Enter your Email address:
Wolters Kluwer Health may email you for journal alerts and information, but is committed
to maintaining your privacy and will not share your personal information without
You currently have no recent searches
Chatzi, Leda; Micheli, Katerina; Kogevinas, Manolis
Department of Social Medicine University of Crete Heraklion, Greece email@example.com (Chatzi, Micheli)
Centre for Research in Environmental Epidemiology (CREAL) Barcelona, Spain National School of Public Health Athens, Greece (Kogevinas)
We read with great interest the recent letter by Zouein and Bourjeily1 commenting on our article on “Sleep patterns in late pregnancy and risk of preterm birth and fetal growth restriction.”2 The main point in our discussion was that there exists little and controversial epidemiologic evidence on sleep behaviors during pregnancy and their association with birth outcomes. Zouein and Bourjeily agree with us on this. They mention that we erroneously quoted the study by Bourjeily et al3 as having similar findings. We stated that the risk ratio of 2 that we found was similar to the odds ratio of 1.9 reported by Bourjeily et al. Although that estimate was not statistically significant, this seems a reasonable statement to us.
Zouein and Bourjeily1 are right in stressing that the prevalence of severe snoring in our study population (14% occasionally snorers and 4% severe snores) is lower than in other studies. We are aware of the issues, and we should have discussed it in our paper. The prevalence of obesity was twice as high in the study by Bourjeily et al (22% women had a prepregnancy BMI ≥30) compared with our cohort (11% women had a prepregnancy BMI ≥30; prepregnancy mean BMI = 24.2 [SD = 4.8]), and this could partially explain the observed differences. Other sociocultural, nutritional (for example the high adherence to Mediterranean diet),4 and environmental differences in Crete could also contribute to the low prevalence of severe snoring. Future longitudinal studies are needed to confirm these findings, to better understand the complex underlying processes, and to develop preventive-care strategies based on sleep-quality improvement during pregnancy.
Department of Social Medicine
University of Crete
Centre for Research in Environmental Epidemiology (CREAL)
National School of Public Health
© 2012 Lippincott Williams & Wilkins, Inc.
Colleague's E-mail is Invalid
Your Name: (optional)
Separate multiple e-mails with a (;).
Thought you might appreciate this item(s) I saw at Epidemiology.
Send a copy to your email
Your message has been successfully sent to your colleague.
Some error has occurred while processing your request. Please try after some time.
An Existing Folder
A New Folder
The item(s) has been successfully added to "".
Login with your LWW Journals username and password.
Username or Email:
Enter and submit the email address you registered with. An email with instructions to reset your password will be sent to that address.
Link to reset your password has been sent to specified email address.
What does "Remember me" mean?
By checking this box, you'll stay logged in until you logout. You'll get easier access to your articles, collections,
media, and all your other content, even if you close your browser or shut down your
To protect your most sensitive data and activities (like changing your password),
we'll ask you to re-enter your password when you access these services.
What if I'm on a computer that I share with others?
If you're using a public computer or you share this computer with others, we recommend
that you uncheck the "Remember me" box.
Save my selection