Browsing Bergen Open Research Archive by Author "Cummings, Jeffrey"

Now showing items 1-2 of 2

    • An Actigraphy-Based Validation Study of the Sleep Disorder Inventory in the Nursing Home 

      Hjetland, Gunnhild Johnsen; Nordhus, Inger Hilde; Pallesen, Ståle; Cummings, Jeffrey; Tractenberg, Rochelle E.; Thun, Eirunn; Kolberg, Eirin; Flo, Elisabeth (Journal article; Peer reviewed, 2020-03-13)
      Background: Disrupted sleep is common among nursing home patients with dementia and is associated with increased agitation, depression, and cognitive impairment. Detecting and treating sleep problems in this population are ...

    • The Truth behind the Zeros: A New Approach to Principal Component Analysis of the Neuropsychiatric Inventory 

      Hellton, Kristoffer Herland; Cummings, Jeffrey; Vik-Mo, Audun Osland; Nordrehaug, Jan Erik; Aarsland, Dag; Selbæk, Geir; Melvær, Giil Lasse (Journal article; Peer reviewed, 2021)
      Psychiatric syndromes in dementia are often derived from the Neuropsychiatric Inventory (NPI) using principal component analysis (PCA). The validity of this statistical approach can be questioned, since the excessive ...