Joachim,
Sleep Heart Health Studies were collected prior to AASM rules and do not follow the standard AASM guidelines for hypopnea scoring. Please refer to the manual referenced above for respiratory event scoring procedures.
Best,
Stephanie
Signals such as the ones you list are available in the datasets. Available signals vary per dataset. Individual studies can be downloaded.
Andrey,
I agree with Mike that you can obtain a count of "obstructive apneas with arousals but WITHOUT a >=4% oxygen desaturation (NREM/Supine)" by taking the difference of 'oanba4' and 'oanbp4'.
Unfortunately, with the variables that are available, there is not a way to determine OAs WITHOUT Arousals, but WITH >=4% desaturations (in NREM, Supine sleep). You will need to use the raw data to assess this.
Hi Sarah,
I compared your values/amounts to the values/amounts in the software. While I agree with Remo Mueller that I am not seeing the same negative HPos values, my duration amounts are equivalent to your calculations. I would agree that you can ignore the -0.5 value. It appears that the studies start with a “?” annotation that occurs for 1 second, so disregard. In regard to the values:
S (Supine) = -0.4 LL (Lateral Left) = -0.3 LR (Lateral Right) = -0.2 PL(Prone Left) = -0.1 PR(Prone Right) = 0 U (Upright) = 0.1
Hi Jennifer,
The LOC and ROC signals are the EOG signals.
Hi Steven,
Thanks for viewing the National Sleep Research Resource! You may find the MrOs cohort suits your needs.
Hello,
The high-pass hardware filters for the instrument were 0.15 Hz for EEG channels. There was no ability to set a high filter (low band pass) at acquisition; signal collection began at the mechanical low filter start-up (0.15 or 0.05) and continued to collect without a frequency cut-off.
Best, Stephanie