title: Factors favoring regain of the lost vertical spinal height through posterior spinal fusion in adolescent idiopathic scoliosis.
abstract: Height gain is a common beneficial consequence following correction surgery in adolescent idiopathic scoliosis (AIS), yet little is known concerning factors favoring regain of the lost vertical spinal height (SH) through posterior spinal fusion. A consecutive series of AIS patients from February 2013 to August 2015 were reviewed. Surgical changes in SH (ΔSH), as well as the multiple coronal and sagittal deformity parameters were measured and correlated. Factors associated with ΔSH were identified through Pearson correlation analysis and multivariate regression analysis. A total of 172 single curve and 104 double curve patients were reviewed. The ΔSH averaged 2.5 ± 0.9 cm in single curve group and 2.9 ± 1.0 cm in double curve group. The multivariate regression analysis revealed the following pre-operative variables contributed significantly to ΔSH: pre-op Cobb angle, pre-op TK (single curve group only), pre-op GK (double curve group only) and pre-op LL (double curve group only) (p < 0.05). Thus change in height (in cm) = 0.044 × (pre-op Cobb angle) + 0.012 × (pre-op TK) (Single curve, adjusted R(2) = 0.549) or 0.923 + 0.021 × (pre-op Cobb angle1) + 0.028 × (pre-op Cobb angle2) + 0.015 × (pre-op GK)-0.012 × (pre-op LL) (Double curve, adjusted R(2) = 0.563). Severer pre-operative coronal Cobb angle and greater sagittal curves were beneficial factors favoring more contribution to the surgical lengthening effect in vertical spinal height in AIS.
authors.affiliation: Spine Surgery, the Affiliated Drum Tower Hospital of Nanjing University Medical School, Nanjing, China.|Joint Scoliosis Research Center of the Chinese University of Hong Kong &Nanjing University, Nanjing, China.
authors.forename: Benlong
authors.initials: B
authors.lastname: Shi
authors.affiliation: Spine Surgery, the Affiliated Drum Tower Hospital of Nanjing University Medical School, Nanjing, China.|Joint Scoliosis Research Center of the Chinese University of Hong Kong &Nanjing University, Nanjing, China.
authors.forename: Saihu
authors.initials: S
authors.lastname: Mao
authors.affiliation: Spine Surgery, the Affiliated Drum Tower Hospital of Nanjing University Medical School, Nanjing, China.|Joint Scoliosis Research Center of the Chinese University of Hong Kong &Nanjing University, Nanjing, China.
authors.forename: Leilei
authors.initials: L
authors.lastname: Xu
authors.affiliation: Spine Surgery, the Affiliated Drum Tower Hospital of Nanjing University Medical School, Nanjing, China.|Joint Scoliosis Research Center of the Chinese University of Hong Kong &Nanjing University, Nanjing, China.
authors.forename: Xu
authors.initials: X
authors.lastname: Sun
authors.affiliation: Spine Surgery, the Affiliated Drum Tower Hospital of Nanjing University Medical School, Nanjing, China.|Joint Scoliosis Research Center of the Chinese University of Hong Kong &Nanjing University, Nanjing, China.
authors.forename: Zhen
authors.initials: Z
authors.lastname: Liu
authors.affiliation: Spine Surgery, the Affiliated Drum Tower Hospital of Nanjing University Medical School, Nanjing, China.|Joint Scoliosis Research Center of the Chinese University of Hong Kong &Nanjing University, Nanjing, China.
authors.forename: Zezhang
authors.initials: Z
authors.lastname: Zhu
authors.affiliation: Joint Scoliosis Research Center of the Chinese University of Hong Kong &Nanjing University, Nanjing, China.|Department of Orthopaedics and Traumatology, Chinese University of Hong Kong, Hong Kong, China.
authors.forename: Tsz Ping
authors.initials: TP
authors.lastname: Lam
authors.affiliation: Joint Scoliosis Research Center of the Chinese University of Hong Kong &Nanjing University, Nanjing, China.|Department of Orthopaedics and Traumatology, Chinese University of Hong Kong, Hong Kong, China.
authors.forename: Jack Cy
authors.initials: JC
authors.lastname: Cheng
authors.affiliation: Joint Scoliosis Research Center of the Chinese University of Hong Kong &Nanjing University, Nanjing, China.|Department of Orthopaedics and Traumatology, Chinese University of Hong Kong, Hong Kong, China.
authors.forename: Bobby
authors.initials: B
authors.lastname: Ng
authors.affiliation: Spine Surgery, the Affiliated Drum Tower Hospital of Nanjing University Medical School, Nanjing, China.|Joint Scoliosis Research Center of the Chinese University of Hong Kong &Nanjing University, Nanjing, China.
authors.forename: Yong
authors.initials: Y
authors.lastname: Qiu
mesh_terms: D000293:Adolescent; D005260:Female; D006801:Humans; D008297:Male; D015999:Multivariate Analysis; D012044:Regression Analysis; D012600:Scoliosis / Q000473:pathology* / Q000601:surgery*; D013123:Spinal Fusion; D013131:Spine / Q000473:pathology* / Q000601:surgery*