Fitness for work, rehabilitation and disability assessment
Fitness is a functional judgement about a job
Fitness for work is not a property of a person but a relationship between functional capacity, the demands of a specific job, and the risk to the worker and others. Start with job and task analysis: physical demands (lifting, posture, vibration, heat), sensory and cognitive demands (hearing, colour vision, vigilance, shift work), safety-critical elements, and the environment. Then assess capacity, then ask what reasonable adjustments would remove any mismatch - altered hours, equipment, task rotation, redeployment, phased return.
Three outcomes usually suffice: fit; fit with restrictions (stated functionally, e.g. 'no lone working at height until reviewed'); or unfit for that job, with a prognosis and review date. Avoid blanket exclusions based on diagnosis; the Equality Act 2010 requires individualised assessment.
Rehabilitation works best early: early contact, early intervention (physiotherapy; CBT-based approaches for distress) and early return to some work rather than none. Prolonged absence predicts non-return better than injury severity does. Disability assessment (ill-health retirement, benefits) requires evidence of permanence, functional limitation despite treatment and adjustment, and consideration of alternative work.
Traps: declaring someone permanently unfit when review would do; overlooking medication effects (sedation, hypoglycaemia); forgetting DVLA standards for Group 2 drivers; missing the interaction between safety-critical work and seizure risk.
Worked example. A bus driver has a first unprovoked seizure. He is not fit to drive pending neurological assessment; DVLA Group 2 standards generally require five years seizure-free off medication after a single unprovoked seizure, and ten years for established epilepsy. Alternative duties may be possible meanwhile.
Rule of thumb: if the advice cannot be expressed as a task plus a restriction, it is not yet a fitness opinion.