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Fidelity and IPS: does quality of implementation predict vocational outcomes over time for organizations treating persons with severe mental illness in the Netherlands?

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Social Psychiatry and Psychiatric Epidemiology Aims and scope Submit manuscript

Abstract

Purpose

Individual placement and support (IPS) is an evidence-based supported employment intervention. Quality of IPS implementation is assessed using a validated fidelity scale. Previous studies found a positive association between fidelity and employment outcomes at a single time-point. This study examines the longitudinal associations between IPS fidelity scores and employment outcomes.

Methods

We examined fidelity and employment outcome data for 27 IPS programs in the Netherlands providing IPS. These programs received at least one fidelity assessment and reported quarterly employment outcomes for at least one year to a central registry between 2014 and 2019. We first examined changes over time for fidelity and employment outcome. Then we analyzed the longitudinal associations between the quarterly employment outcomes and the IPS fidelity assessments on multiple time-points using a mixed-model analysis for the 17 programs with at least two fidelity assessments.

Results

Both IPS fidelity and employment outcomes improved over time, with the largest improvement in employment outcomes achieved after 18 months of implementation. We found a significant positive longitudinal association between IPS-fidelity and employment.

Conclusions

Improvement of fidelity is associated with improvement of employment outcomes over time. Future research should be focused on the improvement of specific elements of IPS implementation and their influence on employment outcomes.

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Authors and Affiliations

  1. Phrenos Center of Expertise for Severe Mental Illness, Utrecht, The Netherlands

    Lars de Winter, Christianne Couwenbergh, Jaap van Weeghel & Cris Bergmans

  2. Westat, Lebanon, NH, USA

    Gary R. Bond

Authors
  1. Lars de Winter
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  2. Christianne Couwenbergh
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  3. Jaap van Weeghel
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  4. Cris Bergmans
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  5. Gary R. Bond
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Corresponding author

Correspondence to Lars de Winter.

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The authors declared that they did not have a conflict of interest for this study.

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de Winter, L., Couwenbergh, C., van Weeghel, J. et al. Fidelity and IPS: does quality of implementation predict vocational outcomes over time for organizations treating persons with severe mental illness in the Netherlands?. Soc Psychiatry Psychiatr Epidemiol 55, 1607–1617 (2020). https://doi.org/10.1007/s00127-020-01890-0

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  • DOI: https://doi.org/10.1007/s00127-020-01890-0

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