title: Association of sleep duration with arterial blood pressure profile of gujarati Indian adolescents.
abstract: OBJECTIVE
  Recently, National Health and Nutritional Examination Survey-1 data analysis found short sleep duration as a risk factor for hypertension in the U.S. population. However, since ethnic differences exist in the aetiopathogenesis of diseases, the current study was undertaken to study the effect of sleep duration on the blood pressure profile of Gujarati Indian adolescents.
  
  
  METHODS
  A cross-sectional study was conducted on 489 Gujarati Indian adolescents of age group 16-19 years studying in school and colleges in the local population. The participants were assessed for their sleep duration, physical activity status, body composition, blood pressure profile and cardiovascular reactivity. The sleep duration was reported by the subjects as the number of hours they slept on most of the nights in a week over the last one year. The observations of the study were then analyzed after grouping them into: 1) Adequate Sleep Duration at Night, ASDN (>/=7 hrs) and 2) Inadequate Sleep Duration at Night, ISDN (<7 hrs) groups. Student's unpaired t-test was used to study if any significant difference (P< 0.05) existed between the groups.
  
  
  RESULTS
  No significant difference was found in Systolic blood pressure, Diastolic blood pressure, Pulse pressure and Mean arterial pressure between the ASDN group and the ISDN group. Physical activity status also did not differ between the two groups. However, adolescents of ISDN group showed a significantly higher level of adiposity and cardiovascular reactivity as compared to adolescents of ASDN group.
  
  
  CONCLUSIONS
  Although short sleep duration is associated with a higher level of adiposity and cardiovascular reactivity in Gujarati Indian adolescents, it does not affect the resting blood pressure profile of these adolescents. However, longitudinal studies would be required to observe if the changes in adiposity and cardiovascular reactivity affect these adolescents in later life.
authors.affiliation: Department of Physiology, Pramukhswami Medical College, Karamsad-388325, Gujarat, India.
authors.forename: Wasim A
authors.initials: WA
authors.lastname: Shaikh
authors.forename: Minal
authors.initials: M
authors.lastname: Patel
authors.forename: Sk
authors.initials: S
authors.lastname: Singh