Evaluation of the factor structure, prevalence, and validity of disturbed grief in DSM-5 and ICD-11.

Persistent complex bereavement disorder (PCBD) is a disorder of grief included in DSM-5 Section 3. Prolonged Grief Disorder (PGD) is a disorder of grief that will enter the forthcoming ICD-11. This study evaluated the factor structure, prevalence, and validity of disturbed grief as per DSM-5 and ICD-11. With data from a community sample (N =512), we used confirmatory factor analysis (CFA) to evaluate the fit of different factor models for PCBD and PGD, determined diagnostic rates for probable PCBD and PGD, and used sensitivity/specificity analyses to evaluate the performance of individual items as indicators of PCBD and PGD. We calculated associations of PCBD-caseness and PGD-caseness with concurrently assessed symptoms of posttraumatic stress disorder (PTSD) and depression and, in a subset of 280 participants, with these same symptoms assessed one year later, to examine concurrent and predictive validity of PCBD and PGD. For PCBD-symptoms, a three-factor model with distinct factors of separation distress, reactive distress, and social/identity disruption fit the data well; for PGD-symptoms a two-factor model with distinct separation distress symptoms and additional symptom (e.g., guilt, anger, blame) yielded acceptable model fit. Overall, items evidenced strong sensitivity and negative predictive power, and relatively poor specificity and positive predictive power. The prevalence of probable DSM-5 PCBD (6.4%) was significantly lower than the prevalence of ICD-11 PGD (18.0%). Both PCBD and PGD were significantly associated with concurrent overall grief, depression, and PTSD; PCBD but not PGD was associated with symptoms one year beyond baseline. Limitations include our reliance on self-reported data and symptoms of PCBD and PGD being derived from two questionnaires. Findings provide preliminary evidence for the validity of both the PCBD and PGD constructs, albeit that prevalence rates of both constructs and predictive validity differ-which needs further scrutiny.

Boelen PA ，Lenferink LIM ，Nickerson A ，Smid GE ... -  《-》

Comparison of DSM-5 criteria for persistent complex bereavement disorder and ICD-11 criteria for prolonged grief disorder in help-seeking bereaved children.

Persistent complex bereavement disorder (PCBD) is a disorder of grief that newly entered DSM-5. Prolonged grief disorder (PGD) is a disorder of grief included in ICD-11. No prior studies examined and compared the dimensionality, prevalence, and concurrent validity of both conditions among bereaved children. With data from 291 help-seeking bereaved 8-18 year old children, we used confirmatory factor analysis to evaluate the fit of different factor models for PCBD and PGD. In addition, we determined diagnostic rates for probable PCBD and PGD and calculated associations of PCBD and PGD caseness with concurrently assessed symptoms of overall disturbed grief, depression, posttraumatic stress, and parent-rated problem behavior. For PCBD and PGD, one-factor models-with all symptoms forming a unidimensional factor of disturbed grief-fit the data best. The prevalence of probable DSM-5 PCBD (3.4%) was significantly lower than ICD-11 PGD (12.4%). Both PCBD and PGD were significantly associated with concurrently assessed overall disturbed grief, depression, and posttraumatic stress; associations with parent-rated problems were moderate. Findings were based on self-reported ratings of symptoms, obtained from three different scales not specifically designed to assess PCBD and PGD. The use of a help-seeking sample limits the generalization of findings to bereaved children generally. Findings support the validity of DSM-5 PCBD and ICD-11 PGD. Prevalence rates of both constructs differ. This needs further scrutiny.

Boelen PA ，Spuij M ，Lenferink LIM 《-》

Further evaluation of the factor structure, prevalence, and concurrent validity of DSM-5 criteria for Persistent Complex Bereavement Disorder and ICD-11 criteria for Prolonged Grief Disorder.

Persistent complex bereavement disorder (PCBD) is a disorder of grief included in DSM-5. Prolonged grief disorder (PGD) is included in ICD-11. Few studies have evaluated and compared criteria sets for DSM-5 PCBD and ICD-11 PGD. The current study explored and compared the dimensionality, prevalence rates, diagnostic agreement, concurrent validity, and socio-demographic and loss-related correlates of both criteria sets. Self-reported data were available from 551 bereaved individuals. Confirmatory factor analysis showed that for DSM-5 PCBD-symptoms, a three-factor model with distinct but correlated factors fit the data well; for ICD-11 PGD-symptoms a one-factor model yielded adequate fit. The prevalence of probable DSM-5 PCBD (8.2%) was significantly lower than ICD-11 PGD (19.2%). Both DSM-5 PCBD and ICD-11 PGD were significantly associated with concurrent overall grief and depression, and varied as a function of education and time since loss. ICD-11 PGD prevalence rates went down and agreement with PCBD-caseness went up, when heightening the number of symptoms required for an ICD-11 PGD diagnosis. This study was limited by its reliance on self-reported data and grief symptoms were derived from two scales. That notwithstanding, findings provide further evidence that differences exist between disturbed grief criteria in DSM-5 and ICD-11 that may negatively impact research and care.

Boelen PA ，Lenferink LIM ，Smid GE 《-》

Valid measurement of DSM-5 persistent complex bereavement disorder and DSM-5-TR and ICD-11 prolonged grief disorder: The Traumatic Grief Inventory-Self Report Plus (TGI-SR+).

When grief reactions after bereavement are so intense that they impair daily functioning, a diagnosis of disturbed grief may apply. Slightly differing criteria-sets for disturbed grief are included in the ICD-11, the DSM-5, and its forthcoming text revision, DSM-5-TR. We examined psychometric properties of a new self-report measure, the 22-item Traumatic Grief Inventory-Self Report Plus (TGI-SR+), that assesses these criteria sets for Persistent Complex Bereavement Disorder (PCBD) as per DSM-5, and Prolonged Grief Disorder (PGD) as defined in ICD-11 and DSM-5-TR. We examined the: i) factor structure, ii) internal consistency, iii) temporal stability, iv) convergent validity, v) known-groups validity, vi) probable caseness, and vii) optimal clinical cut-off scores in two Dutch bereaved samples. Sample 1 consisted of 278 adults, bereaved by various causes. Sample 2 included 270 adults who lost loved ones in a traffic accident. We found support for a 3-factor PCBD model, 1-factor DSM-5-TR model, and 1-factor ICD-11 PGD model. The DSM-5 PCBD, DSM-5-TR PGD, and ICD-11 PGD items demonstrated good internal consistency and temporal stability. Associations between disturbed grief symptoms and posttraumatic stress and depression levels supported convergent validity. Associations between demographic/loss-related variables and disturbed grief symptoms supported known-groups validity. Optimal clinical cut-offs for the TGI-SR+ total score were ≥ 75, ≥71, and ≥ 75 for probable caseness of DSM-5 PCBD, DSM-5-TR PGD, and ICD-11 PGD, respectively. While replication of our findings in diverse bereaved samples is needed, we conclude that the TGI-SR+ is a reliable and valid measure to assess symptoms of DSM-5 PCBD, DSM-5-TR PGD, and ICD-11 PGD.

Lenferink LIM ，Eisma MC ，Smid GE ，de Keijser J ，Boelen PA ... -  《-》

When does grief become pathological? Evaluation of the ICD-11 diagnostic proposal for prolonged grief in a treatment-seeking sample.

Background: Prolonged grief disorder (PGD) will be newly included in the ICD-11, while a clinically similar diagnosis, persistent complex bereavement disorder (PCBD), has already been added to the DSM-5. Only few studies have evaluated these criteria-sets for prolonged grief. Objective: The aim of this study was to evaluate the ICD-11 accessory symptom threshold and compare the diagnostic performance of the two criteria-sets in treatment-seeking bereaved persons. Method: 113 grief treatment-seeking bereaved persons completed the Interview for Prolonged Grief-13. We used receiver operator characteristic analysis to determine an optimum ICD-11 accessory symptom threshold. We calculated diagnostic rates for PGD and PCBD and examined associations of PGD and PCBD caseness with concurrently assessed psychopathology and prolonged grief symptoms assessed one month later. Results: An ICD-11 threshold of six accessory symptoms distinguished optimally between interview-diagnosed participants with and without prolonged grief. The prevalence of PGD (69%) was significantly higher than that of PCBD (48%) and of PGD with a 6-symptom threshold (47%). PGD caseness was associated with the relation to the deceased, 6-symptom threshold PGD and PCBD caseness with the time since loss. All criteria-sets were linked to concurrent prolonged grief, depression, and general mental distress. PCBD and 6-symptom threshold PGD but not PGD were associated with prolonged grief severity one month later. Conclusions: The results support the validity of PGD and PCBD but, at the same time, they provide further support for differing prevalence rates. Using an empirically determined ICD-11 accessory symptom threshold could prevent the pathologisation of grief reactions.

Comtesse H ，Vogel A ，Kersting A ，Rief W ，Steil R ，Rosner R ... -  《-》