Return to work after stress-related sick leave: evidence and evaluation criteria

Abstract

Returning to work after stress-related sick leave constitutes a distinct phase of the recovery process, with its own decisions on workload, sequence and follow-up. Mental Health UK’s Burnout Report 2026 records that, among those who took time off for high or extreme pressure or stress, 17% had a formal return-to-work or recovery plan and 27% received no support at all on returning. Evidence from controlled trials, synthesized in a 2020 Cochrane review of populations with depression, supports interventions that combine clinical care with work-directed measures. The efficacy of the return-to-work plan as a specific protocol remains to be established: its evaluation requires measuring stated acceptance, organizational indicators and clinical course simultaneously against a comparison group.

Introduction

Absence from work for mental health reasons is studied above all in its prevention and treatment phases. The subsequent phase, the return to the job, receives less attention in the literature and less structure in organizational practice, even though it brings together a clinical recovery still under way and re-exposure to the conditions associated with the onset of the condition.

A fitness-for-work certificate attests to the capacity to work without specifying the sustainable load in a specific job. The distance between the two corresponds to an organizational decision: what workload is resumed, in what order, for how long and with what review mechanism. This set of decisions, when formalized in writing, is called a return-to-work plan.

Prevalence of return-to-work support

Mental Health UK’s Burnout Report 2026, built on a YouGov survey of 4,502 UK adults, of whom 2,591 were working, with fieldwork carried out from 3 to 5 November 2025, includes questions on the phase after the leave.

Among those who took time off for high or extreme pressure or stress, 27% say they received no support at all on returning and 17% had a formal return-to-work or recovery plan. The report itself associates the absence of support with the risk of relapse and with repeated absence; the survey’s cross-sectional design precludes attributing causality to that association.

The report places those two figures in context: 91% of adults report high or extreme pressure or stress over the past year, 20% took time off for mental health problems caused by stress, and the 25 to 34 age band becomes the most exposed, at 96%, ahead of the 35 to 44 band that led the previous edition.

The figures come from the UK working population and describe that labor market. Transferring them to the Spanish population would require its own measurement.

Evidence from controlled trials on return to work

The Cochrane review “Interventions to improve return to work in depressed people”, published in 2020 and covering 45 studies and 12,109 participants with major depression or significant depressive symptoms, assessed interventions aimed at reducing sickness absence. Combining a work-directed intervention with a clinical intervention probably reduces days on sick leave over the first year, with a difference in the order of 25 days compared with usual care, and may also reduce depressive symptoms. Interventions limited to the workplace, without a clinical component, obtained inferior results.

The World Health Organization guidelines on mental health at work, published in 2022, devote one of their recommendation areas to the return to work and propose combining clinical care with work-directed measures during reintegration, within a framework that includes the prevention of psychosocial risks and manager training.

The precedent of psychological debriefing

The existence of a structured protocol does not establish its efficacy. The Cochrane review of psychological debriefing concluded that a single session applied routinely to people exposed to a traumatic event does not prevent post-traumatic stress disorder and might increase the risk in some cases. The methodological parallel with reintegration is direct: an intervention delivered after an adverse experience requires evidence of its own, regardless of its plausibility.

Variables of a return-to-work plan

A return-to-work plan operationalizes four variables: the initial workload, the sequence in which duties are recovered, the review schedule and who holds the decision on adjustments.

The relevant variable is the total load. Reducing hours without a proportional reduction in tasks keeps that load constant and concentrates its execution into less time.

The definition of the load is specific to each job. In a classroom, the decisions are the groups assigned in the first weeks and the supervision duties excluded, with a written review date. In a hospital ward with rotating shifts, whether night shifts are included in the first month or deferred to the second. In a customer support team measured on response time, the volume of requests assigned and the redistribution of the difference.

The written record of these decisions fixes the reference against which adjustments are reviewed: without it, the workload has no agreed value against which deviations can be detected. The record also replaces the individual estimation of expectations with an explicit commitment carrying a date.

Criteria for evaluating a plan

Evaluating a return-to-work plan requires three planes of measurement, with different scopes.

• Stated acceptance. Perceived usefulness, willingness to take up the plan again and perception of support. It reports on the person’s experience and its reach ends there.
• Organizational indicators. Relapse, fresh leave for the same cause, repeated absence and turnover over six- and twelve-month windows, compared against returns without a plan.
• Clinical course. Validated instruments for symptoms and functioning, administered before the return and at several points afterward.

Comparison is the central methodological condition. Without a comparison group, the improvement observed after sick leave cannot be distinguished from the natural course of the condition or from regression to the mean, and attributing the change to the plan is left without support.

On the ERL scale that distinction is formalized. User acceptance and scientific evidence constitute two of the six dimensions assessed before a transfer is authorized, and a high score on the first leaves the demand of the second intact. No solution is transferred below ERL-3.

Limitations of the available evidence

The prevalence data come from a single cross-sectional, self-reported survey of the British population: they describe associations, with no basis for causal inference or for extrapolation to other labor markets.

The trial evidence corresponds to populations with depression. Stress-related absence overlaps only partially with that clinical picture, and transferring the results to this population requires specific confirmation.

The return-to-work plan, defined as a written agreement on workload, sequence and review, lacks a specific evaluation in the sources reviewed. Its efficacy is a hypothesis awaiting a test.

Conclusions

Returning after stress-related sick leave constitutes a phase with decisions of its own, distinct from prevention and from treatment. The available survey data indicate that a formal return plan is a minority practice in the population studied. The trial evidence supports interventions that combine a clinical component with a work component in populations with depression. The efficacy of the return-to-work plan as a specific protocol awaits a design with a comparison group that measures stated acceptance, organizational indicators and clinical course at the same time.

Open research lines: Resilience Program

Resilience Program is yeshcube’s applied research line devoted to emotional support following high-pressure situations. Its open questions coincide with those posed by reintegration: at what moment offering support is appropriate, which formats each context tolerates, how to avoid premature intervention, and which indicators allow the safety and usefulness of a resource to be judged. The program sits at an early stage of the ERL scale, with no conclusive results and no transferred solutions.

Its priority validation contexts are emergency and rescue personnel, people coming back from intense operational environments, and families emerging from prolonged isolation. Workplace emotional wellbeing in its broad sense belongs to Care Program.

Collaborating on return-to-work research

Resilience Program is developed within Allies, yeshcube’s scientific collaboration system, with four partner types and three principles: value for value, traceability and independence. No partner can veto a publication.

Evaluating reintegration calls for follow-up data held by organizations. The line is of interest to occupational health and risk prevention services that record relapse and repeated absence, to scientific teams researching reintegration and workload, and to organizations willing to compare returns with and without a plan.

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References

• Mental Health UK. Burnout Report 2026. YouGov survey of 4,502 UK adults (2,591 in work), fieldwork from 3 to 5 November 2025.
• Cochrane. “Interventions to improve return to work in depressed people”. Cochrane Database of Systematic Reviews, 2020. 45 studies, 12,109 participants.
• Cochrane. “Psychological debriefing for preventing post traumatic stress disorder (PTSD)”. Cochrane Database of Systematic Reviews, 2002.
• World Health Organization. Guidelines on mental health at work. 2022.