Any researchers who have tried to combine multiple datasets or validate findings in another dataset know how heterogeneity across datasets can make the process difficult or even impossible. At NSRR, we are working to address these challenges by standardizing and harmonizing important sleep measures and non-sleep covariates retrospectively. Standardization aims to reach uniformity in metadata across datasets, be it channel labels, annotations, variable definitions, sleep terminology, etc. Keep reading
The NSRR is constantly developing new tools to improve its user experience. One of the newly developed applications, as inspired by the Dementias Platform, is the Cohort Matrix. The NSRR cohort matrix consists of three tabs: "Cohort Overview" tab provides summary of the key characteristics (e.g. sample size, age range, license, etc.), sleep data availability (e.g. polysomnography EDF files, actigraphy, etc.) and links back to the dataset introduction page. Keep reading
The Nulliparous Pregnancy Outcomes Study: Monitoring Mothers-to-Be (nuMoM2b), which began in 2010, studies pregnant women who will be delivering for the first time (nulliparous women). This prospective cohort study evaluates the underlying, interrelated mechanisms of several common adverse pregnancy outcomes, which can be unpredictable in women who have little or no pregnancy history, to help guide their treatment. Keep reading
We are happy to announce the release of the One Year of Actigraphy (OYA) dataset on the National Sleep Research Resource. This is a unique personal project undertaken by a researcher dedicated to sleep science. The purpose of the project is to make a year's worth of one person's actigraphy data available to the research community in the spirit of promoting the creation of new methods for sleep and circadian data analysis. Keep reading
Earlier this week we deposited data from the Apnea, Bariatric surgery, and CPAP (ABC) study in the National Sleep Research Resource. ABC aimed to assess the role of bariatric (weight loss) surgery as compared to continuous positive airway pressure (CPAP) therapy plus weight loss counseling for the treatment of patients with class II obesity and those who have severe obstructive sleep apnea (OSA). Keep reading
We've recently pushed an update to the NSRR that drops support for versions v0.1.0, v0.1.1, and v0.2.0 of the NSRR gem. Version v0.2.0 was released on May 29, 2015 and many users have already updated to the newer v0.3.0 and v0.4.0 releases. If you are using one of these older releases you will need to update using following instructions. Keep reading
I am pleased to announce that data from the Home Positive Airway Pressure (HomePAP) study are now available. HomePAP took place between 2008 and 2010; it was a project in which 373 subjects at risk for obstructive sleep apnea (OSA) were randomized to either a laboratory-based or home-based pathway for diagnosis and (if necessary) titration. Keep reading
We've released a new update to our NSRR dataset downloader. To update to the latest version 0.4.0, type the following command: gem install nsrr --no-document In preparation for some upcoming changes, we've reviewed our installation instructions for Ruby as well. If you run into any issues installing Ruby on Windows, MacOS, or Linux, let us know on the forum or email us at support@sleepdata.org. For those who haven't already, we also now recommend the use of Ruby 2.3. Keep reading
Over the past two days we've updated EDFs across the site due to an issue identified with our original approach in scrubbing the EDF start date of recording. What Happened In order to have EDFs deidentified before being posted on the NSRR, the EDFs had their header start date set to "00.00.00". This seemed reasonable as it clearly indicated that the date had been removed, while adhering to the "dd.mm.yy" format for writing a date in the signal header. Keep reading
The 10th NSRR dataset went online earlier this month: Multi-Ethnic Study of Atherosclerosis (MESA) Sleep. The NSRR team worked closely with the Collaborative Health Studies Coordinating Center (CHSCC) to make these data available. Keep reading