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MINI REVIEW article

Front. Psychiatry, 30 November 2023
Sec. Personality Disorders
This article is part of the Research Topic Reviews in Psychiatry 2023: Personality Disorders View all 8 articles

Convergence between the dimensional PD models of ICD-11 and DSM-5: a meta-analytic approach

Updated
Luis Hualparuca-Olivera
Luis Hualparuca-Olivera1*Toms Caycho-RodríguezTomás Caycho-Rodríguez2Julio ToralesJulio Torales3Dayana Ramos-CamposDayana Ramos-Campos4
  • 1Escuela de Psicología, Universidad Continental, Huancayo, Peru
  • 2Facultad de Psicología, Universidad Científica del Sur, Lima, Peru
  • 3Department of Medical Psychology, School of Medical Sciences, Universidad Nacional de Asunción, San Lorenzo, Paraguay
  • 4Department of Research, Psychological Science, Uncanny, Huancayo, Peru

In the current diagnostic systems, the International Classification of Diseases-11th rev. (ICD-11) and the Diagnostic and Statistical Manual of Mental Disorders-5th ed. (DSM-5), the evaluation and diagnosis of personality disorder (PD) aim at dimensional examination of the severity of its dysfunction and the stylistic features that accompany it. Since their implementation, or even before, several measures have been developed to assess PD severity and traits in both models. Thus, convergent validity metrics have been reported with various PD measures; however, the convergence of the same constructs included in the measures of these two models remains undefined. The objective of the present review was to examine whether there is a sufficient relationship between PD measures of the ICD-11 and DSM-5 AMPD in the general population. For this meta-analytic review, systematic searches were conducted in Web of Science, PubMed, Scopus, and Google Scholar. We included studies that reported Pearson’s r correlations without restrictions on language, age, sex, setting, type of sample, or informant of the measures. We excluded associations with anankastia, psychoticism or the borderline pattern because they were not comparable between one dimensional model and the other. We examined the quality of the evidence with the JBI Critical Appraisal Checklist for Analytical Cross Sectional Studies, and performed the random effects meta-analysis with the ‘meta’ package of the RStudio software. Of the 5,629 results returned by the search, 16 studies were eligible; and showed moderate quality. The risk of bias was manifested by not specifying the details of the sample, the recruitment environment, and the identification and control of confounding factors. Thirteen studies provided two or more correlations resulting in a total of 54 studies for meta-analysis. The overall effect size estimate (correlation) was moderate for the overall model (r = 0.62, 95% CI [0.57, 0.67], p < 0.0001, I2 = 97.6%). For the subgroup of associations, ICD-11 severity model and DSM-5 AMPD severity model, the correlation was also moderate (k = 10, r = 0.57, 95% CI [0.48; 0.66]; I2 = 92.9%); as for the subgroup of associations, ICD-11 traits model and DSM-5 AMPD traits model (k = 44, r = 0.63, 95% CI [0.57; 0.69], I2 = 97.9%). The convergent validity between measures of PD severity and traits between one diagnostic system and another has been demonstrated in this review and they can probably be used interchangeably because they also measure the same constructs. Future research can address the limitations of this study and review the evidence for the discriminant validity of these measures.

1 Introduction

Personality involves the way a person behaves, interprets themselves, perceives life, other people and situations; while PD is a marked alteration in personal and social functioning (1). The construct of personality and its pathology has always attracted the interest of mental health professionals because it is linked to other conditions or clinically relevant results. In the last 10 years, or even more, personality disorder has been conceived in a dimensional way in the most used diagnostic systems to improve their validity and clinical usefulness (2). In both diagnostic systems for the dimensional diagnosis of PD, two similar steps are followed: identification of the level of severity of PD dysfunction and assignment of the accompanying stylistic features (1, 3). Both steps reflect the most influential paradigms in personality psychopathology. Thus severity reflects the current state of basic internal capabilities; and trait domains, the stylistic dispositions with which severity probably interacts bidirectionally (4, 5). Supplementary Table S1 shows the conceptually equivalent constructs between the ICD-11 and DSM-5 models for personality disorder.

In the DSM-5 AMPD, the PD severity model is criterion A and is defined as a unidimensional spectrum of problems in the components of identity and self-direction for the self-dysfunction domain, and of problems in empathy and intimacy for the interpersonal dysfunction domain. In the ICD-11, the first diagnostic step is the severity of intra- and interpersonal functioning, similar to that of the other model; however, guidelines for manifestations (cognitive, emotional and behavioral) and deterioration (personal and social) are added (6). Small differences are also observed at the subcomponent level.1 For example, in the self-direction component of the DSM-5 AMPD, two additional subcomponents are evident compared to those already described in the ICD-11 severity model: (i) the use of constructive and prosocial internal norms of behavior and (ii) the capacity for productive self-reflection. Likewise, in the empathy component of the DSM-5 AMPD, two additional subcomponents to what is mentioned in the ICD-11 are also noted: (a) tolerance of different perspectives and (b) understanding of the effects of one’s own behavior on others. Finally, regarding intimacy, the ICD-11 severity model emphasizes the ability to manage conflicts in relationships; while in the DSM-5 AMPD there is no explicit description for it (7). On the other hand, there are differences in the terms of thresholds between the two severity models. In the ICD-11, severity ranges from: none (implicit), personality difficulty, mild PD, moderate PD, and severe PD; while PD severity in DSM-5 AMPD expands from: no impairment, some impairment, moderate impairment, severe impairment, and extreme impairment; respectively.

In the DSM-5 AMPD trait model (Criterion B) there are five trait domains: negative affectivity, detachment, disinhibition, antagonism, and psychoticism. The latter does not correspond to any trait in the ICD-11 PD trait model. The ICD-11 PD traits model includes negative affectivity, detachment, disinhibition, dissociality, and anankastia.2 The antagonism of the DSM-5 AMPD traits model is similar to the dissociality of the ICD-11 PD traits model; and the anankastia of this last model does not have an explicit domain in the DSM-5 AMPD traits model. Although several authors have suggested that the anankastia is the inverse of the disinhibition domain, certainly other studies have found it to be an independent domain (7, 8). Furthermore, in bipolarity it is difficult, if not impossible, to qualify the absence or very low levels of the trait. At the facet level, greater differences are evident between the two models.3 This may be because, for example, in the DSM-5 AMPD traits model, several facets are interstitial and/or are located in the incorrect domain (9). We mention only the facets belonging to four of the five domains because they are comparable between the models as stated above.

The negative affectivity of the DSM-5 AMPD traits model mainly includes: emotional lability, anxiety, insecurity due to separation; on the other hand, its counterpart in the ICD-11 PD traits model includes: anxiety, worry, depression, vulnerability, fear, anger, hostility, guilt, shame, intra and interpersonal pessimism, emotional lability and dysregulation, low self-esteem and self-distrust (including avoidance, dependence, envy, and worthlessness), and interpersonal mistrust. Likewise, the detachment of the DSM-5 AMPD traits model mainly includes withdrawal, avoidance of intimacy, and anhedonia; while its counterpart in the ICD-11 PD traits model includes only social detachment and emotional detachment. Similarly, the DSM-5 AMPD antagonism traits model mainly includes manipulation, deception, and grandiosity; while dissociality in the ICD-11 PD traits model includes egocentrism and lack of empathy. Finally, the disinhibition of the DSM-5 AMPD traits model mainly includes irresponsibility, impulsivity and distractibility; while its counterpart in the ICD-11 PD traits model includes impulsivity, distractibility, irresponsibility, recklessness and lack of planning.

Previous studies have described instruments to evaluate both severity and traits in both models (2, 4, 8, 1012). These measures include the Personality Inventory for DSM-5-Brief Form-Plus (PID-5-BF+) and the Personality Inventory for DSM-5-Brief Form-Plus Modified (PID-5-BF + M), which are compatible with both trait models by integrating the psychoticism and anankastia domains. We consider these instruments only within the DSM-5 AMPD traits model because they are based on items from the Personality Inventory for DSM-5 (PID-5). Demonstrations of convergent validity —significant and substantial associations between various measures developed to measure a common construct— are a basic and minimum requirement for the validity of any psychological test (13). Several authors agree that PD severity and the trait domains of negative affectivity, detachment, dissociality/antagonism, and disinhibition in both models are conceptually equivalent (1417); this, despite the subtle differences described in this article. As a result, measures from one model were used to report results from the other model (1820). This is further evidence that in psychological measurement this metric is often assumed rather than directly demonstrated (13). To overcome this knowledge-practice gap, it is necessary to empirically and deeply explore the significance and the strength of association between the constructs of one model and the other.

2 The present review

The aim of this systematic review was to explore the convergence between measured constructs of AMPD and ICD-11 personality disorders severity and trait domains —except for the associations with anankastia, psychoticism or the borderline pattern because they are not comparable between one dimensional model and the other—. We excluded studies of convergent validity between severity and trait measures between both models because this does not have major implications in clinical practice. We also excluded associations with sub-constructs (domains/components/sub-components of severity or trait facets) because the internal structure at these sub-dimensional levels is still debated (9, 2124). Thus, we systematically searched the literature (in any language) using four databases: Web of Science, PubMed, Scopus, and Google Scholar. Similar to a previous paper (2), we used the following keywords: ((personality) AND ((disorder*) OR (patholog*))) AND (dimension*) AND ((function*) OR (severi*)) AND ((trait*) OR (domai*)) AND ((validity) OR (assessment)) AND ((ICD) OR (International Classification of Diseases)) AND ((DSM-5) OR (Diagnostic and Statistical Manual of Mental Disorders)). For this review, the Preferred Reporting Items for Systematic reviews and Meta-Analyses [PRISMA; (25, 26)] guidelines were followed.

The search returned 5,629 results (44 from Web of Science, 30 from PubMed, 5,518 from Scopus, and 37 from Google Scholar). There were no restrictions regarding the sex, age of the participants, the type of sample used or type of informant of the measures; since we assumed that the literature collected could be austere. Only studies that presented Pearson’s correlation coefficients for the severity and trait scales of both models were included. We contacted the authors of the studies to obtain the full text of the articles when they had restricted access. The quality of evidence of the included studies was assessed using the JBI Critical Appraisal Checklist for Analytical Cross Sectional Studies (27, 28); and synthesis, with the ‘Meta’ package v. RStudio software 6.5-0-2023.09.0–463. We used only six of the eight questions in the risk of bias tool because the questions ‘Was the exposure measured in a valid and reliable manner?’ and ‘Were objective, standard criteria used to measure the condition?’ explicitly qualified etiological and risk studies.

3 Results

3.1 Description of the chosen studies

Table 1 shows the 19 studies included and covers the results on this issue in the last 6 years. In these investigations, the measures that evaluate severity from the ICD-11 PD model included: the ICD-11 Personality Disorder Severity Scale (PDS-ICD-11), its version clinician rating form (PDS-ICD-11-CRF), and the ICD-11 PD Severity Clinician Rating Form. Likewise, the instruments that measure severity from the DSM-5 AMPD model include: the Level of Personality Functioning Scale–Brief Form (LPFS-BF), its second version (LPFS-BF 2.0), its informant version (LPFS-BF 2.0-I), and the Semi-Structured Interview for Personality Functioning DSM-5 (STiP 5.1). On the other hand, the measures that examine the trait domains from the ICD-11 PD model include: four scales from the PiCD, the ICD-11 PD Traits Clinician Rating Form and the PAQ-11. Similarly, the instruments that measure the trait domains from the DSM-5 AMPD model involved: four scales of the PID-5, its short form (PID-5-SF), its brief form plus (PID- 5-BF+), its informant brief form plus (I-PID-5-BF+), and the LPFS-SR-FFM Trait Coded (LPFS-SR-FFM-TC). Supplementary Table S2 describes the scales measuring personality disorder severity and trait domains from the studies analyzed.

TABLE 1
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Table 1. Description of included studies.

The included studies used samples from seven countries (one non-Western society) with instruments developed/adapted in six languages: Danish, English, German, Korean, Polish, and Spanish. These instruments consisted of clinician-administered interviews, and self-report and informant-report questionnaires. Four studies used clinical samples of adults (3032, 38), eight studies used community samples of adults (29, 36, 37, 3941, 43, 44), and four studies used mixed samples (clinical and community-based) of adults (3335, 42). The recruitment settings were: community mental health treatment units, psychiatric hospitals, a psychiatric outpatient clinic, and a women’s college. The total sample of 16 studies involved 11,085 participants; with an average of 62.5% women, and an average age of 35.8 years. The range of the correlation coefficients r was from 0.31 to 0.74 between the severity measures of both models; and r from 0.26 to 0.89, between the trait scales of both models.

3.2 Quality and synthesis of studies

Overall, the quality of the included studies was considered moderate. No studies have reported the risk of bias in more than three domains of the JBI Critical Appraisal Checklist for Analytical Cross Sectional Studies (see Supplementary Figure S1). Indeed, bias was found in 81.3% of the studies in the domains of ‘Confounding Identification’ and ‘Confounding Management’. Likewise, 25% of studies presented a risk of bias in the ‘Sample and Setting’ domain. There was no risk of bias (0%) in the domains ‘Eligibility Criteria’, ‘Measurement’, or ‘Statistics’. Four studies presented bias in ‘Sample and Setting’ (39, 40, 43, 44), as they did not adequately report demographic data, location or time period. Thirteen studies presented risk of bias in the ‘Confounding Identification’ and ‘Confounding Management’ domains (3035, 3740, 4244), as baseline characteristics or prognostic factors of the results were not identified; nor were strategies such as matching or stratification used to address these confounders. Although three studies provided only one metric of interest for this study (29, 33, 36), the remainder provided two or more association coefficients that were useful for this investigation. Consequently, 54 studies in total were included in this meta-analysis. Figure 1 shows the forest plot of the studies that were meta-analyzed using the random effects method. Two subgroups are shown: the associations between the ICD-11 severity model and the DSM-5 AMPD severity model, and the associations between the ICD-11 traits model and the DSM-5 AMPD traits model.

FIGURE 1
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Figure 1. Forest plot of the reviewed studies.

A strong and significant degree of heterogeneity was observed in the general model (k = 54). That is, τ2 = 0.04, 95% CI [0.02; 0.05], which denotes a significant variance in true effects between studies (45, 46). The I2 statistic, which describes the proportion of the true variance found (46), also showed a considerable level of heterogeneity (I2 = 97.6, 95% CI [97.3%; 97.9%]). Cochrane’s Q also showed a significant level of heterogeneity (χ2 = 2226.80 (53), p = 0). The group estimator of the effect size—i.e., the summary coefficient of association—of the general model was significantly moderate (r = 0.62, 95% CI [0.57, 0.67], p < 0.0001). A significant degree of publication bias was also found using Egger’s regression test (t = −6.27 (52), p < 0.0001; see the funnel plot in Supplementary Figure S2). For the subgroup of associations between the ICD-11 severity model and DSM-5 AMPD severity model (k = 10), significant levels of heterogeneity were also found τ2 = 0.02, I2 = 92.9%, χ2 = 126.15. The estimated coefficient of this subgroup was significantly moderate (r = 0.57, 95% CI [0.48, 0.66]). In the subgroup of associations between the ICD-11 traits model and the DSM-5 AMPD traits model (k = 44), significant levels of heterogeneity were found τ2 = 0.04, I2 = 97.9%, χ2 = 2019.80. The estimated coefficient for this subgroup was also significantly moderate (r = 0.63, 95% CI [0.57, 0.69]). Finally, there was no significant difference between the associations found in these two subgroups (χ2 = 1.25 (1), p = 0.26). However, there is evidence that sample type and language moderated the overall effect size (χ2 = 50.7 (2), p < 0.0001 and χ2 = 14.27 (5), p = 0.01; respectively).

We also performed further analyzes of each of the trait domains as subgroups (see Supplementary Figure S3). For the subgroup of Negative Affectivity associations between the ICD-11 model and the DSM −5, a significant level of heterogeneity was found τ2 = 0.03, I2 = 95.2%, χ2 = 206.22. The coefficient estimate for this subgroup was significantly high (r = 0.71, 95% CI [0.61, 0.81]). Likewise, for the subgroup of Detachment associations between the ICD-11 model and the DSM −5, a significant level of heterogeneity was found τ2 = 0.04, I2 = 97.7%, χ2 = 432.20. The coefficient estimate for this subgroup was significantly moderate (r = 0.59, 95% CI [0.48, 0.71]). Similarly, for the subgroup of Dissociality/Antagonism associations between the ICD-11 model and the DSM-5, a significant level of heterogeneity was found τ2 = 0.06, I2 = 98.4%, χ2 = 636.14. The coefficient estimate for this subgroup was significantly moderate (r = 0.55, 95% CI [0.41, 0.70]). Also, for the subgroup of Disinhibition associations between the ICD-11 model and the DSM-5, a significant level of heterogeneity was found τ2 = 0.02, I2 = 97.1%, χ2 = 349.06. The coefficient estimate for this subgroup was significantly moderate (r = 0.68, 95% CI [0.58, 0.77]). Finally, there was no significant difference in these four subgroups (χ2 = 4.23 (3), p = 0.24).

4 Discussion

To our knowledge, this review is the first study to meta-analytically examine the convergence between the measures that evaluate PD from the new dimensional models of the two most used diagnostic standards in the world, the ICD-11 and the DSM-5 AMPD. In general, our findings indicate moderate convergence between these instruments, both for the severity and trait models. Although a high summary association would be more satisfactory —given that these instruments conceptually measure the same constructs— the results may already indicate empirical evidence for the interchangeable usefulness of these measures between one model and another. Publication bias can occur for various reasons, including heterogeneity in the methodology of studies in the meta-analysis (45), as presented here. Our results align with those described in more extensive non-meta-analytic reviews that included the convergent validity of the LPFS, and its derivatives, with other self-reported measures of PD severity (4, 24, 47). Likewise, our findings are similar to those of reviews that reported adequate levels of convergent validity between PID-5, and its derivatives, with other measures of maladaptive traits (8, 47, 48). The literature described in these reviews of the DSM-5 AMPD model instruments in relation to the ICD-11 PD model measures was extremely scarce and an update of the evidence was necessary.

The main strength of this research was the inclusion of gray literature [(e.g., 31, 38)], and texts of articles in languages other than English [(e.g., 35)]. However, this study has several limitations to declare. Regarding the evidence included in this review, most studies used small samples and the methodology was predominantly based on self-report questionnaires instead of using multimethod designs. Previous studies have already warned about these practices that limit the adequate interpretation of evidence (23, 49). Our study quality assessment tool is the most used by researchers because it is brief (50); however, for the same reason it may not adequately address all the shortcomings of the studies. Another limitation of the included studies was the majority use of community samples, in which the few vulnerabilities associated with PD may not reflect the exact relationship metrics that interest us. Regarding the limitations of the review processes used, we were unable to access relevant data from two studies (51, 52) because of the lack of response from the authors or the failure to understand our requirement. Likewise, we could not perform moderator analyses because the number of studies with the same measure or another possible moderator was insufficient. However, we assert that none of these methodological limitations would change the general inferences of this review. Future research could address these limitations or conduct discriminant validity analyses to complete evidence of the construct validity of the measures of one or another dimensional model of PD.

Author contributions

LH-O: Conceptualization, Writing – original draft. TC-R: Methodology, Supervision, Writing – review & editing. JT: Conceptualization, Supervision, Validation, Writing – review & editing. DR-C: Conceptualization, Formal analysis, Methodology, Writing – original draft.

Funding

The author(s) declare that no financial support was received for the research, authorship, and/or publication of this article. The subsidy for the processing payment of this article was covered by Continental University (Company name: Universidad Continental S.A.C.; RUC: 20319363221; Address: Av. San Carlos No. 1980, Huancayo, Peru) once accepted.

Acknowledgments

We thank the reviewers for their comments regarding our paper for its improvement.

Conflict of interest

The authors declare that the research was conducted in the absence of any commercial or financial relationships that could be construed as a potential conflict of interest.

Publisher’s note

All claims expressed in this article are solely those of the authors and do not necessarily represent those of their affiliated organizations, or those of the publisher, the editors and the reviewers. Any product that may be evaluated in this article, or claim that may be made by its manufacturer, is not guaranteed or endorsed by the publisher.

Supplementary material

The Supplementary material for this article can be found online at: https://www.frontiersin.org/articles/10.3389/fpsyt.2023.1325583/full#supplementary-material

Footnotes

1. ^In the ICD-11 PD severity model there are no components or subcomponents as such, thus the comparisons with the other model described in this article are based on the guidelines provided for the identification of PD severity.

2. ^An additional qualifier is also included, the borderline pattern, which is not a dimensional trait, but rather a specifier associated with a diagnostic category from the previous edition of this diagnostic system.

3. ^There are no facets in the ICD-11 PD traits model, and comparisons with the other model described in this work are based on the guidelines provided for each trait domain.

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Keywords: ICD-11, DSM-5, personality disorder, dimensional models, severity, traits, convergent validity, meta-analysis

Citation: Hualparuca-Olivera L, Caycho-Rodríguez T, Torales J and Ramos-Campos D (2023) Convergence between the dimensional PD models of ICD-11 and DSM-5: a meta-analytic approach. Front. Psychiatry. 14:1325583. doi: 10.3389/fpsyt.2023.1325583

Received: 21 October 2023; Accepted: 10 November 2023;
Published: 30 November 2023.

Edited by:

Massimiliano Beghi, Azienda Unità Sanitaria Locale (AUSL) della Romagna, Italy

Reviewed by:

Rosa Patrizia Sant'Angelo, Azienda Unità Sanitaria Locale (AUSL) della Romagna, Italy
Bo Bach, Psychiatry Region Zealand, Denmark

Copyright © 2023 Hualparuca-Olivera, Caycho-Rodríguez, Torales and Ramos-Campos. This is an open-access article distributed under the terms of the Creative Commons Attribution License (CC BY). The use, distribution or reproduction in other forums is permitted, provided the original author(s) and the copyright owner(s) are credited and that the original publication in this journal is cited, in accordance with accepted academic practice. No use, distribution or reproduction is permitted which does not comply with these terms.

*Correspondence: Luis Hualparuca-Olivera, lhualparuca@continental.edu.pe

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