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If Respiratory Disturbance Index (RDI) = 0, scorer has verified that this value is real.

References Quan, S.F., et al., The Sleep Heart Health Study: ...

Item from the Women's Health Initiative Insomnia Rating Scale. Levine et al.(2003) Search for all WHIIRS variables within this dataset

Item from the Women's Health Initiative Insomnia Rating Scale. Levine et al.(2003) Search for all WHIIRS variables within this dataset

Item from the Women's Health Initiative Insomnia Rating Scale. Levine et al.(2003) Search for all WHIIRS variables within this dataset

Item from the Women's Health Initiative Insomnia Rating Scale. Levine et al.(2003) Search for all WHIIRS variables within this dataset

Item from the Women's Health Initiative Insomnia Rating Scale. Levine et al.(2003) Search for all WHIIRS variables within this dataset

Item from the Women's Health Initiative Insomnia Rating Scale. Levine et al.(2003) Search for all WHIIRS variables within this dataset

Item from Insomnia Severity Index. (Morin CM, Insomnia, psychological assessment and management. Guilford Press, New York, 1993)[https://pubmed.ncbi.nlm.nih.gov/21532953/] Search for all ISI variables within this dataset

Item from Insomnia Severity Index. (Morin CM, Insomnia, psychological assessment and management. Guilford Press, New York, 1993)[https://pubmed.ncbi.nlm.nih.gov/21532953/] Search for all ISI variables within this dataset

Item from Insomnia Severity Index. (Morin CM, Insomnia, psychological assessment and management. Guilford Press, New York, 1993)[https://pubmed.ncbi.nlm.nih.gov/21532953/] Search for all ISI variables within this dataset

Item from the Women's Health Initiative Insomnia Rating Scale. Levine et al.(2003) Search for all WHIIRS variables within this datasetOriginal Question: Pick the answer that best describes how often you experienced the situation in the LAST 4 WEEKS. 7A. Did you have trouble falling asleep?

Item from the Women's Health Initiative Insomnia Rating Scale. Levine et al.(2003) Search for all WHIIRS variables within this datasetOriginal Question: Pick the answer that best describes how often you experienced the situation in the LAST 4 WEEKS. 7C. Did you wake up earlier than you planned to?

Item from the Women's Health Initiative Insomnia Rating Scale. Levine et al.(2003) Search for all WHIIRS variables within this datasetOriginal Question: Pick the answer that best describes how often you experienced the situation in the LAST 4 WEEKS. 7B. Did you wake up several times at night?

Calculated - The Women's Health Initiative Insomnia Rating Scale (WHIIRS) has 5 items. Each item is scored on a 5 point scale (from 0-4). The total score is the sum of all five items ranging from 0 to 20. Higher score indicates more severe insomnia. A score of 9 or higher is considered clinically significant insomnia. Levine et al.(2003) Search for all WHIIRS variables within this dataset

Item from Insomnia Severity Index. Morin (1993)Original question: Please rate the following symptoms for the past two (2) weeks. -Difficulty falling asleep Search for all ISI variables within this dataset

Item from Insomnia Severity Index. Morin (1993)Original question: Please rate the following symptoms for the past two (2) weeks. -Difficulty falling asleep Search for all ISI variables within this dataset

Item from Insomnia Severity Index. Morin (1993)Original question: Please rate the following symptoms for the past two (2) weeks. -Difficulty falling asleep Search for all ISI variables within this dataset

Summary score for the Insomnia Severity Index. Morin (1993) Each item is scored from 0 to 4. Total score is the sum of all seven items (0 to 28), and catergorized as: absence of insomnia (0 to 7), sub-threshold insomnia (8 to 14), moderate insomnia (15 to 21), and severe insomnia (22 to 28). Search for all ISI variables within this dataset

If Respiratory Disturbance Index (RDI) = 0, scorer has verified that this value is real.

Respiratory Disturbance Index (RDI) at >=2% desaturation or arousal [(total number of apneas and hypopneas with >=2% desaturation or arousal) / (hours of sleep)]

Non-rapid eye movement sleep (NREM) Respiratory Disturbance Index (RDI) at all desaturations [(total number of apneas and hypopneas in non-rapid eye movement sleep (NREM)) / (hours of non-rapid eye movement sleep (NREM))]