Sheehan Disability Scale: functional impairment assessment

What this assessment is

The Sheehan Disability Scale is a five-rating measure of functional impairment linked to symptoms.

Three ratings cover disruption in work or school, social life, and family life or home responsibilities. Two more record recent days lost and days with reduced productivity.

Only the first three ratings form the standard disability total. That total ranges from 0 to 30.

The two day counts remain separate.

Do not add all five.

The scale asks about impact, not the type of symptoms causing it. It can be used alongside measures of depression, anxiety, or another condition.

It cannot make a diagnosis.

Who it was designed for

David Sheehan developed the scale in 1981 for adults with mental health symptoms. The official instrument record describes its focus on work, social, and family functioning.

The person usually reports their own level of disruption. A clinician or other observer can also rate function when the correct form and perspective are identified.

The scale is used in clinical care, treatment studies, and outcome monitoring. It is broad enough to compare functional impact across different symptom patterns.

It is not a general activities-of-daily-living scale. Someone can be independent in self-care yet report severe disruption in work, relationships, or home responsibilities.

Function has levels.

Impact can differ.

How it is administered

The respondent rates how much symptoms disrupt three areas of life.

Each disruption rating uses a 0-to-10 visual and numeric scale. The person then reports the number of recent days lost and the number of days on which productivity was reduced.

The two productivity questions use the previous week. Use the complete validated form so the time frame and visual anchors remain consistent.

The assessment takes only a few minutes.

If work or school is not applicable, follow the official form's handling rule. Do not replace that response with zero. Zero would mean no disruption, which is different from not having a valid opportunity to rate the domain.

Record the context when comparing results over time. Employment, school attendance, caregiving, and home roles can change independently of symptoms.

Roles can change.

What it measures

The three core domains are:

• work or school function
• social and leisure function
• family life and home responsibilities

The scale measures disruption attributed to the symptoms being assessed.

The days-lost rating describes absence or inability to carry out normal responsibilities during the previous week.

The reduced-productivity rating describes days when the person was present but less productive because of symptoms.

These day counts add practical context to the three impairment ratings. They are not subscales and do not enter the 0-to-30 total.

Keep them separate.

The measure does not identify specific symptoms. It also does not assess basic self-care, mobility, cognition, or quality of life in detail.

How scoring works

Score each of the three disruption domains from 0 to 10.

Add those three values. The standard disability total ranges from 0 to 30.

Higher totals indicate greater reported functional disruption. Lower totals indicate less disruption.

Each domain can also be read separately. A total may hide a marked problem in one area and little disruption in the other two.

Keep the domains visible.

The days-lost and reduced-productivity values each range from 0 to 7 for the previous week. Report them separately from the total.

A psychometric study in adults with ADHD describes the three-domain total and confirms that the two productivity counts are excluded from it.

The standard total requires valid responses for the three core domains. If one is not applicable or missing, follow the licensed scoring guidance. Do not prorate two domains into a 30-point estimate.

Do not guess.

How to interpret Sheehan Disability Scale scores

Start with the 0-to-30 total, then inspect all three domains and the two day counts.

A higher total means the person reports more symptom-related disruption across major life roles.

There is no universal set of mild, moderate, or severe total bands that applies across all diagnoses and settings. Studies sometimes define response or remission rules for a specific trial or condition. Those rules should not be used as general diagnostic cutoffs.

The original disability measurement paper supports the three-domain structure. It does not turn the total into a diagnosis.

For repeated assessment, compare the same symptom context and life roles. A lower score may reflect symptom improvement, fewer demands, a change in employment, or more support at home.

Ask what changed.

The day counts can make a result concrete, but one difficult week should not be treated as a stable estimate of long-term productivity.

One week is brief.

What the score cannot tell you

The Sheehan Disability Scale cannot diagnose depression, anxiety, ADHD, bipolar disorder, or another condition.

It cannot show which symptom caused the disruption. It also cannot separate illness effects from work conditions, family stress, physical health, discrimination, financial pressure, or lack of support.

A low total does not prove that symptoms are mild. Someone may have severe symptoms without current work, school, or family demands.

A high total does not establish inability to work or eligibility for disability benefits. Those decisions require broader evidence and their own standards.

The scale cannot select treatment. Use it with symptom assessment, clinical history, risk assessment when relevant, and the person's priorities.

Evidence and limitations

The Sheehan Disability Scale is brief and directly connects symptoms with everyday role function.

That focus is useful because symptom severity and functional impact do not always move together.

The measure also has limits. It relies on personal judgment. Different people can use the 0-to-10 scale differently. Work, social, and family opportunities vary by age, culture, health, and circumstance.

The total gives each domain equal weight even when one role matters more to the individual.

The productivity counts cover only one week and can change with schedules, holidays, or time away from work.

Use the scores to ask direct questions: Which area is most affected? What support is missing? Has the role changed? What improvement would matter?

The conversation gives the score meaning.