Abstract
Purpose
The purpose of this study is to identify the dietary habits of Korean adolescents and to investigate their effects on sleep duration.
Methods
This study is a secondary analysis drawn from the 2016 Korean Youth Risk Behavior Web-Based Survey (N=65,528). ANCOVA was used to determine the relationship between dietary habits and sleep duration. Ordinal logistic regression was used to find out the effects of dietary habits on sleep duration adjusted for general characteristics and behavioral characteristics.
Results
The group that consumed no breakfast (AOR=0.89, p<.001) had less sufficient sleep duration than those who had breakfast 7 times per week. The group that had drunk no milk (AOR=0.88, p<.001) had less sufficient sleep duration than those who enjoyed it 5 times per week. On the contrary, the groups that had no soda drinks (AOR=1.18, p=.015), caffeine drinks (AOR=1.77, p<.001), and sweet drinks (AOR=1.25, p<.001) were more likely to have sufficient sleep duration than the groups that consumed those beverages 5 times per week.
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Table 1.
General Characteristics and Behavioral Characteristics (N=63,741)
Table 2.
Dietary Habits and Sleep Duration (N=63,741)
Variables | Categories | n (%) or M±SD |
---|---|---|
Breakfast† | None | 9,783 (14.9) |
1~2 | 8,749 (13.4) | |
3~6 | 21,912 (33.4) | |
7 | 25,084 (38.3) | |
Fruits‡ | None | 5,729 (8.7) |
1~2 | 18,958 (28.9) | |
3~6 | 25,846 (39.4) | |
≥7 | 14,995 (22.9) | |
Fast food‡ | None | 15,241 (23.3) |
1~2 | 39,553 (60.4) | |
3~6 | 9,974 (15.2) | |
≥7 | 760 (1.2) | |
Vegetables‡ | None | 2,452 (3.7) |
1~2 | 10,139 (15.5) | |
3~6 | 25,105 (38.3) | |
≥7 | 27,832 (42.5) | |
Milk‡ | None | 10,008 (15.7) |
≤4 | 26,836 (42.1) | |
≥5 | 26,897 (42.2) | |
Soda drinks‡ | None | 15,493 (24.3) |
≤4 | 43,101 (67.6) | |
≥5 | 5,147 (8.1) | |
Caffeine drinks‡ | None | 55,185 (86.6) |
≤4 | 7,602 (11.9) | |
≥5 | 954 (1.5) | |
Sweet drinks‡ | None | 9,885 (15.5) |
≤4 | 44,467 (69.8) | |
≥5 | 9,389 (14.7) | |
Sleep duration§ | Sufficient (≥8) | 6.37±1.95 |
Insufficient (<8) | 13,152 (20.1) | |
52,376 (79.9) |
Table 3.
Association between Dietary Habits and Sleep Duration (N=63,741)
Variables | Categories |
Sleep duration |
F§ | p |
---|---|---|---|---|
M±SD | ||||
Breakfast† | Nonea | 6.35±1.97 | 9.57 | <.001 |
1~2b | 6.31±1.94 | a, b, c<d | ||
3~6c | 6.34±1.89 | |||
7d | 6.49±1.94 | |||
Fruits‡ | Nonea | 6.32±1.97 | 6.70 | <.001 |
1~2b | 6.35±1.90 | b, c>d | ||
3~6c | 6.42±1.91 | |||
≥7d | 6.43±1.99 | |||
Fast food‡ | Nonea | 6.41±1.99 | 21.59 | <.001 |
1~2b | 6.42±1.90 | a, b>c>d | ||
3~6c | 6.28±1.94 | |||
≥7d | 5.91±2.23 | |||
Vegetables‡ | Nonea | 6.24±1.96 | 6.21 | <.001 |
1~2b | 6.35±1.91 | a<c | ||
3~6c | 6.41±1.89 | |||
Milk‡ | ≥7d | 6.41±1.97 | 1.77 | .171 |
Nonea | 6.23±1.85 | |||
1~2b | 6.36±1.86 | |||
3~6c | 6.49±2.02 | |||
Soda drinks‡ | Nonea | 6.39±1.93 | 20.17 | <.001 |
≤4b | 6.41±1.92 | a, b>c | ||
≥5c | 6.25±2.03 | |||
Caffeine drinks‡ | Nonea | 6.46±1.91 | 229.61 | <.001 |
≤4b | 6.07±1.97 | a>b>c | ||
≥5c | 5.31±2.12 | |||
Sweet drinks‡ | Nonea | 6.48±1.99 | 29.63 | <.001 |
≤4b | 6.41±1.92 | a, b>c | ||
≥5c | 6.23±1.93 |
Table 4.
Predictors of Sufficient Sleep Duration among Dietary Habits (N=63,741)
Variables | Categories |
Model 1 |
Model 2 |
Model 3 |
||||||
---|---|---|---|---|---|---|---|---|---|---|
OR | 95% CI | p | AOR | 95% CI | p | AOR | 95% CI | p | ||
Breakfast† | None | 0.92 | 0.87~0.98 | .004 | 0.89 | 0.94~0.95 | .001 | 0.89 | 0.83~0.95 | <.001 |
1~2 | 0.84 | 0.78~0.89 | <.001 | 0.84 | 0.78~0.90 | <.001 | 0.83 | 0.77~0.89 | <.001 | |
3~6 | 0.80 | 0.75~0.84 | <.001 | 0.84 | 0.80~0.88 | <.001 | 0.84 | 0.79~0.88 | <.001 | |
7 | 1 | 1 | 1 | |||||||
Fruits‡ | None | 0.91 | 0.84~0.98 | .015 | 1.05 | 0.96~1.15 | .267 | 1.03 | 0.94~1.13 | .507 |
1~2 | 0.85 | 0.80~0.89 | <.001 | 1.04 | 0.97~1.10 | .272 | 1.03 | 0.97~1.10 | .307 | |
3~6 | 0.93 | 0.88~0.98 | .005 | 1.03 | 0.98~1.09 | .249 | 1.03 | 0.97~1.09 | .299 | |
≥7 | 1 | 1 | 1 | |||||||
Fast food‡ | None | 1.26 | 1.02~1.55 | .033 | 1.02 | 0.81~1.28 | .878 | 1.01 | 0.80~1.28 | .909 |
1~2 | 1.14 | 0.93~1.40 | .213 | 1.00 | 0.80~1.26 | .973 | 1.01 | 0.80~1.27 | .949 | |
3~6 | 1.05 | 0.85~1.30 | .646 | 0.97 | 0.77~1.21 | .761 | 0.98 | 0.77~1.23 | .834 | |
≥7 | 1 | 1 | 1 | |||||||
Vegetables‡ | None | 0.93 | 0.83~1.34 | .196 | 0.98 | 0.87~1.10 | .691 | 0.99 | 0.88~1.12 | .902 |
1~2 | 0.99 | 0.94~1.06 | .930 | 0.99 | 0.94~1.07 | .952 | 1.01 | 0.94~1.07 | .885 | |
3~6 | 1.01 | 0.95~1.05 | .742 | 1.05 | 1.00~1.10 | .048 | 1.05 | 0.99~1.10 | .077 | |
≥7 | 1 | 1 | 1 | |||||||
Milk‡ | None | 0.60 | 0.56~0.63 | <.001 | 0.84 | 0.79~0.90 | <.001 | 0.88 | 0.82~0.94 | <.001 |
≤4 | 0.71 | 0.68~0.74 | <.001 | 0.88 | 0.83~0.91 | <.001 | 0.89 | 0.85~0.94 | <.001 | |
≥5 | 1 | 1 | 1 | |||||||
Soda drinks‡ | None | 1.25 | 1.14~1.36 | .001 | 1.24 | 1.08~1.40 | .008 | 1.18 | 1.06~1.30 | .015 |
≤4 | 1.18 | 1.06~1.30 | .004 | 1.16 | 1.00~1.30 | .010 | 1.10 | 1.02~1.62 | .021 | |
≥5 | 1 | 1 | 1 | |||||||
Caffeine drinks‡ | None | 1.41 | 1.31~1.52 | <.001 | 1.76 | 1.41~2.19 | <.001 | 1.77 | 1.41~2.22 | <.001 |
≤4 | 1.21 | 1.13~1.29 | <.001 | 1.28 | 1.02~1.61 | .033 | 1.29 | 1.02~1.62 | .035 | |
≥5 | 1 | 1 | 1 | |||||||
Sweet drinks‡ | None | 1.43 | 1.33~1.54 | <.001 | 1.29 | 1.19~1.40 | <.001 | 1.25 | 1.15~1.37 | <.001 |
≤4 | 1.22 | 1.14~1.29 | <.001 | 1.13 | 1.06~1.21 | <.001 | 1.12 | 1.04~1.20 | .002 | |
≥5 | 1 | 1 | 1 | |||||||
R2=.02 (Cox&Snell), | R2=.12 (Cox&Snell), | R2=.13 (Cox&Snell), | ||||||||
x2=987.57, p<.001 | x2=8,350.99, p<.001 | x2=8,683.38, p<.001 |