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Caffeine intake and semen quality in a population of 2,554 young Danish men

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Authors:
  • Jensen, Tina Kold ;
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    Environmental Medicine, Department of Public Health, Faculty of Health Sciences, SDU
  • Swan, Shanna H ;
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    unknown
  • Skakkebaek, Niels E ;
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    unknown
  • Rasmussen, Sanne ;
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    Research Unit of General Practice, Department of Public Health, Faculty of Health Sciences, SDU
  • Jørgensen, Niels
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    unknown
DOI:
10.1093/aje/kwq007
Abstract:
The authors examined the association between semen quality and caffeine intake among 2,554 young Danish men recruited when they were examined to determine their fitness for military service in 2001-2005. The men delivered a semen sample and answered a questionnaire including information about caffeine intake from various sources, from which total caffeine intake was calculated. Moderate caffeine and cola intakes (101-800 mg/day and <or =14 0.5-L bottles of cola/week) compared with low intake (<or =100 mg/day, no cola intake) were not associated with semen quality. High cola (>14 0.5-L bottles/week) and/or caffeine (>800 mg/day) intake was associated with reduced sperm concentration and total sperm count, although only significant for cola. High-intake cola drinkers had an adjusted sperm concentration and total sperm count of 40 mill/mL (95% confidence interval (CI): 32, 51) and 121 mill (95% CI: 92, 160), respectively, compared with 56 mill/mL (95% CI: 50, 64) and 181 mill (95% CI: 156, 210) in non-cola-drinkers, which could not be attributed to the caffeine they consumed because it was
Type:
Journal article
Language:
English
Published in:
American Journal of Epidemiology, 2010, Vol 171, Issue 8, p. 883-91
Keywords:
Analysis of Variance; Caffeine; Chi-Square Distribution; Cross-Sectional Studies; Denmark; Drinking Behavior; Food Habits; Humans; Life Style; Male; Men; Military Personnel; Questionnaires; Regression Analysis; Semen; Semen Analysis; Sperm Count; Sperm Motility; Statistics, Nonparametric; Journal Article; Research Support, Non-U.S. Gov't
Main Research Area:
Medical science
Publication Status:
Published
Review type:
Peer Review
Submission year:
2010
Scientific Level:
Scientific
ID:
3749132

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