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Illness denial questionnaire for patients and caregivers

Authors Rossi Ferrario S, Giorgi I, Baiardi P, Giuntoli L, Balestroni G, Cerutti P, Manera M, Gabanelli P, Solara V, Fornara R, Luisetti M, Omarini P, Omarini G, Vidotto G

Received 24 November 2016

Accepted for publication 23 January 2017

Published 23 March 2017 Volume 2017:13 Pages 909—916

DOI https://doi.org/10.2147/NDT.S128622

Checked for plagiarism Yes

Review by Single-blind

Peer reviewers approved by Prof. Dr. Roumen Kirov

Peer reviewer comments 2

Editor who approved publication: Dr Roger Pinder


Silvia Rossi Ferrario,1 Ines Giorgi,2 Paola Baiardi,3 Laura Giuntoli,4 Gianluigi Balestroni,1 Paola Cerutti,1 Marina Manera,2 Paola Gabanelli,2 Valentina Solara,5 Roberta Fornara,6 Michela Luisetti,1 Pierangela Omarini,1 Giovanna Omarini,1 Giulio Vidotto4

1Psychology Unit, Istituti Clinici Scientifici Maugeri SpA SB, Veruno, NO, Italy; 2Psychology Unit, 3Scientific Direction, Istituti Clinici Scientifici Maugeri SpA SB, Pavia, Italy; 4Department of General Psychology, University of Padova, Padova, Italy; 5Department of Neurology, ALS Centre, “Maggiore della Carita`” University Hospital, Novara, Italy; 6Psychology Unit, SS Trinità Hospital, Borgomanero, NO, Italy

Purpose: Interest in assessing denial is still present, despite the criticisms concerning its definition and measurement. We tried to develop a questionnaire (Illness Denial Questionnaire, IDQ) assessing patients’ and caregivers’ denial in relation to their illness/disturbance.
Patients and methods:
After a preliminary study, a final version of 24 dichotomous items (true/false) was selected. We hypothesized a theoretical model with three dimensions: denial of negative emotions, resistance to change, and conscious avoidance, the first two composing the actual Denial and the last representing an independent component of the illness denial behavior. The IDQ was administered to 400 subjects (219 patients and 181 caregivers) together with the Anxiety–Depression Questionnaire – Reduced form (AD-R), in order to assess concurrent validity. Confirmatory factor analysis (CFA), internal consistency indices (Cronbach’s α and McDonald’s ω), and test–retest analysis were performed.
Results: CFA and internal consistency indices (Cronbach’s α: 0.87–0.96) indicated a clear and meaningful three-factor structure of IDQ, for both patients and caregivers. Further analyses showed good concurrent validity, with Denial and its subscale negatively associated with anxiety and depression and avoidance positively associated with anxiety and depression. The IDQ also showed a good stability (r from 0.71 to 0.87).
Conclusion: The IDQ demonstrated good psychometric properties. Denial of negative emotions and resistance to change seem to contribute to a real expression of denial, and conscious avoidance seems to constitute a further step in the process of cognitive–affective elaboration of the illness.

Keywords: assessment, denial, avoidance, chronic diseases

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