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The Association Between Chronotype and Weight Change Among Medical Students: A Cross-Sectional Study
Link Between Sleep Timing Preference and Weight Change in Medical Students
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Abstract
Definite evening-type medical students gained an average of 0.88 kg compared to definite morning-type students.
- Among 1300 medical students, distribution included 14.08% definite morning, 12.38% moderate morning, 28.92% intermediate, 31.46% moderate evening, and 13.15% definite evening.
- Definite evening-type students reported worse sleep quality, shorter sleep duration, and higher consumption of late-night snacks.
- An increasing trend of weight change was observed in students with moderate morning to definite evening chronotypes.
- The odds of weight gain were higher for evening chronotype students, particularly those who had dinner at or after 6 PM, compared to morning-type students who dined earlier.
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Key numbers
0.88 kg
Weight Change Increase
Average weight change among definite evening students.
42.38%
Weight Gain Proportion
Percentage of medical students who reported weight gain.
2.43
Odds Ratio for Weight Gain
Odds ratio comparing evening students with late dinner to morning types.