RT Journal Article
SR Electronic
T1 Sleep disturbance and cardiovascular risk in adolescents
JF Canadian Medical Association Journal
JO CMAJ
FD Canadian Medical Association
SP E913
OP E920
DO 10.1503/cmaj.111589
VO 184
IS 17
A1 Indra Narang
A1 Cedric Manlhiot
A1 Jolie Davies-Shaw
A1 Don Gibson
A1 Nita Chahal
A1 Karen Stearne
A1 Amanda Fisher
A1 Stafford Dobbin
A1 Brian W. McCrindle
YR 2012
UL http://www.cmaj.ca/content/184/17/E913.abstract
AB Background: Evidence suggests that inadequate or disturbed sleep is associated with increased cardiovascular risk in adults. There are limited data on sleep quality and associated cardiovascular risk in children.Methods: We obtained data on adolescents from the 2009/10 cycle of the Healthy Heart Schools’ Program, a population-based cross-sectional study in the Niagara region of Ontario. Participants underwent measurements of cardiometabolic risk factors, including body mass index (BMI), lipid profile and blood pressure, and they completed questionnaires measuring sleeping habits and nutritional status. We assessed sleep disturbance using the sleep disturbance score derived from the Pittsburgh Sleep Quality Index. We explored associations between sleeping habits and cardiovascular risk factors.Results: Among 4104 adolescents (51% male), the mean hours of sleep per night (± standard deviation) were 7.9 ± 1.1 on weeknights and 9.4 ± 1.6 on weekends. In total, 19% of participants reported their sleep quality as fairly bad or very bad on weeknights and 10% reported it as fairly bad or very bad on weekends. In the multivariable regression models, a higher sleep disturbance score was associated with increased odds of being at high cardiovascular risk (highest v. lowest tertile odds ratio [OR] 1.43 [95% confidence interval (CI) 1.16–1.77], p < 0.001), increased odds of hypertension (highest v. lowest tertile OR 1.44 [95% CI 1.02–2.05], p = 0.05) and increased odds of elevated non-high density lipoprotein cholesterol (highest v. lowest tertile OR 1.28 [95% CI 1.00–1.64], p = 0.05). The mean duration of sleep was not associated with these outcomes.Interpretation: In healthy adolescents, sleep disturbance is associated with cardiovascular risk factor abnormalities. Intervention strategies to optimize sleep hygiene early in life may be important for the prevention of cardiovascular disease.