The impact of necrotizing soft tissue infections on the lives of survivors: a qualitative study.

PURPOSE: Necrotizing soft tissue infections (NSTI) are potentially lethal infections marked by local tissue destruction and systemic sepsis, which require aggressive treatment. Survivors often face a long recovery trajectory. This study was initiated to increase understanding of the long-term impact of NSTI on health related quality of life (HRQoL), and how care may be improved. METHODS: Thematic analysis was applied to qualitative data from 25 NSTI-survivors obtained through two focus groups (n = 14) and semi-structured interviews (n = 11). RESULTS: The median age of the participants was 49 years, 14 were female. The median time since diagnosis was 5 years. Initial misdiagnosis was common, causing delay to treatment. Survivors experienced long-term physical consequences (scarring, cognitive impairment, fatigue, sleeping problems, recurrent infections), psychological consequences (traumatic stress symptoms, fear of relapse, adjusting to an altered appearance, sexual issues) and social and relational consequences (changes in social contacts, a lack of understanding). The disease also had a major psychological impact on family members, as well as major financial impact in some. There was a strong desire to reflect on 'mistakes' in case of initial misdiagnosis. To improve care, patient and family centered care, smooth transitions after discharge, and the availability of understandable information were deemed important. CONCLUSION: This study reveals that NSTI have a large impact on physical and psychosocial wellbeing of survivors and their relatives. Except for a few differences (misdiagnosis, fear for re-infection and actual re-infection), the patient experience of patients with NSTI is largely similar to those of burn survivors. Thus, questionnaires to assess HRQoL in burn survivors may be used in future NSTI studies.

Individual recovery of health-related quality of life during 18 months post-burn using a retrospective pre-burn measurement: an exploratory study.

PURPOSE: This study explored the individual trajectories of health-related quality of life (HRQL) compared to recalled pre-burn level of HRQL and investigated whether burn severity and post-traumatic stress disorder (PTSD) symptoms increase the risk of not returning to pre-burn level of HRQL. METHODS: Data were obtained from 309 adult patients with burns in a multicenter study. Patients completed the EQ-5D-3L questionnaire with a Cognition bolt-on shortly after hospital admission, which included a recalled pre-injury measure, and, again, at 3, 6, 12 and 18 months post-burn. Burn severity was indicated by the number of surgeries, and PTSD symptoms were assessed with the IES-R at three months post-burn. Pre- and post-injury HRQL were compared to norm populations. RESULTS: Recalled pre-injury HRQL was higher than population norms and HRQL at 18 months post-burn was comparable to population norms. Compared to the pre-injury level of functioning, four HRQL patterns of change over time were established: Stable, Recovery, Deterioration, and Growth. In each HRQL domain, a subset of patients did not return to their recalled pre-injury levels, especially with regard to Pain, Anxiety/Depression, and Cognition. Patients with more severe burns or PTSD symptoms were less likely to return to pre-injury level of functioning within 18 months post-burn. CONCLUSION: This study identified four patterns of individual change. Patients with more severe injuries and PTSD symptoms were more at risk of not returning to their recalled pre-injury HRQL. This study supports the face validity of using a recalled pre-burn HRQL score as a reference point to monitor HRQL after burns.

Improved and standardized method for assessing years lived with disability after burns and its application to estimate the non-fatal burden of disease of burn injuries in Australia, New Zealand and the Netherlands.

BACKGROUND: Burden of disease estimates are an important resource in public health. Currently, robust estimates are not available for the burn population. Our objectives are to adapt a refined methodology (INTEGRIS method) to burns and to apply this new INTEGRIS-burns method to estimate, and compare, the burden of disease of burn injuries in Australia, New Zealand and the Netherlands. METHODS: Existing European and Western-Australian health-related quality of life (HRQL) datasets were combined to derive disability weights for three homogenous burn injury groups based on percentage total body surface area (%TBSA) burned. Subsequently, incidence data from Australia, New Zealand, and the Netherlands from 2010 to 2017 were used to compute annual non-fatal burden of disease estimates for each of these three countries. Non-fatal burden of disease was measured by years lived with disability (YLD). RESULTS: The combined dataset included 7159 HRQL (EQ-5D-3 L) outcomes from 3401 patients. Disability weights ranged from 0.046 (subgroup < 5% TBSA burned > 24 months post-burn) to 0.497 (subgroup > 20% TBSA burned 0-1 months post-burn). In 2017 the non-fatal burden of disease of burns for the three countries (YLDs/100,000 inhabitants) was 281 for Australia, 279 for New Zealand and 133 for the Netherlands. CONCLUSIONS: This project established a method for more precise estimates of the YLDs of burns, as it is the only method adapted to the nature of burn injuries and their recovery. Compared to previous used methods, the INTEGRIS-burns method includes improved disability weights based on severity categorization of burn patients; a better substantiated proportion of patients with lifelong disability based; and, the application of burn specific recovery timeframes. Information derived from the adapted method can be used as input for health decision making at both the national and international level. Future studies should investigate whether the application is valid in low- and middle- income countries.

Predictors of health-related quality of life after burn injuries: a systematic review.

BACKGROUND: Identifying predictors of health-related quality of life (HRQL) following burns is essential for optimization of rehabilitation for burn survivors. This study aimed to systematically review predictors of HRQL in burn patients. METHODS: Medline, Embase, Web of Science, Cochrane, CINAHL, and Google Scholar were reviewed from inception to October 2016 for studies that investigated at least one predictor of HRQL after burns. The Quality in Prognostic Studies tool was used to assess risk of bias of included studies. RESULTS: Thirty-two studies were included. Severity of burns, postburn depression, post-traumatic stress symptoms, avoidance coping, less emotional or social support, higher levels of neuroticism, and unemployment postburn were found to predict a poorer HRQL after burns in multivariable analyses. In addition, weaker predictors included female gender, pain, and a postburn substance use disorder. Risk of bias was generally low in outcome measurement and high in study attrition and study confounding. CONCLUSIONS: HRQL after burns is affected by the severity of burns and the psychological response to the trauma. Both constructs provide unique information and knowledge that are necessary for optimized rehabilitation. Therefore, both physical and psychological problems require attention months to years after the burn trauma.

Course and Predictors of Pruritus Following Burns: A Multilevel Analysis.

Itch is a common problem after burns. Although the topic receives increasing attention, the number of prospective studies is limited. The aim of this study was to assess the influence of acute traumatic stress symptoms, controlled for injury characteristics, age and sex, on itch over a period of 18 months using multilevel analysis. A total of 226 respondents provided itch scores. Participants completed the Burn Itch Questionnaire during admission (n = 208) and at 3 (n =179), 12 (n =143) and 18 (n =99) months post-burn. They completed the Impact of Event Scale to assess acute traumatic stress symptoms during admission. Skin graft requirement, a higher level of acute traumatic stress symptoms and younger age were statistically significant predictors of a higher itch score. Younger age was particularly associated with higher itch scores during admission, whereas the effect of skin grafting was particularly observed at 3 months post-burn. This study replicates the predictive role of traumatic stress symptoms, which warrants further research.

Bayesian PTSD-Trajectory Analysis with Informed Priors Based on a Systematic Literature Search and Expert Elicitation.

There is a recent increase in interest of Bayesian analysis. However, little effort has been made thus far to directly incorporate background knowledge via the prior distribution into the analyses. This process might be especially useful in the context of latent growth mixture modeling when one or more of the latent groups are expected to be relatively small due to what we refer to as limited data. We argue that the use of Bayesian statistics has great advantages in limited data situations, but only if background knowledge can be incorporated into the analysis via prior distributions. We highlight these advantages through a data set including patients with burn injuries and analyze trajectories of posttraumatic stress symptoms using the Bayesian framework following the steps of the WAMBS-checklist. In the included example, we illustrate how to obtain background information using previous literature based on a systematic literature search and by using expert knowledge. Finally, we show how to translate this knowledge into prior distributions and we illustrate the importance of conducting a prior sensitivity analysis. Although our example is from the trauma field, the techniques we illustrate can be applied to any field.

Psychophysiological Processing of Itch in Patients with Chronic Post-burn Itch: An Exploratory Study.

A substantial proportion of patients with burn injury develop chronic itch, which can severely affect their quality of life. As found in research on chronic pain, different psychophysiological processes may also play a role in chronic itch, of which central sensitization, conditioned modulation, and attentional processes have been studied most frequently. This study aimed to explore psychophysiological processes of chronic post-burn itch by comparing 15 patients with long-term itch due to burn injury with 15 matched healthy controls. Exploratory results indicated tendencies for higher itch sensitivity in patients than in controls, for mechanical stimuli and histamine, but not for electrical stimulation. Results further suggest that the efficacy of itch modulation by an itch- or pain-conditioning stimulus or directing attention towards itch stimuli do not differ between these patients and controls. Further elucidation of the processes underlying post-burn itch may improve the early identification and treatment of burn patients developing chronic itch.

Child and adolescent internalizing and externalizing problems 12 months postburn: the potential role of preburn functioning, parental posttraumatic stress, and informant bias.

Adjustment after pediatric burn injury may be a challenge for children as well as their parents. This prospective study examined associations of internalizing and externalizing problems in children and adolescents 12 months postburn with preburn functioning, and parental acute and chronic posttraumatic stress symptoms (PTSS) from different perspectives. Child, mother, and father reports of 90 children (9-18 years), collected within the first month and 12 months postburn, were analyzed. Results indicated that overall, child and parental appraisals of pre- and postburn behavioral problems were not significantly different from reference data. Rates of (sub)clinical postburn behavioral problems ranged from 6 to 17 %, depending on the informant. Pre- and postburn behavioral problems were significantly related, but only from the parents' perspective. Path models showed an association between parental PTSS 12 months postburn and parental reports of child internalizing problems, as well as a significant indirect relationship from parental acute stress symptoms via PTSS 12 months postburn. Notably, no associations between parental PTSS and child reports of postburn behavioral problems were found. In conclusion, parental observations of child externalizing problems appear to be influenced by their perspectives on the child's preburn functioning, while parental observations of internalizing problems are also related to long-term parental PTSS. However, these factors seem of no great value in predicting behavioral problems from the child's perspective, suggesting substantial informant deviations. To optimize adjustment, clinical burn practice is recommended to adopt a family perspective including parent perception of preburn functioning and parental PTSS in assessment and intervention.

Itch in burn areas after skin transplantation: patient characteristics, influencing factors and therapy.

Pruritus is a frequently encountered symptom following burns. Higher intensity of itching has been associated with depth of the wounds and specific body locations but these differences are not well understood. Our aim was to investigate the intensity of post burn pruritus in grafted and non-grafted burns across anatomic areas and to report on itch-inducing factors and applied treatments. The study included 226 patients prospectively followed for 18 months. Results showed that grafted patients and non-grafted patients reported similar overall itch intensity in-hospital. At 3 months post burn, grafted patients had higher overall itch scores, a difference that was found robust across the study period. Grafted wounds were found to produce higher mean itch intensity at 3 months post burn but this difference disappeared at 12 months post burn. Differences in itch prevalence rates were found across anatomic areas, but only in non-grafted burns. The differences in itch intensity on patient level versus wound level suggest that on the longer run, peripheral mechanism do not explain the higher itch scores in grafted patients.

Coping with burns: the role of coping self-efficacy in the recovery from traumatic stress following burn injuries.

We conducted a three-wave prospective study among patients with burns (N = 178) to examine the prospective influence of coping self-efficacy (CSE) perceptions on trajectories of posttraumatic stress symptoms in the first 12 months after burn injuries. Using linear growth curve modeling, we corrected for demographics, the number of surgeries during initial admittance, trait coping styles, and changing levels of health-related quality of life. CSE during initial admission was by far the strongest predictor of both initial PTSD symptoms and degree of symptom change with higher CSE levels associated with lower initial symptoms and a steeper decline of symptoms over time. Of the other variables only avoidant coping was associated with higher initial symptom levels, and only emotional expression associated with greater rate of recovery. Current findings suggest that CSE plays a pivotal role in recovery from posttraumatic stress after a burn injury, even when the role of burn-related impairments is taken into consideration. Implications of findings are discussed.

Parenting Stress Related to Behavioral Problems and Disease Severity in Children with Problematic Severe Asthma.

Our study examined parenting stress and its association with behavioral problems and disease severity in children with problematic severe asthma. Research participants were 93 children (mean age 13.4 ± 2.7 years) and their parents (86 mothers, 59 fathers). As compared to reference groups analyzed in previous research, scores on the Parenting Stress Index in mothers and fathers of the children with problematic severe asthma were low. Higher parenting stress was associated with higher levels of internalizing and externalizing behavioral problems in children (Child Behavior Checklist). Higher parenting stress in mothers was also associated with higher airway inflammation (FeNO). Thus, although parenting stress was suggested to be low in this group, higher parenting stress, especially in the mother, is associated with more airway inflammation and greater child behavioral problems. This indicates the importance of focusing care in this group on all possible sources of problems, i.e., disease exacerbations and behavioral problems in the child as well as parenting stress.

Cognitive emotion regulation strategies and neuroticism in relation to depressive symptoms following burn injury: a longitudinal study with a 2-year follow-up.

Sustaining burns is considered a stressful life event that has the power to elicit depressive symptoms. This study aimed to identify predictors of depressive symptoms by investigating the role of demographic variables, the number of operations (burn severity), neuroticism, and cognitive emotion regulation styles as possible influencing factors. Data from 242 patients with burns were analyzed employing latent growth modeling. The level of depressive symptoms across the 2-year interval was associated with burn severity, higher levels of neuroticism and rumination, and lower levels of positive refocusing. Notably, rumination partly mediated the effect of neuroticism on the course of depressive symptoms. Correlational analysis suggested a specific effect of burn severity on rumination. The results indicate that screening for symptoms of depression, rumination, and neuroticism in burn patients is useful. Early interventions focusing on cognitive restructuring could assist in improving the cognitive emotional adaptation process following a burn event.

The relationship between behavioural problems in preschool children and parental distress after a paediatric burn event.

This study examines mother- and father-rated emotional and behaviour problems in and worries about 0- to 5-year-old children at 3 and 12 months after a burn event and the relation with parental distress. Mothers (n = 150) and fathers (n = 125) representing 155 children participated in this study. Child emotional and behaviour problems and parental worries about the child were assessed with the Child Behavior Checklist at both time points. Parents' level of acute subjective distress was assessed within the first month after the burn event with the Impact of Event Scale. Mothers and fathers held comparable views of their child's emotional and behaviour problems, which were generally within the normal limits. Parents' own acute stress reactions were significantly related to parent-rated child behaviour problems at 3 and 12 months postburn. A substantial part of mothers' and fathers' worries about the child concerned physical and emotional aspects of the burn trauma, and potential future social problems. Parents with high acute stress scores more often reported burn-related concerns about their child at 3 and 12 months postburn. Health-care professionals should be informed that parents' distress in the subacute phase of their child's burn event may be related to subsequent worries about their child and to (parent-observed) child emotional and behaviour problems. The authors recommend a family perspective, with particular attention for the interplay between parents' distress and parent-reported child behaviour problems and worries, in each phase of paediatric burn care.

Gender differences in relation to stigmatization and depressive symptoms after burns.

OBJECTIVES: The aim of this study was to investigate the moderating role of gender in the relationship between burn severity, perceived stigmatization and depressive symptoms at multiple time points postburn. MATERIALS AND METHODS: This multi-center study included data from two cohorts. Cohort 1 consisted of 215 burn survivors, participating in a longitudinal study with measures at 3 and 12 months postburn. Cohort 2 consisted of 180 burn survivors cross-sectionally assessed at 5 - 7 years postburn. Both cohorts completed self-reported measures of perceived stigmatization and depressive symptoms. The number of acute surgeries (i.e., no surgery, 1 surgery or 2 or more surgeries) was used as indicator of burn severity. Relations between number of surgeries, depressive symptoms, and perceived stigmatization, including possible indirect effects, were evaluated with gender-specific path models. RESULTS: In both men and women, number of surgical operations was related to higher levels of depressive symptoms and perceived stigmatization at 3 months after burn. In women, number of operations was still directly related to both constructs at 12 months after burn, which was cross-sectionally confirmed in the 5-7 years after burn cohort. In men, from 3 to 12 months after burn, depressive symptoms and perceived stigmatization were bidirectionally related, and, through these effects, number of surgeries was indirectly related to both outcomes. In the cross-sectional 5-7 years after burn cohort, number of operations was related to stigma but not to depressive symptoms of men. CONCLUSION: Number of operations had a different effect on psychosocial adaptation of male and female burn survivors. In women, a persistent direct link from number of operations to both depressive symptoms and perceived stigmatization was found over time. In men, the effect of number of operations was most evident in the short-term, after which perceived stigmatization and depressive symptoms became interrelated. This indicates that burn severity remains a factor of significance in psychological adjustment in women, whereas in men, this significance seems to decrease over time.

Perceived stigmatization and fear of negative evaluation: Two distinct pathways to body image dissatisfaction and self-esteem in burn survivors.

OBJECTIVE: Scars resulting from burn injury can pose social and psychological problems that may affect body image and self-esteem. This study aimed to investigate whether burn severity, age and female gender are associated with body image dissatisfaction and self-esteem, through an association with perceived stigmatization and fear or negative evaluation. DESIGN & MAIN OUTCOME MEASURES: Burn survivors (N = 224) completed the Fear of Negative Evaluation scale (FNE) and the Perceived Stigmatization Questionnaire (PSQ) at 3 months post-burn, and the Rosenberg Self-Esteem scale (RSE) and the Satisfaction with Appearance scale (SWAP) at 6 months post-burn. Path analysis was used to test the relationships. RESULTS: Body image dissatisfaction and self-esteem were moderately associated. Burn severity was directly and indirectly associated with body image dissatisfaction through perceived stigmatization. Female gender and age were indirectly associated with body image dissatisfaction though fear of negative evaluation. Age was indirectly associated with both perceived stigmatization and fear of negative evaluation. Perceived stigmatization and fear of negative evaluation were associated with self-esteem through body image dissatisfaction, the first indirectly and the latter both directly and indirectly. CONCLUSIONS: Findings highlight that both burn-specific factors and psychological vulnerability should be taken into account to deal with social challenges that may affect body image and self-esteem after burns.

Acute stress reactions in couples after a burn event to their young child.

OBJECTIVE: This multicenter study examines acute stress reactions in couples following a burn event to their preschool child. METHODS: Participants were 182 mothers and 154 fathers, including 143 couples, of 193 children (0-4 years) with acute burns. Parents' self-reported acute stress reactions and emotions regarding the burn event were measured within the first month postburn. RESULTS: More mothers than fathers reported clinically significant acute stress reactions. Multilevel analysis revealed that individual parent reactions were associated with parent gender and negative emotions about the burn event. Interestingly, avoidance symptoms overlapped to an important extent within couples, whereas intrusion symptoms were mainly intra-individual. Burn characteristics, such as burn size, contributed to acute stress within couples. CONCLUSIONS: Mothers and fathers are seriously affected by their child's burn trauma and share a part of their acute stress reactions. These results emphasize the importance of a family-based approach to support adjustment after pediatric medical trauma.

Posttraumatic stress symptoms and interpersonal processes in burn survivors and their partners.

Background: A burn event can elicit symptoms of posttraumatic stress disorder (PTSD) in survivors and their partners and may impact the way these couple members interact with each other. They may try to protect each other from further emotional distress by avoiding talking about the burn event, but they may also show concern towards each other.Objective: The aim of this study was to investigate bidirectional relationships between survivor's and partner's PTSD symptoms and two interpersonal processes: partner-oriented 'self-regulation', which is avoidance-oriented, and 'expressed concern', which is approach-oriented.Method: In this longitudinal multi-centre study, 119 burn survivors and their partners participated. Measures of PTSD symptoms, self-regulation, and expressed concern were administered in the acute phase following the burns, and follow-ups took place up to 18 months postburn. Intra- and interpersonal effects were examined in a random intercept cross-lagged panel model. Exploratory effects of burn severity were also investigated.Results: Within individuals, survivor's expressed concern predicted later higher levels of survivor's PTSD symptoms. In their partners, self-regulation and PTSD symptoms reinforced each other in the early phase postburn. Between the two couple members, partner's expressed concern predicted later lower levels of survivor's PTSD symptoms. Exploratory regression analyses showed that burn severity moderated the effect of survivor's self-regulation on survivor's PTSD symptoms, indicating that self-regulation was continuously related to higher levels of PTSD symptoms over time within more severely burned survivors, but not in less severely burned survivors.Conclusion: PTSD symptoms and self-regulation reinforced each other in partners and possibly also in more severely burned survivors. Partner's expressed concern was related to lower levels of survivor's PTSD symptoms, whereas survivor's expressed concern was related to higher levels of survivor's PTSD symptoms. These findings emphasize the importance of screening for and monitoring PTSD symptoms in burn survivors and their partner and of encouraging couple's self-disclosure.

PTSD symptoms in burn survivors and their partners are related to both avoidance- and approach-oriented interpersonal processes.In partners, higher levels of self-regulation were bidirectionally related to higher levels of posttraumatic stress symptoms.Concern expressed by partners may mitigate posttraumatic stress symptoms in burn survivors.

No indications for altered EEG oscillatory activity in patients with chronic post-burn itch compared to healthy controls.

A large proportion of patients with burn injuries develop chronic itch, which impacts quality of life. The underlying pathophysiological mechanisms are poorly understood. This cross-sectional pilot study investigates whether altered cortical oscillatory processes are involved in chronic post-burn itch. Continuous electroencephalography (EEG) data were recorded during rest and stimulation of non-injured skin, inducing itch (histamine and electrical) and cold-pressor task pain for 15 adults with chronic post-burn itch and 15 matched healthy controls. Quantitative metrics comprised oscillatory power and peak frequencies in theta, alpha, and beta bands. No statistical differences between patients and healthy controls were found in oscillatory activity during rest or stimulation, with Bayesian analysis suggesting equivocal evidence. However, post-traumatic stress symptoms and duration of chronic itch may be associated with changes in oscillatory activity. A lack of differences in cortical oscillatory processing and itch levels at non-injured sites, suggests that itch symptoms have a localised character in this sample of patients with post-burn itch. For future studies, a biopsychological approach with integration of peripheral and central nervous system techniques, linear and non-linear EEG analysis, injured and non-injured stimulation sites, and incorporation of individual characteristics is recommended. Insight into pathophysiological mechanisms underlying chronic post-burn itch could improve diagnostics and treatments.

Activity Impairment, Work Status, and Work Productivity Loss in Adults 5-7 Years After Burn Injuries.

An important aspect of the rehabilitation of burn patients is social participation, including daily activities and work. Detailed information on long-term activity impairment and employment is scarce. Therefore, we investigated activity impairment, work status, and work productivity loss in adults 5-7 years following burn injuries, and investigated associations with burn-specific health-related quality of life (HRQL) domains. Adult participants completed the Work Productivity and Activity Impairment General Health questionnaire and the Burn Specific Health Scale-brief (BSHS-B) 5-7 years post-burn. Outcomes were compared between participants with mild/intermediate and severe burns (>20% total body surface area burned). Seventy-six (36%) of the 213 participants experienced some degree of activity impairment due to burn-related problems 5-7 years post-burn. Seventy percent of the population was employed; 12% of them experienced work productivity loss due to burn-related problems. Nineteen percent reported changes in their work situation (partly) because of the burn injury. A higher proportion of participants with severe burns had activity impairments (56% vs 29%; P = .001) and work productivity loss (26% vs 8%; P < .001) compared to participants with mild/intermediate burns. Activity impairment and work productivity loss were both associated with burn-related work problems and lower mood, measured with the BSHS-B. In conclusion, a substantial part of the study population experienced activity impairment and work productivity loss, was unemployed, and/or reported changes in their work situation due to their injury. Particularly patients with severe burns reported productivity loss and had lower employment rates. This subscribes the importance of addressing work-related functioning in the rehabilitation of burn patients.

Reliability and structural validity of the Dutch version of Perceived Stigmatization Questionnaire in adults with burns.

OBJECTIVE: Burn scars can attract attention from others which can be perceived as stigmatizing behavior with negative psychological consequences. The Perceived Stigmatization Questionnaire (PSQ) is a validated instrument measuring the perception of stigmatization in burn survivors. The objective of this study was to examine the psychometric properties of the Dutch version of the PSQ, specifically its factor structure, reliability, and associations with other relevant constructs. METHOD: Patients (N = 220) completed the PSQ at 3 months after burn. The factor structure was examined with explorative (EFA) and confirmatory (CFA) factor analyses at 3 and 12 months after burn, and reliability was examined using Cronbach's alpha. Three months measurements were used to examine associations of the PSQ with 'depressive mood' (Beck Depression Inventory, BDI-II), 'interpersonal relations' and 'body image' (Burn Specific Health Scale-Brief, BSHS-B), and two scales of the Illness Invalidation Inventory (3*I). RESULTS: A four factor model showed the best fit to the data. Two factors, 'confused/staring behavior' and 'hostile behavior', were identical to the original PSQ. The third original factor, 'absence of friendly behavior', was now divided into two factors separating absence of friendly behavior of strangers and other people. Internal consistency ranged from .60 to .88. Especially the 'confused/staring behavior' factor was related to the other questionnaire scores. CONCLUSION: The current study shows acceptable reliability and structural validity of the Dutch version of the PSQ in a 4-factor solution. Further research into measurement invariance across languages is recommended to establish a uniform multicultural instrument.