title: Predictive factors for in-stent restenosis after balloon-mounted stent placement for symptomatic intracranial atherosclerosis.
abstract: OBJECTIVE
  We sought to evaluate whether clinical, lesion-related and procedural factors may predict in-stent restenosis (ISR) after intracranial stenting.
  
  
  METHODS
  Sixty-one Chinese patients with 65 lesions treated with single bare metal balloon-mounted stent for symptomatic intracranial arterial stenosis underwent conventional angiographic follow-up after procedures between March 2004 and July 2009. Clinical, lesion-related and procedural factors were analysed for any predictive power for the ISR using univariate and multivariate analysis. ISR was defined as >50% stenosis within or at the edge of the stent or absolute luminal loss >20%.
  
  
  RESULTS
  ISR was found in 18 patients (18/61, 29.5%) with 20 lesions (20/65, 30.8%) at a median follow-up of 7 months (range, 5-30 months). Univariate analysis revealed that diabetes, Mori classification, lesion length and stent diameter were associated with ISR. In addition, diabetes (hazard ratio (HR), 2.661; 95% confidence interval (CI), 1.044-6.787; P=0.040) and lesion length (HR, 1.206; 95% CI, 1.023-1.421; P=0.026) were detected as two independent predictors for ISR by stepwise multivariate Cox regression analysis.
  
  
  CONCLUSIONS
  ISR after intracranial stenting with bare metal balloon-mounted stents in our series seems to be more frequent than those reported by the majority of the published case series. Diabetes and lesion length are associated with increased risk of ISR.
authors.affiliation: Department of Neurology, Jinling Hospital, Nanjing University School of Medicine, 305# East Zhongshan Road, Nanjing 210002, Jiangsu Province, People's Republic of China.
authors.forename: S G
authors.initials: SG
authors.lastname: Zhu
authors.forename: R L
authors.initials: RL
authors.lastname: Zhang
authors.forename: W H
authors.initials: WH
authors.lastname: Liu
authors.forename: Q
authors.initials: Q
authors.lastname: Yin
authors.forename: Z M
authors.initials: ZM
authors.lastname: Zhou
authors.forename: W S
authors.initials: WS
authors.lastname: Zhu
authors.forename: Y L
authors.initials: YL
authors.lastname: Zhu
authors.forename: G L
authors.initials: GL
authors.lastname: Xu
authors.forename: X F
authors.initials: XF
authors.lastname: Liu
mesh_terms: D000368:Aged; D000800:Angioplasty, Balloon / Q000295:instrumentation*; D002533:Cerebral Angiography; D005260:Female; D005500:Follow-Up Studies; D006801:Humans; D002537:Intracranial Arteriosclerosis / Q000000981:diagnostic imaging / Q000601:surgery*; D008297:Male; D008875:Middle Aged; D011237:Predictive Value of Tests; D016016:Proportional Hazards Models; D012008:Recurrence; D012042:Registries; D012189:Retrospective Studies; D018709:Statistics, Nonparametric; D015607:Stents; D016019:Survival Analysis