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IGLOo: Sickness absence and sustainable return to work pilot study

Sustainable return to work: A pilot cluster randomised controlled trial of a multicomponent workplace ‘IGLOo’ intervention compared with usual return-to-work support

Status
Active, not recruiting
Phases
Unknown
Study type
Interventional
Source
ISRCTN
Registry ID
ISRCTN11788559
Enrollment
7063
Registered
2022-10-06
Start date
2022-11-15
Completion date
Unknown
Last updated
2026-05-11

For informational purposes only — not medical advice. Sourced from public registries and may not reflect the latest updates. Terms

Conditions

Mental health Mental and Behavioural Disorders

Interventions

Feasibility outcome: quantitative data describing recruitment (types of organisations participating, number of employees on long-term sick leave eligible to take part, number of employees who consent

Sponsors

Rotherham Doncaster and South Humber NHS Foundation Trust
Lead Sponsor

Eligibility

Sex/Gender
All
Age
18 Years to 100 Years

Inclusion criteria

Inclusion criteria: Current participant inclusion criteria as of 09/05/2023: 1. Individuals aged 18 years and over, on long-term sick leave (defined as > 14 days) due to occupational burnout and/or a common mental health problem as a primary reason or where is it known as associated comorbidity. 2. Line managers of participants on long-term sick leave. 3. Consistent with national clinical guidelines, common mental health problems meeting eligibility criteria for this study include: adjustment disorders (including reactive stress), major depressive disorder, generalised anxiety disorder, mixed anxiety and depressive disorder, post-traumatic stress disorder, obsessive-compulsive disorder, phobias, social anxiety disorder, panic disorder with/without agoraphobia, health anxiety, functional disorders and anxiety-related somatic symptoms 4. The study will also include participants whose sickness absence is related to other chronic illnesses which are known to be highly comorbid with common mental disorders listed above; such as coronary heart disease, diabetes, musculoskeletal problems, chronic obstructive pulmonary disease, and other long-term conditions (LTC). This inclusion criterion is necessary to properly identify participants who are affected by common mental disorders, but whose primary reason for sickness absence may be a LTC recorded in their occupational records. We acknowledge that some employees may prefer to report a LTC as a primary reason for sickness, rather than a mental health problem, considering that the latter may be perceived as stigmatising. Previous participant inclusion criteria: Large organisations with 600 employees and above. This will include NHS trusts, public and private sector employers in Yorkshire and in particular, the South Yorkshire and South Humber region. 1. Public and private sector organisations 2. Line managers of participants on long-term sick leave 3. Individuals aged 18 years and over on long-term sick leave (defined as > 14 days) due to occupational burnout and/or a common mental health problem as a primary reason or where is it known as associated comorbidity 4. Consistent with national clinical guidelines, common mental health problems meeting eligibility criteria for this study include: adjustment disorders (including reactive stress), major depressive disorder, generalised anxiety disorder, mixed anxiety and depressive disorder, post-traumatic stress disorder, obsessive-compulsive disorder, phobias, social anxiety disorder, panic disorder with/without agoraphobia, health anxiety, functional disorders and anxiety-related somatic symptoms 5. The study will also include participants whose sickness absence is related to other chronic illnesses which are known to be highly comorbid with common mental disorders listed above; such as coronary heart disease, diabetes, musculoskeletal problems, chronic obstructive pulmonary disease, and other long-term conditions (LTC). This inclusion criterion is necessary to properly identify participants who are affected by common mental disorders, but whose primary reason for sickness absence may be a LTC recorded in their occupational records. We acknowledge that some employees may prefer to report a LTC as a primary reason for sickness, rather than a mental health problem, considering that the latter may be perceived as stigmatising.

Exclusion criteria

Exclusion criteria: 1. Organisations that outsource their return-to-work management. 2. Organisations that have <2% of workers taking long-term sick in the past 12 months. 3. Individuals on long-term sick leave due to a severe mental disorder (psychotic disorder; bipolar disorder); substance use disorder; a neurological condition such as dementia; or under investigation for misconduct or formal disciplinary action 4. Workers aged 17 years of age and under

Design outcomes

Primary

MeasureTime frame
The number of days taken until the first day of return to work (partial or full return) using organisational records and self-report. Data collected monthly (organisational records) and at 3 6, 9 and 12 months (self-reported)

Secondary

MeasureTime frame
1. Work demands, measured by the HSE Job Demands Questionnaire, completed at baseline and 12 months 2. Return to work self-efficacy, measured by the RSE, at baseline, 3, 6, 9 and 12 months 3. Readiness to stay at work measured by the RRS, completed at 3, 6, 9 and 12 months if the employee has returned to work 4. Depression measured by the PHQ-9 collected at baseline, 3, 6, 9 and 12 months 5. Anxiety measured by the GAD-7, collected at baseline, 3, 6, 9 and 12 months 6. Burnout measured by the Utecht Burnout Scale (items 1, 2 and 3) completed at 3, 6, 9 and 12 months if the employee has returned to work 7. Intention to quit measured by ITQ (2 items) completed at baseline, 3, 6, 9 and 12 months 8. Productivity measured by the PRQ (1 item productivity questionnaire) completed at baseline, 3, 6, 9, and 12 months 9. Communication with the manager, measured by MCQ (3 items from manager communication questionnaire) completed at baseline, 3, 6, 9 and 12 months 10. Communication satisfaction whilst on sick leave will be measured by the CSSQ (communication satisfaction sick leave questionnaire) collected at baseline, 3, 6, 9 and 12 months 11. Return to work competency measured by the employee's line manager competency questionnaire, 16 items collected at 3, 6, 9 and 12 months (if remains on long-term sick leave, do not ask when returned) 12. Manager support measured by the HSE manager's support questionnaire - collected at 3, 6, 9 and 12 months if the employee has returned to work 13. Job crafting measured by the 15-item JCRQ collected at 3,6,9 and 12 months if the employee has returned to work 14. Colleague support measured by 1 item from the workplace acceptance scale collected at 3, 6, 9 and 12 months if the employee has returned to work 15. Autonomy measured by Autonomy from the Basic Psychological Needs Satisfaction at Work Scale collected at 3, 6, 9 and 12 months if the employee has returned to work 16. Quality of life measured by Euro-Qol quality of life questionnaire

Countries

England, United Kingdom

Outcome results

None listed

Source: ISRCTN (via WHO ICTRP) · Data processed: May 16, 2026