Doll therapy intervention for women with dementia living in nursing homes: a randomized single-blind controlled trial protocol

Roberta Vaccaro, Roberta Ballabio, Valentina Molteni, Laura Ceppi, Benedetta Ferrari, Marco Cantù, Daniele Zaccaria, Carla Vandoni, Rita Bianca Ardito, Mauro Adenzato, Barbara Poletti, Antonio Guaita, Rita Pezzati, Roberta Vaccaro, Roberta Ballabio, Valentina Molteni, Laura Ceppi, Benedetta Ferrari, Marco Cantù, Daniele Zaccaria, Carla Vandoni, Rita Bianca Ardito, Mauro Adenzato, Barbara Poletti, Antonio Guaita, Rita Pezzati

Abstract

Background: Doll therapy is a non-pharmacological intervention for people with dementia aimed to reduce distressing behaviours. Reliable results on the efficacy of Doll therapy for people with dementia are needed. The concept of attachment theorised by Bowlby has been proposed to explain the Doll therapy process, but it has not been proven to influence the response to doll presentation.

Methods/design: This single-blind, randomised controlled trial will involve people with dementia living in nursing homes of the Canton Ticino (Switzerland). Participants will be randomised to one of two interventions: Doll Therapy Intervention or Sham Intervention with a non-anthropomorphic object, using a 1:1 allocation ratio. The two interventions will consist of 30 daily sessions lasting an hour at most, led by a trained nurse for an hour at most. We will enrol 64 participants per group, according to power analysis using an estimated medium effect size (f = 0.25), an alpha level of 0.05, and a power of 0.8. The primary goal is to test the efficacy of the Doll Therapy Intervention versus the Sham Intervention as the net change in the following measures from baseline to 30 days (blinded outcomes): the Neuropsychiatric Inventory-Nursing Home administered by a trained psychologist blinded to group assignment, the professional caregivers' perceived stress scale of the Neuropsychiatric Inventory-Nursing Home, patients' physiological indices of stress (salivary cortisol, blood pressure and heart rate) and interactive behaviours. The secondary goal is to assess the relationship between attachment styles of people with dementia (detected by means of the Adult Attachment Interview to the patients' offspring) and their caregiving behaviours shown during the Doll Therapy Intervention.

Discussion: This is the first single-blind, randomised controlled trial on the efficacy of Doll therapy for dementia and an explanatory model of the response of people with dementia to doll presentation.

Trial registration: ClinicalTrials.gov, ID: NCT03224143. Retrospectively registered on 21 July 2017.

Keywords: Attachment; Behaviour; Caregivers; Dementia; Doll therapy.

Conflict of interest statement

The authors declare that they have no conflicts of interest.

Figures

Fig. 1
Fig. 1
Trial flow chart
Fig. 2
Fig. 2
The doll and the soft cube

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