Criteria For Prolonged Grief Disorder Research Articles

ICD-11 and DSM-5-TR prolonged grief symptoms and quality of life: A criterion validity test.

Two similar but distinct versions of prolonged grief disorder (PGD) have recently been included in the International Classification of Diseases eleventh edition (ICD-11) and the Diagnostic and Statistical Manual of Mental Disorders - fifth edition, Text-Revision (DSM-5-TR). This study provides a criterion validity test of both new criteria sets of PGD, by examining concurrent and longitudinal associations of ICD-11 and DSM-5-TR prolonged grief symptoms with quality of life (QOL). Bereaved adults completed a survey assessing ICD-11 and DSM-5-TR prolonged grief symptoms, depressive symptoms, insomnia symptoms and QOL at baseline and 6-month follow-up. Both ICD-11 and DSM-5-TR prolonged grief symptoms related negatively to QOL concurrently, while controlling for insomnia and depressive symptoms. ICD-11 prolonged grief symptoms, but not DSM-5-TR prolonged grief symptoms, predicted QOL at 6-month follow-up, while controlling for baseline QOL and insomnia and depression symptoms. Results provide consistent evidence for the criterion validity of ICD-11 PGD, but mixed evidence for the criterion validity of DSM-5-TR PGD. Study results can help guide attempts to optimize and harmonize future PGD criteria.

Understanding prolonged grief from an existential counseling perspective

AbstractIn this article, we examine prolonged grief through an existential theoretical lens. In particular, we critically compare criteria for prolonged grief disorder with existential theoretical principles, including existential phenomenology, existential relatedness, and existential givens of human existence: death anxiety, existential freedom, existential isolation, and existential meaning/meaninglessness. We explore how existential perspectives and principles provide a clinically useful explanation for the presence and etiology of many of the symptoms of prolonged grief. We also describe counseling implications for treating prolonged grief phenomenologically, relationally, and through the lens of the four existential givens.

Latent trajectories of DSM-5-TR-based Prolonged Grief Disorder: findings from a data pooling project MARBLES

ABSTRACT Background: With the release of the text revision of the Diagnostic and Statistical Manual of Mental Disorders, 5th edition (DSM-5-TR), criteria for Prolonged Grief Disorder (PGD) were included. This necessitates studying grief trajectories based on these criteria. Objective: This is the first study examining latent trajectories of DSM-5-TR-based PGD symptom levels and testing whether specific risk factors (e.g. cause of death) predicted PGD trajectories. Method: We evaluated latent DSM-5-TR PGD trajectories using pooled existing data collected at 6–12, 13–24, and 25–60 months post-loss in Danish and Dutch bereaved adults (N = 398). Latent Growth Mixture Modelling (LGMM) was employed to determine the trajectories. Multinomial logistic regression analyses were used to examine which risk factors predicted class membership. Results: The four-class LGMM solution with a quadratic term was best-fitting the data. This solution represented four trajectories: High stable PGD (6%), High PGD quick recovery (10%), High PGD slow recovery (35%), and Low PGD symptoms (49%). Participants with a higher educational level were more likely to be assigned to the Low PGD symptoms trajectory compared to High stable PGD and High PGD slow recovery trajectories. Unnatural causes of death increased the likelihood of being in the High stable PGD and High PGD slow recovery trajectories compared to the Low PGD symptoms trajectory. Conclusions: Consistent with prior research, the Low PGD symptoms trajectory was the most common. A significant minority experienced high and stable levels of PGD within five years after the loss. About one-third of participants experienced high acute grief levels that decreased slowly; how slow decreasing symptoms relate to an individual’s functioning requires further attention. This study demonstrates that a significant minority of bereaved people develop acute PGD symptomatology that does not diminish within five years post-loss, emphasizing the need for early screening for PGD to prevent long-lasting complaints.

A qualitative phenomenological exploration of prolonged grief in New Delhi, India.

Prolonged grief disorder (PGD) is a condition characterized by difficulty in coping effectively with the loss of loved ones. The proposed diagnostic criteria for PGD have been based predominantly on research from developed Western nations. The cultural variations associated with experience and expression of grief and associated mourning rituals have not been considered comprehensively. The current study aimed to understand the experience of prolonged grief in India through a qualitative enquiry with mental health professionals (focus group discussions) and affected individuals (key informant interviews). Several novel findings diverging from the current understanding of manifestation and narratives of PGD emerged from the study, including differences in the social contexts of bereavement and culture-specific magico-religious beliefs and idioms of distress. The findings point to limitations of existing diagnostic systems for PGD. The results of this study suggest that the assumption of content equivalence for psychiatric disorders across cultures may not be justified and that there is a need to develop culturally sensitive diagnostic criteria and assessment scales for PGD.

Prolonged Grief Disorder: Addressing Misconceptions With Evidence

There are many misconceptions about Prolonged Grief Disorder (PGD). We show with data that PGD is a diagnosis that applies to a rare few of mourners who are at risk of significant distress and dysfunction. Those mourners who meet criteria for PGD have been shown to benefit from specialized, targeted treatment for it. The case against PGD is empirically unsubstantiated, and the need for scientific examination of effective treatments is warranted.

Psychometric evaluation of the Swedish Traumatic Grief Inventory Self-Report Plus (TGI-SR+) in bereaved parents.

The International Classification of Diseases Eleventh Edition (ICD-11), and the Diagnostic and Statistical Manual of Mental Disorders, Fifth Edition, Text Revision (DSM-5-TR), now include prolonged grief disorder (PGD). Since criteria for PGD in both classification systems differ from prior proposed grief disorders and each other, the validation of a single instrument to screen for prolonged grief (PG) symptoms of both new diagnoses is critical for bereavement research and care. Therefore, we evaluated the psychometric properties of the Swedish version of the Traumatic Grief Inventory Self-Report Plus (TGI-SR+). Two-hundred and forty-eight bereaved parents completed questions about sociodemographic and loss-related variables, the TGI-SR+, and symptom measures of post-traumatic stress (PTS), depression and an older measure of PG symptoms, the Prolonged Grief Disorder-13 (PG-13). Confirmatory factor analyses showed that a one-factor model best fit DSM-5-TR and ICD-11 PG symptoms and the analyses of the internal consistency and inter-item correlations showed that these symptoms could be reliably assessed. In support of convergent validity, DSM-5-TR and ICD-11 PG symptoms correlated with symptoms of PTS, depression and PG assessed with the PG-13. In support of known-groups validity, DSM-5-TR and ICD-11 PG symptoms were higher among lower educated (vs. higher educated) participants and related negatively to time since loss. ROC analyses showed optimal cut-off score of ≥71 and ≥72 to determine probable caseness for DSM-5-TR and ICD-11 PGD, respectively. Results support the reliability and validity of the Swedish TGI-SR+ as a screening instrument for PG in research and bereavement care.

Bereavement issues and prolonged grief disorder: A global perspective.

The death of a loved one - bereavement - is a universal experience that marks the human mental health condition. Grief - the cognitive, emotional, and behavioral responses to bereavement - is thus experienced by virtually everyone at some point in life, while mourning is a process through which grievers come to terms with the loss envisioning life without the deceased. Although distress subsides over time among most bereaved individuals, a minority will develop a condition recently identified as prolonged grief disorder (PGD). The present review provides a global perspective on bereavement, grief reactions, and PGD. Although the loss of a loved one and grief reactions are in general experienced consistently across different cultures, differences and variations in their expression may exist across cultures. Especially within specific populations that may be more at risk for PGD, possibly due to risk factors associated with the mechanisms of loss (e.g., refugees, migrants, and conflict survivors). The diagnostic criteria for PGD are mostly based on Western grieving populations, and cultural adaptations of PGD treatments are limited. Therefore, cross-cultural development and validation of PGD screening/assessment is critical to support future research on grief reactions and PGD, especially in non-Western contexts, and concerning the potential future global changes and challenges that appear to have a major impact on PGD. More transcultural research on PGD is needed to contextualize and will lead to culture-bound symptom identification of PGD, and the adaptation of current treatment protocols, which may ultimately improve health at the individual level, and health-care systems.

Pandemic grief risk factors and prolonged grief disorder in bereaved young adults during COVID-19.

This study evaluated whether COVID-19-specific risk factors (e.g., feeling guilty for not being present with the deceased at the time of the loss and feeling emotionally distant from the deceased prior to the loss) were associated with prolonged grief disorder (PGD) symptomatology or diagnosis among young adults bereaved due to any cause (e.g., illness and violent loss). We surveyed 196 young adults who had a family member/close friend die during the COVID-19 pandemic. Participants completed the PGD-12 Questionnaire and the 10-item Pandemic Grief Risk Factors (PGRF) Questionnaire. More time spent with the deceased before the loss and greater endorsement of pandemic grief risk factors were associated with increased PGD symptoms and a greater likelihood of meeting the diagnostic criteria for PGD. The COVID-19 pandemic created unique risk factors that affected the grieving process for bereaved individuals, regardless of whether the death was related to COVID-19 infection. These findings add to a growing body of literature examining grief and loss within the unique context of the COVID-19 pandemic and suggest that there may be detrimental long-term psychological outcomes for these bereaved individuals, regardless of the cause of death. Routine screening for these unique risk factors in medical and psychological clinics is warranted to help identify those individuals who could benefit from early intervention. Also, it will be important to understand and possibly modify evidence-based interventions and prevention programs to directly address the identified unique PGRF.

The Traumatic Grief Inventory-Clinician Administered: A psychometric evaluation of a new interview for ICD-11 and DSM-5-TR prolonged grief disorder severity and probable caseness

BackgroundThere is a need for an interview-based measure to assess Prolonged Grief Disorder (PGD) included in the text revision of the fifth Diagnostic and Statistical Manual for Mental Disorder (DSM-5-TR) and 11th edition of the International Classification of Disease (ICD-11). We evaluated the psychometric properties of the Traumatic Grief Inventory-Clinician Administered (TGI-CA); a new interview measuring DSM-5-TR and ICD-11 PGD severity and probable caseness. MethodsIn 211 Dutch and 222 German bereaved adults, the: (i) factor structure, (ii) internal consistency, (iii) test-retest reliability, (iv) measurement invariance across subgroups (e.g., differing in language), (v) prevalence of probable caseness, (vi) convergent validity, and (vii) known-groups validity were examined. ResultsConfirmatory factor analyses (CFAs) showed acceptable fit for the unidimensional model for DSM-5-TR and ICD-11 PGD. Omega values indicated good internal consistency. Test-retest reliability was high. Multi-group CFAs demonstrated configural and metric invariance for DSM-5-TR and ICD-11 PGD criteria for all group-comparisons; for some we found support for scalar invariance. Rates of probable caseness for DSM-5-TR PGD were lower than ICD-11 PGD. Optimal agreement in probable caseness was reached when increasing the number of accessory symptoms for ICD-11 PGD from 1+ to 3+. Convergent and known-groups validity was demonstrated for both criteria-sets. LimitationsThe TGI-CA was developed to assess PGD severity and probable caseness. Clinical diagnostic interviews for PGD are needed. ConclusionsThe TGI-CA seems a reliable and valid interview for DSM-5-TR and ICD-11 PGD symptomatology. More research in larger and more diverse samples is needed to further test its psychometric properties.

The ICD-11 and DSM-5-TR prolonged grief criteria: Validation of the Traumatic Grief Inventory-Self Report Plus using exploratory factor analysis and item response theory.

More recently, the prolonged grief disorder (PGD) has been recognized as a mental health disorder following bereavement, which is distinct from depression and PTSD. However, the number and proposed symptom items vary across the ICD-11 and the DSM-5-TR criteria for PG. The Traumatic Grief Inventory-Self Report Plus (TGI-SR+), which is an updated version of the TGI-SR, is currently the only robust instrument that assesses PG according to the ICD-11 and DSM-5-TR criteria. For research and clinical use among French-speaking countries, the forward-backward procedure was applied to translate the TGI-SR+ into French language. Exploratory factor analysis and parallel analysis converged towards a two-dimensional structure for the TGI-SR+, representing adaptation difficulties and traumatic separation distress. However, items mapping onto ICD-11 and DSM-5-TR criteria for PG represented a one-dimensional structure. Findings based on item response theory method provided strong evidence for discriminative characteristics of the items. The internal reliability was excellent for the TGI-SR+ (McDonald's ω = 0.97) and ICD-11 and DSM-5-TR criteria for PGD (McDonald's ω = 0.95). We also demonstrated a very high temporal stability for the TGI-SR+ total score (ICC = .91, p < 0.0001) and ICD-11 PGD and DSM-5-TR PGD (ICC = 0.90, and ICC = 0.88, ps < 0.0001, respectively). The concurrent validity of the instrument was also demonstrated, such that the TGI-SR+ total score and all combinations were positively and significantly associated with the levels of depression, anxiety and post-traumatic stress symptoms. However, the effect sizes were moderate. We conclude that for research and clinical use among French bereaved populations, the TGI-SR+ is a sound tool with very good psychometric properties.

Measuring Grief in the Context of Traumatic Loss: A Systematic Review of Assessment Instruments

Following traumatic loss, defined as the death of a loved one due to unexpected or violent circumstances, adults may experience a myriad of grief-related problems. Given the addition of Prolonged Grief Disorders into the Diagnostic and Statistical Manual for Mental Disorders Fifth Edition, Text-Revision and influx of unexpected deaths due to the global Coronavirus pandemic, there is heightened interest in the measurement of grief-related processes. We conducted a systematic review according to the Preferred Reporting Items for Systematic Reviews and Meta-Analyses guidelines to identify measures of grief used in studies of adults who experienced traumatic loss. Searches yielded 164 studies that used 31 unique measures of grief-related constructs. The most commonly used instrument was the Inventory of Complicated Grief-Revised. Half of the measures assessed constructs beyond diagnosable pathological grief responses. Given the wide variation and adaptations of measures reviewed, we recommend greater testing and uniformity of measurement across the field. Future research is needed to adapt and/or design measures to evaluate new criteria for Prolonged Grief Disorder.

Prevalence, Factor Structure and Correlates of DSM-5-TR Criteria for Prolonged Grief Disorder.

BackgroundProlonged Grief Disorder (PGD) is now included in Section II of the Diagnostic and Statistical Manual of Mental Disorders, 5th Edition, Text Revision (DSM-5-TR). To understand the health burden and then allocate economic and professional resources, it is necessary to provide epidemiological data for this new disorder. This is especially relevant since the new diagnostic criteria differ from its predecessors, which may affect the generalizability of previous findings. More information on the characteristics of people suffering from PGD is also beneficial to better identify individuals at risk. This study, therefore, aimed to estimate the prevalence of the new PGD criteria in a representative population-based sample, evaluate the factor structure, sociodemographic, and loss-related correlates of PGD caseness and explore possible predictors.MethodsOut of a representative sample of the German general population (N = 2,531), n = 1,371 (54.2%) reported to have experienced a significant loss throughout lifetime. Participants provided sociodemographic data and loss-related characteristics. PGD symptoms were measured using items from the German versions of the Prolonged Grief Scale (PG-13) and the Inventory of Complicated Grief (ICG), which could be matched to the DSM-5-TR criteria for PGD.ResultsThe conditional prevalence of PGD was 3.4% (n = 47). The most frequently reported symptoms were intense emotional pain and intense yearning or longing for the deceased. The confirmatory factor analysis confirmed a unidimensional model of PGD. Regression analysis demonstrated that time since the death, the relationship to the deceased, and unpreparedness for the death were significant predictors of PGD.ConclusionAlthough the prevalence of 3.4% using the new diagnostic criteria is lower than the prevalence previously suggested by a meta-analysis, PGD remains a substantial disorder in the general population. In particular, the loss of a partner or child increases the risk for PGD, as does unpreparedness for the death of a loved one. Clinicians should pay particular attention to these high-risk groups. Further clinical implications are discussed.

Network analysis of PGD, PTSD and insomnia symptoms in Chinese shidu parents with PGD

ABSTRACT Background Chinese shidu parents (bereaved parents over the age of 49 who have lost their only child) are potentially at a high risk of prolonged grief disorder (PGD), posttraumatic stress disorder (PTSD) and insomnia. Objective The current study aimed to estimate three network models in 310 shidu parents who met the ICD-11 criteria for PGD: (1) a PGD network to identify central symptoms; (2) a comorbidity network to explore bridge symptoms between PGD and PTSD; (3) a comorbidity network to examine the associations between PGD and insomnia symptoms. Methods The R-packages bootnet, qgraph and networktools were used to investigate the structure of network models and centrality indices of symptoms. In addition, robustness and significance analyses for the edge weights and the order of centrality were performed. Results Emotional pain and numbness emerged as the most central symptoms in the PGD network. In the PGD-PTSD comorbidity network, the highest bridge strength symptoms were inability to trust others (PGD) and feeling upset (PTSD). Inability to trust others (PGD), avoidance (PGD), and impairment of life quality (insomnia) were possible bridge symptoms connecting PGD and insomnia. Conclusions Reducing emotional pain and numbness may be a viable target in PGD interventions for shidu parents. Additionally, findings suggest that future studies could examine the role of inability to trust others and avoidance in PGD comorbidities. HIGHLIGHTS • Emotional pain and numbness were the most influential symptoms in shidu parents with PGD. The role of PGD symptoms of inability to trust others and avoidance in the comorbidities of PGD with PTSD and insomnia might be worthy of further study

Updated DSM-5 Text Revisions to Be Released in March

Updated <i>DSM-5</i> Text Revisions to Be Released in March

Bereavement behind bars: Grief support groups with and without therapy dogs for incarcerated females

Grief is a universal experience; however not everyone experiences grief and loss in the same way. People who are incarcerated are often informed of losses via phone, are unable to attend funeral services or participate in supportive rituals, and can have difficulty expressing feelings in a place where showing emotion can be dangerous. Being unable to obtain support and process grief and loss may contribute to impaired functioning. In this study of bereavement support for women in prison, incarcerated women with recent or unresolved losses (n=32) were randomly assigned to grief support groups with therapy dogs (animal-assisted, AA) or without therapy dogs (non-AA). Pre- and post-test measures of bereavement symptoms and prolonged grief disorder (PGD) were obtained. This study shows that AA groups had more significant decreases in symptoms, lower rates of post-group diagnostic criteria for PGD and higher rates of perceived support/benefit from the groups.

Widowed Young: The Role of Stressors and Protective Factors for Resilience in Coping with Spousal Loss.

While distressing, late life spousal loss is considered a normative life event and most demonstrate resilient recovery from grief. However, for 5-7% of the population spousal loss comes early, before the age of 50, and little is known about the factors that influence adjustment in this population. We used the DPM integrative framework to examine correlates and predictors of mental wellbeing and grief intensity in an international sample of 603 young widows and widowers. Contrary to existing bereavement research, loss-orientated stressors (e.g., expectedness and cause of death) did not predict bereavement outcomes. Employment and financial wellbeing were the only statistically significant restoration-orientated stressors associated with coping, mental wellbeing and grief intensity. We found no significant associations between parental status and coping or bereavement outcomes. Loss-orientated coping, followed by inter and intrapersonal protective factors for resilience and financial wellbeing were the greatest predictors of grief intensity. Loss-orientated coping was highest in early bereavement, the greatest predictor of grief intensity and associated with being unemployed, financial insecurity and decreased protective factors for resilience. Restoration-orientated coping was highest in later bereavement, was a weak predictor of grief intensity and associated with being employed, increased financial wellbeing and protective factors for resilience. Overall, we found the young-widowed population is at heightened risk of poor adjustment. Almost two-thirds reported decreased functioning, probable depression with high rates of psychological distress. Nearly half met diagnostic criteria for prolonged grief disorder. We discuss implications for research and clinical practice.

Parenting through grief: A cross-sectional study of recently bereaved adults with minor children

Background: Grieving adults raising parentally-bereaved minor children experience persistently elevated symptoms of depression and grief. However, the factors associated with their mental health outcomes are not well understood. Aim: To investigate the psychosocial and demographic characteristics associated with grief distress and depressive symptom severity in bereaved adults with minor children. Design: Cross-sectional, web-based survey. Setting/participants: Eight hundred forty-five bereaved adults raising minor (age <18 years) children who had experienced the death of a co-parent. Primary outcomes were grief distress (Prolonged Grief Disorder-13), depressive symptoms (Patient-Reported Outcomes Measurement Information System-Depression), and widowed parenting self-efficacy (WPSES). Results: Mean grief scores were 33.5; mean depression scores were 58.3. Among the 690 individuals more than 6 months bereaved, 132 (19.3%) met criteria for prolonged grief disorder. In adjusted models, participants reporting higher grief scores were more recently bereaved, identified as mothers, non-Caucasian, had lower education and income, and had not anticipated their co-parent’s death. The statistical modeling results for depression scores were similar to grief scores except that depression was not associated with anticipation of co-parent death. Parents reporting lower WPSES scores had higher grief and depression scores. Retrospective assessments of more intense parenting worries at the time of co-parent death were also associated with higher grief and depression scores. Conclusions: For bereaved adults with minor children, unanticipated co-parent death was linked with higher grief distress but not symptoms of depression. Addressing parenting concerns may represent a common pathway for improving the mental health of parentally-bereaved families.

Grief-related beliefs in shidu parents with and without prolonged grief disorder: Psychometric properties of a Chinese version of the Typical Beliefs Questionnaire.

The Typical Beliefs Questionnaire (TBQ) assesses common grief-related cognitions, which demonstrated satisfactory psychometric properties in a treatment-seeking sample with prolonged grief disorder (PGD). Chinese shidu parents (bereaved parents over the age of 49 who have lost their only child) are at a high risk of PGD. The current study aimed to examine psychometric properties of the Chinese version of the TBQ (TBQ-C) in a community sample of shidu parents with and without PGD, to compare this to the original validation clinical sample in the United States bereaved of any close relationship and to consider its use as a clinical tool. We examined the rate of positive endorsement, factor structure, internal consistency and validity of the TBQ-C in 310 community-based shidu parents (including 102 who met the criteria for PGD). Results showed that the rate of positive endorsement for each item ranged from 7.2% to 48.6% among non-PGD participants and from 20.6% to 92.2% among PGD participants. Confirmatory factor analysis indicated that the original five-factor structure fit both the non-PGD and PGD shidu parents. The TBQ-C showed acceptable internal consistency and satisfactory convergent and concurrent validity in both groups. It had good discriminant validity and can be helpful in distinguishing shidu parents with and without PGD. The TBQ-C can be used to investigate common grief-related beliefs that may be problematic for both shidu parents with and without PGD.

Prolonged Grief and Bereavement Supports Within a Caregiver Population Who Transition Through a Palliative Care Program in British Columbia, Canada.

Objective:To determine the prevalence of prolonged grief disorder (PGD), and self-reported resilience among bereaved caregivers within a palliative care program that serves a large region of the Lower Mainland in British Columbia, Canada. Additionally, to discern effective bereavement supports utilized by caregivers following the loss of a loved one.Methods:A descriptive study using both quantitative and qualitative methods. Sociodemographic information (n = 427) was collected from bereaved caregivers 3 months after their loss. PGD and resilience were prospectively assessed 12 months post-loss using the prolonged grief scale (PG-13, n = 212) and brief resilience scale (BRS, n = 215), respectively. A qualitative thematic analysis was conducted on responses to the open-ended question on what bereavement services or activities caregivers found helpful in coping with the loss of a loved one.Results:Of the 212 individuals that completed the PG-13, 4.7% met diagnostic criteria for PGD, 27.4% were moderate risk, and 67.9% were low risk for PGD. Of the 215 caregivers that completed the BRS, 48.4% had low resilience, 51.6% had normal resilience, and 0% had high resilience. The major themes of formal supports, informal supports, and self-care activities emerged from caregiver comments regarding effective bereavement supports.Conclusion:The incidence of PGD in caregivers is low within the Fraser Health Palliative Care program. Bereaved caregivers mainly utilize existing social networks and activities to cope with their loss. Focusing on a community-based approach to supports may improve bereavement experiences and lower rates of prolonged grief.

Prolonged grief disorder in DSM-5-TR: Early predictors and longitudinal measurement invariance.

Objective:The Diagnostic and Statistical Manual of Mental Disorders, 5th Edition, Text Revision includes prolonged grief disorder as a novel disorder. Prolonged grief disorder can be diagnosed when acute grief stays distressing and disabling, beyond 12 months following bereavement. Evidence indicates that elevated prolonged grief disorder symptoms in the first year of bereavement predict pervasive grief later in time; targeting early elevated grief may potentially prevent symptoms getting chronic. There is limited knowledge about the characteristics of people in the first year of bereavement who have an elevated chance of developing full prolonged grief disorder beyond the 12-month time point. This study examined these characteristics.Methods:We used self-reported data from 306 adults who all completed questions on socio-demographic and loss-related characteristics plus a measure of prolonged grief disorder within the first year of bereavement (Wave 1; time since loss: M = 4.97, SD = 3.13 months) and again 1 year later (Wave 2; time since loss: M = 17.84, SD = 3.38 months). We examined the prevalence rates of probable prolonged grief disorder (Wave 2), measurement invariance of prolonged grief disorder symptoms between waves, and associations of socio-demographic and loss-related variables, and Wave 1 prolonged grief disorder with probable prolonged grief disorder at Wave 2.Results:Regarding prevalence, 10.1% (n = 31) met criteria for probable prolonged grief disorder (Wave 2). Multigroup confirmatory factor analysis supported longitudinal measurement invariance of prolonged grief disorder symptoms. People meeting criteria at Wave 1 (except the time criterion) had a significantly increased risk of meeting criteria at Wave 2. Variables best predicting probable prolonged grief disorder at Wave 2 were prolonged grief disorder at Wave 1, lower education, loss of a child and loss to unnatural/violent causes (sensitivity = 56.67%, specificity = 98.12%, 93.92% correct classifications).Conclusion:People meeting criteria for prolonged grief disorder (except the time criterion) before the first anniversary of the death are at risk of full-blown prolonged grief disorder beyond this time point, particularly those who have lower education, confronted the death of a child and confronted unnatural/violent loss. Findings may inform advances in preventive bereavement care.