title: [Prevalence of asymptomatic intracranial artery stenosis in middle-aged and elderly population in the community of Foshan city, Guangdong province: a cross-sectional study].
abstract: OBJECTIVE
  To investigate the prevalence and risk factors of asymptomatic intracranial artery stenosis in middle-aged and elderly population in the community of Foshan city, Guangdong province.
  
  
  METHODS
  Subjects from residential communities were chosen through Cluster sampling method. Physical data and history were collected. Serum fasting glucose, total cholesterol and triglycerides concentrations were tested with venous blood samples. Intracranial artery stenosis was diagnosed by transcranial Doppler (TCD). Data was analyzed by the software SPSS 18.0.
  
  
  RESULTS
  1405 subjects met the inclusive criteria, among which 163 (11.6%) were found one (7.4%) or more (4.2%) stenotic arteries, and the standardized rate was 10.3%. 9.89% of the SICA, and 3.05%, 2.29%, 1.59%, 1.38%, 0.89% of basilar artery, middle cerebral artery, anterior cerebral artery, vertebral artery, posterior cerebral artery were found stenotic respectively. Data from the age-stratified analysis showed that the prevalence in these above 70 (27.8%) was significantly higher than that under age 70 (7.5%) (P = 0.000). Single factor and logistic regression analysis demonstrated the history of diabetes mellitus and elevated systolic pressure present were significantly different between stenotic group and the non-stenotic group (P = 0.000, P = 0.000), which were the independent risk factors of asymptomatic stenosis of intracranial arteries (OR = 2.362, 95%CI: 1.194 - 4.674;OR = 1.024, 95%CI: 1.016 - 1.031).
  
  
  CONCLUSIONS
  Comparatively high prevalence of asymptomatic intracranial artery stenosis in middle-aged and aged community population was found in the Southern part of China, especially among the age group above 70. History of diabetes and elevated systolic pressure seemed to be the independent risk factors of asymptomatic stenosis of intracranial arteries.
authors.affiliation: Department of Neurology, the First Affiliated Hospital, Sun Yat-Sen University, Guangzhou 510080, China.
authors.forename: Li-Li
authors.initials: LL
authors.lastname: Su
authors.forename: Hai-Wei
authors.initials: HW
authors.lastname: Huang
authors.forename: Shuang-Quan
authors.initials: SQ
authors.lastname: Tan
authors.forename: Xiao-Hong
authors.initials: XH
authors.lastname: Wu
authors.forename: Gui-Juan
authors.initials: GJ
authors.lastname: Zhou
mesh_terms: D000328:Adult; D000368:Aged; D000369:Aged, 80 and over; D002343:Carotid Artery, Internal; D016893:Carotid Stenosis / Q000453:epidemiology*; D002681:China / Q000453:epidemiology; D003430:Cross-Sectional Studies; D005260:Female; D006801:Humans; D008297:Male; D008875:Middle Aged; D015995:Prevalence; D012307:Risk Factors