Circadian Sleep Disorders Network - Advocating for people with misaligned body clocks
Printer-friendly page
ON THIS PAGE (links): Top
Email & Office
Our Mission
Our Status
What Are Circadian Rhythm Sleep Disorders?
Social Media

Media Kit

Handy information for reporters, journalists, etc

Our Email:
Our Office: 4619 Woodfield Rd, Bethesda, MD 20814

We're in the business of raising awareness about Circadian Rhythm Sleep Disorders, so we're eager to help reporters and others who are writing about these disorders and/or our organization.

Our Mission

Circadian Sleep Disorders Network is an independent nonprofit organization dedicated to improving the lives of people with chronic circadian rhythm disorders.

We aim to increase awareness within the medical community and among the general public, to provide emotional support and practical ideas for people living with these disorders, to inform patients and health care providers about treatment options, to encourage research into circadian rhythms, and to advocate for accommodations in education and employment for people with circadian rhythm sleep disorders.

Our Status

We are a non-profit corporation registered in the state of Maryland. We are recognized as a 501(c)(3) public charity by the U.S. Internal Revenue Service, so membership dues and contributions to us are tax-deductible in the U.S.

What Are Circadian Rhythm Sleep Disorders?


image of brochure cover Our brochure summarizes the disorders we struggle with.

The most basic information is in our Basic Fact Sheet.

Some of the most frequently asked questions are answered in our Q&A docs, DSPS Q&A and Non-24 Q&A.

Our website,, has lots more intormation about Circadian Rhythm Sleep Disorders.


infographic thumbnail Our infographic briefly describes Circadian Rhythm Sleep Disorders (CRSDs).

Please feel free to repost the graphic in its entirety to help raise awareness. You can also print it directly from your browser (we suggest making the browser window full screen - the image will resize). There are also JPG images in various proportions which you can download for printing directly on different sizes of paper:


day/night circle We have a series of 3-minute videos introducing Circadian Rhythm Sleep Disorders:

  1. What Are Circadian Rhythms?
  2. What Are Circadian Rhythm Sleep Disorders?
  3. What Is Delayed Sleep Phase Disorder?
  4. What Is Non-24-Hour Sleep-Wake Disorder?
  5. Urgent Need For Awaraeness And Accommodation
These are also collected into a playlist.

A more detailed introduction to Circadian Rhythm Sleep Disorders is presented in this video: Circadian Rhythm Sleep Disorders (50 minutes)


Studies suggest that 1 in 600 adults suffers from Delayed Sleep Phase Disorder1. That's half a million American adults! In addition, it's been estimated that as many as 10% of teens are affected2, another two million American teens. Most of the teens will grow out of it.

It is estimated that half of all totally blind people suffer from Non-24-Hour Sleep-Wake Disorder3: another 90,000 Americans. Non-24 also occurs in sighted individuals4, but the prevalence is unknown, and the disorder is almost certainly underdiagnosed.


Feel free to contact our , , or other members of our Board of Directors for further information or to schedule an interview.

CSD-N on Social Media

Our Facebook page
Our LinkedIn page
Our Twitter feed


These are our trademarks. Please use them only in connection with Circadian Sleep Disorders Network.

small logo yellow face with blue border

small black logo with transparent outside

small blue logo

A larger version:
logo yellow face with blue border

Click here for a very large logo, for resizing to your needs (appears on a separate page).


1 Schrader, H, et al, The prevalence of delayed and advanced sleep phase syndromes, J Sleep Res, Mar 1993,2(1):51-55
2 Saxvig, IW, et al, Prevalence and correlates of delayed sleep phase in high school students, Sleep Med, Feb 2012,13(2):193-9
3 Sack, RL, et al, Circadian rhythm abnormalities in totally blind people: incidence and clinical significance, J Clin Endocrinol Metab, Jul 1992,75(1):127-34
4 Hayakawa, T, et al, Clinical analyses of sighted patients with non-24-hour sleep-wake syndrome: a study of 57 consecutively diagnosed cases, Sleep, Aug 1, 2005,28(8):945-52
© 2023 Circadian Sleep Disorders Network
Last modified Dec 14, 2019
Problems: contact