title: Profiles of and correlation between objective and subjective outcome assessments following open-door laminoplasty for cervical spondylotic myelopathy.
abstract: BACKGROUND
  Open-door laminoplasty is widely used in the treatment of cervical spondylotic myelopathy (CSM). This study aimed to investigate the profiles of and correlation between objective and subjective short-term outcome assessments after open-door laminoplasty for CSM.
  
  
  METHODS
  We retrospectively analyzed surgical outcomes in 129 consecutive CSM patients who underwent open-door laminoplasty in Peking University Third Hospital from February 2008 to November 2011. Both objective and subjective assessments were evaluated before surgery, 3 months after surgery, and 1 year after surgery. We then analyzed the profiles of and correlation between objective and subjective short-term outcomes.
  
  
  RESULTS
  The Modified Japanese Orthopaedic Association (mJOA) score was significantly improved at 3 months (P < 0.01) and 1 year (P < 0.01) after surgery. Bivariate Logistic regression showed that sensory improvement contributed more to the recovery rate than motor function improvement at 3 months after surgery, while motor function contributed more to the recovery rate at 1 year after surgery. On the subjective assessment (the short form (SF)-36 ), there was no significant improvement at 3 months after surgery (P > 0.05), while physical function (PF), role-physical (RP), and social function (SF) were notably improved at 1 year after surgery (P < 0.01). Improved mJOA score correlated with improvements in PF, RP, bodily pain, general health (GH), vitality (VT), and SF (P < 0.05) at 3 months after surgery; PF, GH, VT, and SF were associated with improved mJOA scores at 1 year after surgery.
  
  
  CONCLUSIONS
  Patients benefit from surgery by postoperative restitution of neurological function with early recovery of sensory function, followed by a gradual transition to motor function improvement. At the early stage of recovery, improvement in the mJOA score essentially correlated with improvements in the physical domains of the SF-36, while at the later stage, mJOA score improvement was associated with improvements in both mental and physical domains of the SF-36.
authors.affiliation: Department of Orthopedics, Peking University Third Hospital, Beijing 100191, China.
authors.forename: Feifei
authors.initials: F
authors.lastname: Zhou
authors.affiliation: Department of Orthopedics, Peking University Third Hospital, Beijing 100191, China.
authors.forename: Yilong
authors.initials: Y
authors.lastname: Zhang
authors.affiliation: Department of Orthopedics, Peking University Third Hospital, Beijing 100191, China. Email: sunyuor@vip.sina.com.
authors.forename: Yu
authors.initials: Y
authors.lastname: Sun
authors.affiliation: Department of Orthopedics, Peking University Third Hospital, Beijing 100191, China.
authors.forename: Fengshan
authors.initials: F
authors.lastname: Zhang
authors.affiliation: Department of Orthopedics, Peking University Third Hospital, Beijing 100191, China.
authors.forename: Shengfa
authors.initials: S
authors.lastname: Pan
authors.affiliation: Department of Orthopedics, Peking University Third Hospital, Beijing 100191, China.
authors.forename: Yinze
authors.initials: Y
authors.lastname: Diao
authors.affiliation: Department of Orthopedics, Peking University Third Hospital, Beijing 100191, China.
authors.forename: Xin
authors.initials: X
authors.lastname: Chen
authors.affiliation: Department of Orthopedics, Peking University Third Hospital, Beijing 100191, China.
authors.forename: Yanbin
authors.initials: Y
authors.lastname: Zhao
mesh_terms: D005260:Female; D006801:Humans; D065406:Laminoplasty / Q000592:standards*; D008297:Male; D008875:Middle Aged; D012189:Retrospective Studies; D013118:Spinal Cord Diseases / Q000601:surgery*