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Reducing caffeine intake has no effect on birth weight or length of pregnancy
January 29, 2007Effect of reducing caffeine intake on birth weight and length of gestation: Randomized controlled trial BMJ Online First
There is no evidence that moderate levels of caffeine consumption during pregnancy lead to a greater risk of premature births and underweight babies despite warnings from some public health officials, finds a new study on bmj.com today.
Previous research has puzzled public health authorities. While some studies have suggested that a high caffeine intake can lead to lower average birth weights of as much as 100 - 200g and an increased chance of preterm babies, others have found no connection between caffeine and problems with foetal development.
Danish researchers sought to clarify this confusing picture by monitoring the pregnancies of 1,207 healthy women who drank more than three cups of coffee a day - a high caffeine intake-and who were less than twenty weeks pregnant.
This large group was divided randomly into two equal groups who received either caffeinated or decaffeinated coffee. Each participant was regularly interviewed to monitor their caffeine intake, including contributions from other drinks, such as tea and cola. Information was collected on their length of gestation and baby's weight at the conclusion of their pregnancy.
Importantly, the researchers took a number of precautions to ensure that the study's findings were not corrupted by outside factors. Those taking part were not told what type of coffee they were drinking. During the analysis phase, adjustments were made for other factors, such as age, pre-pregnancy weight and the smoking status of the participants.
The final results showed that there was no real difference in either the length of pregnancy or birth weight between the two groups.
Women drinking caffeinated coffee recorded a mean (average) birth weight of 3539g while those consuming decaffeinated coffee had a mean birth weight of 3519g, a difference of just 20g that was not statistically meaningful.
There were no other important differences between pregnancies in the two groups. In the caffeinated group, 4.2% of infants were born prematurely and 4.5% were small for their gestational age, compared to 5.2% premature births and 4.7% underweight babies in the decaffeinated groups.
The report's authors conclude that decreasing caffeine intake during the later stages of pregnancy has no overall effect on birth weight and length of pregnancy.
BMJ-British Medical Journal
Danish researchers sought to clarify this confusing picture by monitoring the pregnancies of 1,207 healthy women who drank more than three cups of coffee a day - a high caffeine intake-and who were less than twenty weeks pregnant.
This large group was divided randomly into two equal groups who received either caffeinated or decaffeinated coffee. Each participant was regularly interviewed to monitor their caffeine intake, including contributions from other drinks, such as tea and cola. Information was collected on their length of gestation and baby's weight at the conclusion of their pregnancy.
Importantly, the researchers took a number of precautions to ensure that the study's findings were not corrupted by outside factors. Those taking part were not told what type of coffee they were drinking. During the analysis phase, adjustments were made for other factors, such as age, pre-pregnancy weight and the smoking status of the participants.
The final results showed that there was no real difference in either the length of pregnancy or birth weight between the two groups.
Women drinking caffeinated coffee recorded a mean (average) birth weight of 3539g while those consuming decaffeinated coffee had a mean birth weight of 3519g, a difference of just 20g that was not statistically meaningful.
There were no other important differences between pregnancies in the two groups. In the caffeinated group, 4.2% of infants were born prematurely and 4.5% were small for their gestational age, compared to 5.2% premature births and 4.7% underweight babies in the decaffeinated groups.
The report's authors conclude that decreasing caffeine intake during the later stages of pregnancy has no overall effect on birth weight and length of pregnancy.
BMJ-British Medical Journal
Caffeine Intake Current Events and Caffeine Intake News RSSCaffeine reverses memory impairment in Alzheimer's mice
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Adolescent obesity linked to reduced sleep caused by technology use and caffeine
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A little java makes it easier to jive, researcher says
Stopping to smell the coffee - and enjoy a cup of it - before your morning workout might do more than just get your juices flowing. It might keep you going for reasons you haven't even considered.
Consuming small amounts of caffeine when pregnant may affect the growth of an unborn child
Consuming caffeine at any time during pregnancy is associated with an increased risk of fetal growth restriction (low birth weight).
Java gives caffeine-naive a boost, too
New research from the University of Alberta in Edmonton, Canada, shows that-for women-the caffeine advantage is indeed everything it's cracked up to be. Females who don't drink coffee can get just as much of a caffeine boost as those who sip it regularly, according to a study in the latest edition of Nutrition Research.
Soy foods are associated with lower sperm concentrations
Men who eat an average of half a serving of soy food a day have lower concentrations of sperm than men who do not eat soy foods, according to research published online in Europe's leading reproductive medicine journal, Human Reproduction, today (Thursday 24 July). The association was particularly marked in men who were overweight or obese, the study found.
A coffee with your doughnut could protect against Alzheimer's disease
A daily dose of caffeine blocks the disruptive effects of high cholesterol that scientists have linked to Alzheimer's disease. A study in the open access publication, Journal of Neuroinflammation revealed that caffeine equivalent to just one cup of coffee a day could protect the blood-brain barrier (BBB) from damage that occurred with a high-fat diet.
New Kaiser Permanente study fortifies caffeine's link to miscarriage
High doses of daily caffeine during pregnancy - whether from coffee, tea, caffeinated soda or hot chocolate -- cause an increased risk of miscarriage, according a new study by the Kaiser Permanente Division of Research.
Mixing large doses of both acetaminophen painkiller and caffeine may increase risk of liver damage
Consuming large amounts of caffeine while taking acetaminophen, one of the most widely used painkillers in the United States, could potentially cause liver damage, according to a preliminary laboratory study reported in the Oct. 15 print issue of ACS' Chemical Research in Toxicology, a monthly journal.
Caffeine may prevent heart disease death in elderly
Habitual intake of caffeinated beverages provides protection against heart disease mortality in the elderly, say researchers at SUNY Downstate Medical Center and Brooklyn College.
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