834753.