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. Author manuscript; available in PMC: 2013 Aug 28.
Published in final edited form as: Sleep Med. 2011 Jul 20;12(7):693–699. doi: 10.1016/j.sleep.2010.12.019

Table 3.

Logistic regression analysis# on HBP in relation to sleep duration by gender in rural Chinese adults aged 18–65 years.

TST Males Females
ORs 95%CI P-value ORs 95%CI P-value

HBP
<7H 1.4 0.9,2.2 0.127 3.0 1.4,6.6 0.005
7–9H - -
≥9H 1.5 1.1,2.2 0.021 1.8 1.0,3.2 0.063

Adjustment for Adiposity
--BMI
<7H 1.4 0.9,2.2 0.114 2.4 1.1,5.0 0.027
7–9H - -
≥9H 1.5 1.1,2.2 0.025 1.8 0.9,3.3 0.080
--%BF
<7H 1.4 0.9,2.2 0.107 2.5 1.2,5.2 0.019
7–9H - -
≥9H 1.6 1.1,2.3 0.019 1.8 1.0,3.4 0.057
Adjustment for sleep related disorder
--sleep quality from PSQI
<7H 1.4 0.9,2.3 0.133 3.3 1.5,7.3 0.003
7–9H - -
≥9H 1.5 1.1,2.2 0.022 1.7 0.9,3.1 0.075
--risk of sleep apnea from Berlin questionnaire
<7H 1.5 0.9,2.3 0.101 3.3 1.5,7.2 0.003
7–9H - -
≥9H 1.6 1.1,2.3 0.020 1.8 1.0,3.5 0.050
--sleepiness from Epworth sleepiness scale
<7H 1.4 0.9,2.1 0.126 3.0 1.4,6.6 0.005
7–9H - -
≥9H 1.6 1.1,2.3 0.017 1.8 1.0,3.2 0.064
#

Adjusted by age, smoking (active+passive), alcohol intake, physical activity, occupation, menopause in females.; HBP: High blood pressure-defined as SBP≥130 and/or DBP≥85 mmHg or diagnosed hypertension. TST: Total sleep time; BMI: body mass index; %BF: percent body fat; ORs: odd ratio; CI: confidence interval; A two-sided P<0.025 was used to guard against type I error using Bonferroni correction: 0.05/2 tests