Cited by 133Digital Mental Health InterventionsMental Health Treatment and AccessArtificial Intelligence in Healthcare and Education

The DOI matches its Crossref record; 50 of the 50 references it cites were found in a registry or an index; 1 of the 31 sources its claims cite were checked for support.

Closing the accessibility gap to mental health treatment with a personalized self-referral chatbot

Open access

Published version of a preprint

Abstract

Inequality in treatment access is a pressing issue in most healthcare systems across many medical disciplines. In mental healthcare, reduced treatment access for minorities is ubiquitous but remedies are sparse. Here we demonstrate that digital tools can reduce the accessibility gap by addressing several key barriers. In a multisite observational study of 129,400 patients within England's NHS services, we evaluated the impact of a personalized artificial intelligence-enabled self-referral chatbot on patient referral volume and diversity in ethnicity, gender and sexual orientation. We found that services that used this digital solution identified substantially increased referrals (15% increase versus 6% increase in control services). Critically, this increase was particularly pronounced in minorities, such as nonbinary (179% increase) and ethnic minority individuals (29% increase). Using natural language processing to analyze qualitative feedback from 42,332 individuals, we found that the chatbot's human-free nature and the patients' self-realization of their need for treatment were potential drivers for the observed improvement in the diversity of access. This provides strong evidence that digital tools may help overcome the pervasive inequality in mental healthcare.

Overview

AI snapshot

Written from the paper’s full text.

TL;DR

In a multi-site observational study of ∼129,400 patients across 28 NHS Talking Therapies services, an AI-enabled self-referral chatbot was associated with a 15% increase in total referrals versus a 6% increase in matched control services. The tool disproportionately increased referrals among minority groups, and NLP analysis of 42,332 feedback entries suggested human-free interaction and self-realisation as key mechanisms.

Key findings

  • Services using the AI-enabled self-referral tool had a 15% increase in total referrals, compared with 6% in matched services using traditional self-referral methods; the difference was significant (χ²(1)=86.3, p<0.0001).
  • Referral increases were larger for minority groups: non-binary 235%, bisexual 30%, and ethnic minority 31%, versus female 18%, male 16%, heterosexual 14%, and White 15%. Odds ratios were non-binary vs female 2.83 (CI 2.264–3.545), non-binary vs male 2.90 (CI 2.314–3.629), bisexual vs heterosexual 1.14 (CI 1.074–1.219), ethnic minorities vs White 1.14 (CI 1.081–1.202), Asian/Asian British 1.21 (CI 1.116–1.318), and Black/Black British 1.24 (CI 1.108–1.378).
  • The tool did not negatively affect access to assessments: a two-way ANOVA found no significant interaction between time period and tool usage (F(1,13)=0.09, p=0.764).
  • NLP classification of 42,332 feedback entries found 89% positive, 7% neutral, and 4% negative feedback. Gender minority and bisexual individuals mentioned the tool’s human-free nature more than majority groups (χ²(1)=22.7, p<0.0001; χ²(1)=62.4, p<0.0001), while Asian and Black ethnic groups mentioned self-realisation more than White individuals (χ²(1)=46.6, p<0.0001) and convenience less (χ²(1)=24.2, p<0.0001).

Methods

  • Multi-site real-world retrospective observational study using routine NHS Talking Therapies data from 28 services: 14 implemented the AI-enabled self-referral tool (Limbic Access) and 14 matched controls did not; ∼129,400 patients were included, with three-month pre- and post-implementation periods and staggered service launch times.
  • Services were matched using Euclidean distance on two normalized features from the pre-implementation period; total referrals were compared with Chi-squared tests, demographic changes with percentage change and logistic regression odds ratios, and a self-referral-only sensitivity analysis was conducted.
  • Qualitative feedback from September 2021 to March 2023: 157,416 patients used the tool, 29% (N=46,166) gave free-text feedback, and after excluding responses under 10 characters, 42,332 entries remained. Reflexive thematic analysis identified nine themes; SBERT, PCA, and multi-class logistic regression with 100-fold cross-validation achieved a micro-average F1 score of 0.64; Chi-squared tests with Bonferroni correction compared theme proportions.

Limitations

  • The paper states possible cultural differences between NHS Talking Therapies services and that services adopting the tool may be inherently more open to digital health innovation, which could influence referral numbers; it notes implementation was not part of wider digital innovation programs and the increase was tightly linked to launch.
  • Evident from the text: the observational design cannot establish causality, and matching was based only on two normalized pre-period referral features, leaving potential residual confounding.
  • Evident from the text: the NLP analysis covers only the 29% of users who provided free-text feedback and excludes entries under 10 characters, and the classification model had moderate performance (micro-average F1=0.64), so feedback findings may not represent all users.

Model-written summary. Check it against the paper before relying on it.

Integrity signals

Registry

Crossref · 10.1038/s41591-023-02766-x

Cites

50 of 50 references verified0 citation errors · 0 not checkable

Statistics

Verification

Claims the paper makes

44 Own result · 31 Own interpretation · 20 Not checked yet · 13 Own method · 2 No basis given · 1 Supported

Verify all 30 references — free account
  • It may state two separate claims as one. 29
  • Probably not a substantial claim. 15
38 of 38
  • The paper relies on this without support.

    NHS Digital publicly available data undergoes quality checks and is comprehensive enough for high-quality analysis.

    “The publicly available data undergoes quality checks and is a comprehensive dataset that facilitates high-quality analysis.”
  • The paper relies on this without support.

    The routine questionnaires and screening questions have not been typically collected at the point of referral in NHS Talking Therapies, but rather during the first assessment on a phone call.

    “These routine questionnaires and screening questions have not been typically collected at the point of referral in NHS Talking Therapies, but rather during the first assessment on a phone call.”
  • The paper relies on this without support.

    The feedback entries provided by patients are representative of the experiences of all patients who used the tool.

    “From September 2021 to March 2023, a total of 157,416 patients used this novel self-referral approach, with 29% of these patients offering free-text feedback on their experience (N = 46,166).”
  • The paper relies on this without support.

    Mental health support is effective for many mental disorders.

    “Mental health support can reduce the burden and has been found to be highly effective for many mental disorders.”
  • The paper relies on this without support.

    Less is known about the marginal impact of AI technologies in supporting individuals of differing demographics seeking help.

    “less is known about the marginal impact of AI technologies in supporting individuals of differing demographics seeking help.”
  • The paper relies on this without support.

    The data used are recorded in routine practice by all NHS Talking Therapies services and reported by NHS Digital.

    “The data used in this study are recorded in routine practice by all NHS Talking Therapies services and are reported to the public monthly, quarterly, and annually by NHS Digital (NHS Digital).”
  • The paper relies on this without support.

    An increase in referrals can potentially lead to longer wait times for clinical assessment and may reduce the number of people who access these assessments.

    “An increase in referrals can potentially lead to longer wait times for clinical assessment and may reduce the number of people who access these assessments.”
  • The paper relies on this without support.

    The baseline increase in referrals in matched services is likely due to the national initiative to boost access across all NHS Talking Therapies services.

    “This baseline increase is likely to reflect the national initiative to boost access across all NHS Talking Therapies services.”
  • The paper relies on this without support.

    Non-binary, bisexual, and ethnic minority groups have been previously underrepresented in mental healthcare treatment.

    “These groups have been previously underrepresented in mental healthcare treatment”
9 of 9

Claims other papers make about this one

Each is checked against this paper’s own text: does it say what the citing paper says it does?

Statistics recomputed

Every reported test result, recomputed from its test statistic and degrees of freedom. A result shows as not adding up only once an independent check has confirmed it.

  • Not confirmedχ²(1) = 14.6reported p = .0036 · recomputed p < .001

    “χ 2 (1) = 14.6, p = .0036”

  • ConsistentF(1, 13) = 0.09reported p = .764 · recomputed p = .769

    “F(1, 13) = 0.09, p = .764”

  • Consistentχ²(1) = 30.8reported p < .0001 · recomputed p < .001

    “χ 2 (1) = 30.8,p < .0001”

3 of 3

Self-check

Percentages, sums and reported differences re-computed from the paper’s own numbers.

Self-check results appear here once an independent check has confirmed them.

Citations

Cites

Show all 49 references

Research works printed but not linked: 1

  1. Bhakta, R., Savin-Baden, M. & Tombs, G. Sharing secrets with robots? In Proc. EdMedia+ Innovate Learning (eds Viteli, J. & Leikomaa, M.) 2295–2301 (Association for the Advancement of Computing in Education, 2014).

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Metadata

Authors
Habicht, J., Viswanathan, S., Carrington, B., Hauser, T. U., Harper, R., & Rollwage, M.
Affiliations
University College London (GB)
Corresponding author
Habicht, Johanna
Venue
Nature Medicine
Published
2024-02
Volume
30
Issue
2
Pages
595-602
ISSN
  • 1078-8956 (ISSN-L)
  • 1546-170X
OpenAlex
W4391542646
Cited by
132
References
49
Citations by year
2026: 63 · 2025: 46 · 2024: 22
FWCI
51.95
Type
journal article
Language
en
Open access
Locations
  • Nature Medicine (publishedVersion)
  • medRxiv (acceptedVersion)
  • PubMed (publishedVersion)
Topics
  • Social Sciences › Psychology › Applied Psychology › Digital Mental Health Interventions
  • Health Sciences › Medicine › Psychiatry and Mental health › Mental Health Treatment and Access
  • Health Sciences › Medicine › Health Informatics › Artificial Intelligence in Healthcare and Education
Keywords
access to mental health care, artificial intelligence, health disparities, ethnic minorities, nonbinary patients, gender diversity, digital health tools, NHS mental health services, patient feedback
MeSH terms
Artificial Intelligence, Ethnicity, Female, Health Services Accessibility, Humans, Male, Mental Health, Minority Groups, Referral and Consultation

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