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Table 1 Baseline characteristics of all study subjects and a comparison between the treatment and non-treatment groups

From: The relationship between hypertension and sleep duration: an analysis of the fifth Korea National Health and Nutrition Examination Survey (KNHANES V-3)

Variables Total subjects (n = 6,365) Treatment group * (n = 1,754) Non-Treatment group (n = 4,723) P value
Male sex (%) 2,099 (49.2) 767 (53.2) 1,999 (47.6) 0.051
Mean age (yr) 44.9 ± 0.3 57.5 ± 0.5 40.4 ± 0.3 <0.001
Obesity (%) 1,663 (31.7) 773 (47.5) 864 (21.1) <0.001
Past history (%)     
CVD 269 (3.4) 181 (8.4) 84 (1.6) <0.001
DM 649 (9.7) 477 (26.1) 136 (3.0) <0.001
CKD 40 (0.6) 16 (1.2) 24 (0.4) 0.006
SBP (mmHg) 117.0 ± 0.3 134.4 ± 0.6 111.0 ± 0.3 <0.001
DBP (mmHg) 75.5 ± 0.2 83.5 ± 0.5 72.8 ± 0.2 <0.001
Total cholesterol (mg/dL) 188.2 ± 0.7 193.0 ± 1.2 186.7 ± 0.9 <0.001
Triglyceride (mg/dL) 131.3 ± 2.1 170.3 ± 4.9 117.0 ± 2.0 <0.001
FPG (mg/dL) 97.1 ± 0.4 107.8 ± 1.0 93.0 ± 0.3 <0.001
Current smoking (%) 743 (20.6) 227 (18.5) 507 (21.2) 0.087
Physical activity (%) 791 (17.6) 235 (14.1) 734 (21.7) 0.001
Sleep duration (hours) 6.8 ± 0.29 6.7 ± 0.04 6.9 ± 0.03 <0.001
  1. Values are presented as means ± SD or frequencies (%). P-value for treatment group vs. non-treatment group.
  2. *Treatment group included participants taking antihypertensive medication.
  3. CVD included myocardial infarction, angina, and stroke.
  4. Physical activity, moderate exercise at least three times a week.
  5. CVD, cardiovascular disease; SBP, systolic blood pressure; DBP, diastolic blood pressure; FPG, fasting plasma glucose; DM, diabetes mellitus; CKD, chronic kidney disease.