Objectives The purposes of this study were to (1) examine the multi-year prevalence of highly caffeinated beverage (HCB) consumption, (2) identify sex differences in the prevalence, and (3) investigate relationships between HCB consumption and behavioral characteristics in a nationally representative sample of Korean adolescents.
Methods Data from the Korea Youth Risk Behavior Web-based Survey (2014–2017) were analyzed.
Results HCB consumption was higher in 2017 than 2014 (23.9% vs. 12.0%), and higher among boys than girls (17.2% vs. 13.1%). HCB drinkers were more likely to (1) be boys, (2) be overweight or obese, (3) use alcohol and tobacco, (4) consume soda at least once per week, (5) consume sweetened beverages at least once per week, (6) have seriously considered suicide during the past 12 months, and (7) have attempted suicide during the past 12 months (p<0.05 for all).
Conclusion Effective programs to curb HCB consumption among Korean adolescents need to be established.
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<sec>
<title>Objectives</title>
<p>We aimed to examine health-related nutritional knowledge and dietary behavior related to caffeine intake among high school students (<italic>n</italic> = 310) in the Yongin region of Korea.</p></sec>
<sec>
<title>Methods</title>
<p>Data were collected using a face-to-face survey, and analyzed using chi-square test, <italic>t</italic>- test, and logistic regression analysis.</p></sec>
<sec>
<title>Results</title>
<p>The level of caffeine intake in respondents was divided into low (< 30 mg/d; <italic>n</italic> = 208) and high caffeine intake groups (> 30 mg/d; <italic>n</italic> = 102). Total nutritional knowledge related to bone disease was higher in the low intake group (score 2.75) than the high intake group (score 2.39; <italic>p</italic> < 0.05). The high intake group had lower scores for nutritional knowledge (score 0.70; <italic>p</italic> < 0.05) related to how caffeinated beverages affect sleep and for dietary behavior (score 3.25; <italic>p</italic> < 0.001), based on “I avoid caffeinated foods before sleep,” than the low intake group (nutritional knowledge score, 0.80; dietary behavior score, 3.76).</p></sec>
<sec>
<title>Conclusion</title>
<p>In the overall analysis, the low caffeine intake group had better nutritional knowledge related to bone and sleep health, and healthier dietary behavior related to sleep health compared with the high intake group.</p></sec>
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