Association between Sleep Duration and Measurable Cardiometabolic Risk Factors in Healthy Korean Women: The Fourth and Fifth Korean National Health and Nutrition Examination Surveys (KNHANES IV and V)
Table 1
General characteristics of participants according to sleep duration.
Sleep duration (hours a day)
5
6
7
8
≥9
Total
value
%)
1,108 (13.0)
2,048 (24.1)
2,597 (30.5)
2,082 (24.5)
670 (7.9)
8505 (100)
Mean age (years)
51.3 14.6
43.8 12.8
42.5 12.7
41.1 12.6
38.8 14.3
43.3 13.5
0.01
Education
0.01
college
181 (16.3)
631 (30.8)
887 (34.2)
734 (35.3)
198 (29.6)
2631 (30.9)
Middle/high school
486 (43.9)
1022 (49.9)
1285 (49.5)
1027 (49.3)
339 (50.6)
4159 (48.9)
elementary school
441 (39.8)
395 (19.3)
425 (16.4)
321 (15.4)
133 (19.9)
1715 (20.2)
Monthly income (dollars)
0.01
≥3,010
296 (26.7)
878 (42.9)
1107 (42.6)
873 (41.9)
241 (36.0)
3395 (40.0)
1,010–3,000
457 (41.3)
843 (41.2)
1087 (41.9)
903 (43.4)
303 (45.2)
2866 (42.6)
≤1,000
355 (32.0)
327 (16.0)
403 (15.5)
306 (14.7)
126 (18.8)
1517 (17.8)
Smoking
0.01
Nonsmoker
978 (88.3)
1883 (91.9)
2375 (91.5)
1872 (89.9)
562 (83.9)
7670 (90.2)
Past-smoker
44 (4.0)
67 (3.3)
106 (4.1)
95 (4.6)
48 (7.2)
360 (4.2)
Current smoker
86 (7.8)
98 (4.8)
116 (4.5)
115 (5.5)
60 (9.0)
475 (5.6)
High risk drinking
0.01
Never
449 (50.2)
607 (29.6)
734 (28.3)
570 (27.4)
203 (30.3)
5131 (60.3)
≤once a month
347 (31.3)
746 (36.4)
957 (36.9)
765 (36.7)
209 (31.2)
2600 (30.6)
≥once a week
312 (28.2)
695 (33.9)
906 (34.9)
747 (35.9)
258 (38.5)
774 (9.1)
Physical activity (METs/week)
3359.8 5467.4
2748.7 4030.1
2600.5 4058.9
2567.3 4042.7
2234.9 3898.6
2695.5 4250.1
0.01
Intense physical activity (METs/week)
1305.7 4132.6
838.6 2274.0
827.0 2593.0
814.1 2479.1
501.1 1577.7
861.8 2688.3
0.01
BMI (kg/m2)
23.5 3.3
23.0 3.3
22.8 3.2
22.7 3.4
22.4 3.6
22.9 3.3
0.01
24 h recall-total calories (kcal)
1588.3 635.9
1653.5 662.6
1678.8 580.2
1701.6 636.1
1744.4 669.8
1672.2 629.9
0.01
Metabolic syndrome
0.01
Yes
240 (21.7)
308 (15.0)
396 (15.3)
288 (13.8)
106 (15.8)
1338 (15.7)
No
868 (78.3)
1740 (85.0)
2201 (84.8)
1794 (86.2)
564 (84.2)
7167 (84.3)
HDL cholesterol (mg/dl)
50.9 11.1
51.8 10.8
51.2 10.5
51.1 10.8
51.0 10.8
51.3. 10.7
0.17
Triglycerides (mg/dl)
111.7 69.0
101.0 65.7
100.0 69.5
100.0 65.8
103.9 66.6
102.1 67.5
0.02
Waist circumference (cm)
79.1 9.4
77.3 9.3
76.4 8.9
76.4 9.3
75.7 9.9
76.9 9.3
0.01
Fasting glucose (mg/dl)
92.6 15.0
91.5 13.3
91.1 11.2
91.6 12.6
90.8 11.2
91.5 12.6
0.01
SBP (mmHg)
115.3 17.2
110.3 14.7
109.7 15.5
109.3 14.6
108.7 14.7
110.4 15.4
0.01
DBP (mmHg)
73.7 10.0
72.0 9.4
71.4 9.9
71.2 9.5
70.6 9.4
71.7 9.7
0.02
METs, metabolic equivalent; SBP, systolic blood pressure; DBP, diastolic blood pressure; HDL, high density lipoprotein; BMI, body mass index; data are mean + SD or number and percentages. value is calculated from analysis of variance for continuous variables and chi-square test for categorical variables, respectively.
