Table 1

Outcomes and measures

DomainMeasuresTime point*
Primary outcomes
 PTSDStructured Clinical Interview for Diagnostic and Statistical Manual of Mental Disorders, fifth edition Disorders (SCID-5)28 Post-traumatic Stress Disorder Checklist for DSM-524 0 1 3 4
0 1 2 3 4
 MDSCID-5.28 Patient Health Questionnaire 923 0 1 3 4
0 1 2 3 4
Secondary outcomes
 ResilienceConnor-Davidson Resilience Questionnaire31
Wagnild Resilience Scale30 		0 1 3 4
0 1 3 4
 RuminationRuminative Responses Scale brooding subscale32
Responses to Intrusions Questionnaire dwelling subscale33 		0 1 3 4
 AnxietyGeneralised Anxiety Disorder seven-item scale34 0 1 3 4
 Smoking and Alcohol useSmoking Behaviour Questionnaire.1 Alcohol Use Questionnaire1 0 1 3 4
 Weight and HeightQuestionnaire recording participants’ height and weight1 0 1 3 4
 Psychological distressGeneral Health Questionnaire35 0 1 3 4
 Well-beingWarwick Edinburgh Mental Well-being Scale36 0 1 3 4
 Hormone functionLevel of cortisol in response to awakening and throughout the day0 1 3 4
 Immune functionLevel of C-reactive protein0 1 3 4
 Sleep problemsInsomnia Severity Index37 0 1 3 4
 Health economicsEuroQol 5 Dimensions Questionnaire38 0 1 3 4
Trimbos/iMTA Questionnaire for Costs Associated with Psychiatric Illness41 0 1 3 4
Client Service Receipt Inventory39 0 1 3 4
Health and Labour Questionnaire40 0 1 3 4
Tertiary outcomes
 NeuroticismEysenck Personality Questionnaire neuroticism subscale42 0 1 3 4
 Social supportSocial Support scale adapted from a brief measure of social support43 0 1 3 4
 DemographicsGeneral information questionnaire1 0 3 4
 Trauma exposureTrauma screener44 0 1 2 3 4
 Concrete thinkingConcrete thinking questionnaire, adapted from a previous concrete thinking assessment43 0 1 2 3 4
 IntrusionsDuration, frequency and distress linked to Intrusions Questionnaire44 0 1 2 3 4

  • *Time point: 0=baseline, 1=postintervention, 2=6-month follow-up, 3=12-month follow-up, 4=24-month follow-up.