title: [The relationship between salt consumption and blood pressure among residents in Shandong province, China].
abstract: OBJECTIVE
  To study the relationship between salt consumption and blood pressure among residents in Shandong province, and to provide basic information for guiding people to prevent hypertension by reducing salt intake.
  
  
  METHODS
  Using multi-stage stratified cluster random sampling method, 2 184 residents aged 18 to 69 were selected as the research subjects, which were extracted randomly from 20 counties in Shandong province in June, 2011. The blood pressure of the subjects were measured and weighted. Based on 72 h dietary recalls and weighing measurement, and according to the distribution of salt intake, the grouping cut-off points were 10, 14 and 18 g. The difference of subjects with different characteristics and systolic blood pressure, diastolic blood pressure and prevalence of hypertension by grouping salt intake and other characteristics were analyzed, and the relationship between salt intake and prevalence of hypertension were analyzed.
  
  
  RESULTS
  The total of 2 133 residents were involved finally, the completion rate was 97.7%. After the complex weighted, the systolic and diastolic blood pressure's means (95%CI value) of the subjects were 121.0 (119.5-122.5) mmHg (1 mmHg = 0.133 kPa) and 78.5(77.4-79.6) mmHg respectively, which were all elevated with increasing of salt consumption. The blood pressure of the subjects with salt intake <10 g was the lowest, which were 119.6 (116.9-122.4) mmHg and 77.5(76.2-78.7) mmHg respectively. The blood pressure of the subjects with salt intake ≥ 18 g was the highest, which were 122.3(120.1-124.5) mmHg and 79.6(78.2-80.9) mmHg respectively. The analysis results showed that, among residents with normal waistline, the prevalence of hypertension of people with salt intake ≥ 18 g was 1.70(95%CI:1.04-2.76) times compared to that of people who consumed less than 10 g salt per day.
  
  
  CONCLUSIONS
  The hypertension prevalence of Shandong province is quite high, and there is a relationship between salt consumption and blood pressure.
authors.affiliation: Department of Noncommunicable Disease Control and Prevention, Shandong Center for Disease Control and Prevention, Jinan 250014, China.
authors.forename: Xiaolei
authors.initials: X
authors.lastname: Guo
authors.forename: Jixiang
authors.initials: J
authors.lastname: Ma
authors.forename: Liuxia
authors.initials: L
authors.lastname: Yan
authors.forename: Zhenqiang
authors.initials: Z
authors.lastname: Bi
authors.forename: Xiaofei
authors.initials: X
authors.lastname: Zhang
authors.forename: Xi
authors.initials: X
authors.lastname: Chen
authors.forename: Jiyu
authors.initials: J
authors.lastname: Zhang
authors.forename: Xiaoning
authors.initials: X
authors.lastname: Cai
authors.forename: Zilomg
authors.initials: Z
authors.lastname: Lu
authors.affiliation: Email: aqxuepi@163.com.
authors.forename: Aiqiang
authors.initials: A
authors.lastname: Xu
mesh_terms: D000293:Adolescent; D000328:Adult; D000368:Aged; D001794:Blood Pressure / Q000502:physiology*; D002681:China / Q000453:epidemiology; D003430:Cross-Sectional Studies; D005260:Female; D006801:Humans; D006973:Hypertension / Q000453:epidemiology; D008297:Male; D008875:Middle Aged; D018571:Sentinel Surveillance; D017673:Sodium Chloride, Dietary; D055815:Young Adult
chemical_list: D017673:Sodium Chloride, Dietary