French validation of the tonic immobility scale in patients with post-traumatic stress disorder - 04/09/24

Doi : 10.1016/j.ejtd.2024.100449

Andrew Laurin ^a,^⁎ , Jean-Benoît Hardouin ^b,^{^{1
indicates equal participation by both authors}}, Morgane Pere ^c,^{^{1
indicates equal participation by both authors}}, Maëlle Fauvre ^d, Hugo Bottemanne ^e, Raphaëlle Richieri ^f, Alain Brunet ^g, Maud Rötharmel ^h, Wissam El-Hage ⁱ, Samuel Bulteau ^j, Thibault Deschamps ^k, Anne Sauvaget ^a
^a Nantes Université, CHU Nantes, Movement - Interactions - Performance, MIP, UR 4334 F-44000 Nantes, France
^b University of Nantes, University of Tours, INSERM, SPHERE U1246 F-44000, Nantes, France
^c CHU Nantes, Department of Biostatistics F-44000, Nantes, France
^d Nantes Université, CHU Nantes F-44000 Nantes, France
^e MOOD Center, Bicêtre Hospital, Department of psychiatry, Paris-Saclay University, INSERM, Assistance Publique-Hôpitaux de Paris (AP-HP), Paris, France
^f Aix Marseille Univ, CNRS, Centrale Marseille, Institut Fresnel, Marseille, France
^g McGill University and Douglas Institute Research Center of the CIUSSS-ODIM, 6875 Bd LaSalle, Verdun, QC H4H 1R3, Canada
^h University Department of Psychiatry, Therapeutic Centre of Excellence, Institute of Psychiatry – Rouvray Hospital Centre F-76300 Sotteville-lès-Rouen, France
ⁱ UMR 1253, iBraiN, Université de Tours, CHRU de Tours, INSERM, Tours, France
^j Nantes Université, CHU Nantes, INSERM, MethodS in Patients-centered outcomes and HEalth Research, SPHERE F-44000 Nantes, France
^k Nantes Université, Movement - Interactions - Performance, MIP, UR 4334 F-44000 Nantes, France

^∗Corresponding author: University of Nantes, Laboratory ‘Movement, Interactions, Performance’ (E.A. 4334) F-44000, Nantes, France.University of NantesLaboratory ‘MovementInteractions, Performance’ (E.A. 4334)NantesF-44000France

Abstract

Introduction

: Tonic immobility (TI) in humans is characterized by muscle inhibition, hypertonia and analgesia that may occur during a traumatic event. TI is associated with an increased risk of severe and treatment-resistant post-traumatic stress disorder (PTSD). To date, there is no French validated scale for TI.

Methods

: We studied the face validity (qualitative study) and psychometric properties concerning a French version of the 10-item Tonic Immobility Scale (FR-TIS) in adult with PTSD.

Results

: Concerning face validity, six participants confirmed that the FR-TIS was simple, clear, and comprehensible, but has some limitations concerning the recall according to age of trauma, peritraumatic dissociation intensity, avoidance behaviors, the type and the context of the trauma. For psychometric properties, 120 patients completed a computerized version of the FR-TIS. FR-TIS showed good psychometric properties in a three-dimensional form with 8 items (Root Mean Square Error of Approximation (RMSEA) = 0.056) including 4 items for TI (Cronbach's α = 0.76), 2 items for fear (Cronbach's α = 0.63), 2 items for dissociation (Cronbach's α = 0.68).

Conclusion

: The FR-TIS is a potentially useful and easy-to-use tool in clinical practice, to help improving screening and assessment of TI

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Keywords : Tonic immobility, Post-traumatic stress disorder, Rating Scale, Psychometric, Validation

Plan

Patients and data collection

Psychometric properties

Discussion

Conclusion

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Vol 8 - N° 4

Article 100449- décembre 2024 Retour au numéro

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French validation of the tonic immobility scale in patients with post-traumatic stress disorder - 04/09/24

Abstract

Introduction

Methods

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Conclusion

Plan

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