An observational study in Chronic Stress Disorder, sponsored by Direction Centrale du Service de Santé des Armées. Recruiting at 1 site in France. Open to participants aged 18 Years to 65 Years, including healthy volunteers. Per ClinicalTrials.gov, last updated 2025-04-09.
Sponsored by Direction Centrale du Service de Santé des Armées · Observational
Since May 2024, New Caledonia has been experiencing a period of crisis. The organisation of the work of military personnel on the ground has been heavily impacted, with longer working hours, shorter rest periods and increased stress levels (uncertainty about the situation, lack of visibility, etc.).
Prolonged exposure to stress is accompanied by neuronal damage (Ramdani et al., 2024) and operational fatigue, a mindset that results from reversible neuronal damage and appears to be distinct from exhaustion. The aim of this study is to assess the impact of the crisis on the level of operational fatigue. In addition, identifying the organisational and human factors (Jaspers et al., 2024) that may have been protective against operational fatigue could help to optimise the way in which these factors are taken into account in the event of future crises, in order to promote resilience.
Military personnel face specific operational constraints related to their activity. These constraints require physiological adaptation, which can lead to overall biological wear and tear. In our case, the term 'operational wear and tear' refers to the mindset or mental state induced by operational constraints and the chronic stress they impose.
The soldiers deployed in New Caledonia since the riots in May 2024 have had to cope with operational constraints linked to their job, as well as those linked to the insurrection situation. By modifying the physical constraints (longer working hours, less sleep, etc.) and psychological constraints (for example, the unknown duration of the crisis), the current crisis in New Caledonia may have increased operational wear and tear.
The investigators hypothesise that soldiers present in New Caledonia when the riots began have accumulated additional stress related to the crisis and that this could result in greater operational wear and tear than soldiers transferred to New Caledonia in the summer of 2024. However, it is possible that the stress of moving to New Caledonia will counterbalance this effect. For this reason, the study is being conducted over 2 months, in order to assess the evolutionary profile of operational wear and tear.
This is a single-centre observational study of healthy military personnel in New Caledonia. Subjects will be volunteers and their participation or non-participation will not influence their ability to serve, their promotion or their career. Their superiors will not be informed of their participation or non-participation.
Military personnel will be given an oral presentation of the study. On this occasion, the information note will be distributed to them. If they are volunteers, they will have an inclusion visit, notify their non-objection and fill in the first questionnaire. Between two months later, they will complete the second questionnaire.
174 studies on the registry are indexed under Lacerations; 43 are open to participants now.
This study's planned enrollment of 200 is above the median of 100 across 37 observational studies indexed under Lacerations.
Browse Lacerations studies →Direction Centrale du Service de Santé des Armées is the lead sponsor of 95 studies on the registry; 33 are open to participants now.
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Serving military personnel aged between 18 and 65 posted to New Caledonia at the time of the study, i.e. between April and July 2025.
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Exclusion Criteria:
Subjects covered by articles L1121-5 to 1121-8 of the Public Health Code, i.e. :
Exposed group is the group of military personnel present in New Caledonia at the start of the crisis, i.e. in May 2024, and still posted to New Caledonia at the time of the study, i.e. in April 2025.
Other: No intervention
Control group is the group of military personnel not present in New Caledonia at the start of the crisis, i.e. in May 2024, posted to New Caledonia in the summer of 2024 and present at the time of the study, i.e. in April 2025.
No intervention
Assessing operational wear and tear linked to the crisis
Difference in the Burn-out Assesment Tool (Schaufeli et al., 2019) questionnaire score between exposed and control groups. This questionnaire consists of 23 items, each scored from 1 to 5. The sum of the scores for each item is then divided by 23 to give a final score of between 1 and 5. Subjects can then be classified as green (score \< 2.59), orange (2.59 to 3.02) and red (score \>3.02). The questionnaire contains sub-scores for 'exhaustion', 'mental distance', 'cognitive impairment', 'emotional impairment', 'psychological complaints' and 'psychosomatic complaints'.
Time frame: the questionnaire will be completed by the military in April 2025, i.e. 23 months after the start of the crisis for the exposed group
Assessing the impact of the crisis on Burn-out Assesment Tool sub-scores
Comparison of variations in Burn-out Assesment Tool sub-scores (Schaufeli et al., 2020) between the 'exposed' and 'unexposed' groups and the first and second questionnaire two month later. This questionnaire consists of 23 items, each scored from 1 to 5. The sum of the scores for each item is then divided by 23 to give a final score of between 1 and 5. Subjects can then be classified as green (score \< 2.59), orange (2.59 to 3.02) and red (score \>3.02). The questionnaire contains sub-scores for 'exhaustion', 'mental distance', 'cognitive impairment', 'emotional impairment', 'psychological complaints' and 'psychosomatic complaints'.
Time frame: Military personnel will complete the questionnaires in April 2025 and June 2025, i.e. there will be a two-month gap between the two sessions.
Assessing the benefits of raising awareness of organisational and human factors on operational wear and tear
Comparison of variations of the scores of the Burn-out Assesment Tool between the group sensitised to organisational and human factors and the group not sensitised to organisational and human factor on the first and second questionnaires. This questionnaire consists of 23 items, each scored from 1 to 5. The sum of the scores for each item is then divided by 23 to give a final score of between 1 and 5. Subjects can then be classified as green (score \< 2.59), orange (2.59 to 3.02) and red (score \>3.02). The questionnaire contains sub-scores for 'exhaustion', 'mental distance', 'cognitive impairment', 'emotional impairment', 'psychological complaints' and 'psychosomatic complaints'.
Time frame: Military personnel will complete the questionnaires in April 2025 and June 2025, i.e. there will be a two-month gap between the two sessions.
Determining the protective and vulnerability factors (such as Psychosocial Risks) to operational wear and tear
Search for correlations between scores on the Copenhagen Psychosocial Questionnaire (Kristensen et al., 2005) and Burn-out Assesment Tool scores. Burn-out Assesment Tool questionnaire consists of 23 items, each scored from 1 to 5. The sum of the scores for each item is then divided by 23 to give a final score of between 1 and 5. Subjects can then be classified as green (score \< 2.59), orange (2.59 to 3.02) and red (score \>3.02). The questionnaire contains sub-scores for 'exhaustion', 'mental distance', 'cognitive impairment', 'emotional impairment', 'psychological complaints' and 'psychosomatic complaints'. The Copenhagen Psychosocial Questionnaire consists of 22 items, each scored from 1 to 5. The sum of the scores for each item is then divided by 22 to give a final score of between 1 and 5. 1 is the best outcome, 5 is the worth outcome.
Time frame: Military personnel will complete the questionnaires in April 2025
Plan to share: No
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Direction Centrale du Service de Santé des Armées