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Abstract: FR-PO1069

Relationship of Blood Pressure to Sleep in High School Students

Session Information

Category: Pediatric Nephrology

  • 1700 Pediatric Nephrology

Authors

  • Gupta, Neena R., UMass Memorial Children's Medical Center, Worcester, Massachusetts, United States
  • Gupta, Rakesh, PrimaCARE, Somerset, Massachusetts, United States
Background

Childhood hypertension is a risk factor for adult hypertension and target organ damage. Emerging data suggests a role of inadequate sleep in hypertension. In our previous study, newly diagnosed primary hypertensive children had less weekend catch up sleep than age and sex matched normotensives. The usual sleep pattern of adolescents shows less sleep on school days with catch up sleep on the weekends, but it is not known if blood pressure (BP) tracks the changes in sleep over the course of the week. The aim of this study is to compare the BP of high school students at the beginning of the week with that at the end of the week. We also studied the relationship of self-reported weekday and weekend sleep duration to the BP.

Methods

Students from a public high school (11 and 12th grade) were asked to participate. Interested students completed a questionnaire. BP, height and weight were measured on Monday and Thursday morning of the same week. Average of 3 consecutive BP was taken using automated Omron BP 786 monitor. Weekday and weekend total sleep time (WDTST and WETST) was estimated from the questionnaire responses for usual getting in and getting out of bed time. T-test and multivariate linear regression were used for analysis.

Results

Of the 32 students recruited, 24 were female. Systolic BP on Monday and Thursday was 114.8 + 16.5 and 110.9 + 13.1 mm Hg respectively. Diastolic BP on Monday and Thursday was 72.7 + 7.4 and 70.9 + 13.7 mm Hg respectively. BMI was 25.7 + 5.5 Kg/M2. WDTST was 418.6 + 80.1 and WETST was 566.9 + 132.3 minutes. Paired T-test showed no significant difference between SBP and DBP for Monday and Thursday. However, multiple regression analysis showed significant inverse relationship of SBP-Monday (adjusting for BMI) with WDTST (p= 0.016) and WETST (p=0.017). Similar results were seen for DBP-Monday (adjusting for BMI) with WDTST (p= 0.049) and WETST (p=0.038).

Conclusion

Our results show that shorter sleep time is associated with higher BP in high school students. Previous studies in children and adults have also shown higher BP in subjects with short sleep durations. Beneficial effect of sleep extension has also been observed in prior studies. In our subjects, weekend sleep duration was about 2.5 hours longer, but BP-Monday was not different from that on Thursday. Lack of information on Sunday night sleep time and a small sample size are main limitations.