Barthel Index

The Barthel Index (Mahoney & Barthel 1965) measures functional independence in activities of daily living across ten domains (feeding, bathing, grooming, dressing, bowels, bladder, toilet use, transfers, mobility, stairs), yielding a total of 0–100. Higher scores reflect greater independence: 0–20 total dependence, 21–60 severe, 61–90 moderate, 91–99 slight dependence, and 100 independence. It is widely used in stroke, rehabilitation, and geriatric care, including the Shah 1989 modification for ordinal scoring.

Geriatrics General MedicineEvidence-BasedUpdated 2026-08-16

Feeding*

Bathing*

Grooming*

Dressing*

Bowels*

Bladder*

Toilet use*

Transfers (bed to chair and back)*

Mobility (walking or wheelchair)*

Stairs*

Clinical Notes

Formula

Barthel total = Feeding (0/5/10) + Bathing (0/5) + Grooming (0/5) + Dressing (0/5/10) + Bowels (0/5/10) + Bladder (0/5/10) + Toilet use (0/5/10) + Transfers (0/5/10/15) + Mobility (0/5/10/15) + Stairs (0/5/10) → 0–100.

Normal Range

100 = independent. 91–99 slight dependence, 61–90 moderate dependence, 21–60 severe dependence, 0–20 total dependence.

Clinical Notes

The Barthel Index was originally described by Mahoney and Barthel in 1965 as a simple ordinal scale of independence in activities of daily living. Ten domains are scored: feeding (0/5/10), bathing (0/5), grooming (0/5), dressing (0/5/10), bowels (0/5/10), bladder (0/5/10), toilet use (0/5/10), transfers (0/5/10/15), mobility (0/5/10/15), and stairs (0/5/10), for a total of 0–100. Shah and colleagues (1989) introduced a five-level modification of the item scoring to improve sensitivity. The scale is widely used to quantify disability after stroke, in rehabilitation, and in geriatric medicine; the bands of total (0–20), severe (21–60), moderate (61–90), slight (91–99), and independent (100) dependence aid interpretation.

References

Mahoney FI, Barthel DW. Functional evaluation: the Barthel Index. Md State Med J. 1965;14:61-65.
Shah S, Vanclay F, Cooper B. Improving the sensitivity of the Barthel Index for stroke rehabilitation. J Clin Epidemiol. 1989;42(8):703-709.

Calculator Information

Specialty

General Medicine

📋 Reference Ranges

Normal Range

100 = independent. 91–99 slight dependence, 61–90 moderate dependence, 21–60 severe dependence, 0–20 total dependence.

Reference ranges for this calculator
Classification	Range
Independent Fully independent in ADLs	100
Slight dependence Minimal assistance needed	91–99
Moderate dependence Moderate assistance needed	61–90
Severe dependence Major assistance needed	21–60
Total dependence Completely dependent in ADLs	0–20

What This Calculator Measures

Measures functional independence in ten activities of daily living, providing an objective disability score for rehabilitation, geriatric care, and stroke services.

How to Use

Select the descriptor that matches the patient's actual current performance for each of the ten activities.
Sum the item scores to obtain the Barthel total (0–100).
Interpret the dependence band and use serial scores to track functional change.

Interpretation Guide

100 = independent; 91–99 = slight dependence; 61–90 = moderate dependence; 21–60 = severe dependence; 0–20 = total dependence. The scale measures physical ADL performance, not cognition or caregiver burden.

Clinical Significance

The Barthel Index is a widely used, reliable measure of ADL independence whose serial scoring documents functional recovery after stroke and in rehabilitation, guiding therapy intensity and discharge planning.

When to Use

Baseline and serial functional assessment after stroke
Admission and discharge assessment in rehabilitation
Geriatric assessment of dependency and care needs
Measuring outcomes in clinical services

When Not to Use

To assess cognitive function or communication
To measure instrumental ADLs (shopping, finances, transport)
As the sole tool for discharge planning — combine with social and caregiver assessment

Limitations

Ceiling and floor effects limit sensitivity at the extremes.
Different versions (original vs. Shah-modified) are not directly interchangeable.
Does not capture quality of life or patient-perceived disability.

Worked Example

A 68-year-old woman one month after a moderate stroke needs help with feeding and stairs, is fully dependent for bathing, has occasional bladder accidents, and walks with help; she is independent in grooming, dressing, bowel control, toilet use, and transfers.

Inputs:

feeding: 5

bathing: 0

grooming: 5

dressing: 10

bowels: 10

bladder: 5

toiletUse: 10

transfers: 15

mobility: 10

stairs: 5

Barthel Index = 5 + 0 + 5 + 10 + 10 + 5 + 10 + 15 + 10 + 5 = 75/100 — MODERATE dependence, indicating the need for assistance with daily activities and structured rehabilitation.

Evidence

Source: Original Scale and Validation Studies
Reference: Mahoney FI, Barthel DW. Functional evaluation: the Barthel Index. Md State Med J. 1965;14:61-65. Shah S, Vanclay F, Cooper B. J Clin Epidemiol. 1989;42(8):703-709. Collin C, Wade DT, et al. Int Disabil Stud. 1988;10(2):61-63.
Reviewed By: MedCalcHub Clinical Team
Version: 1965
Updated: 2026-08

Mahoney FI, Barthel DW. Md State Med J. 1965;14:61-65.
Shah S, Vanclay F, Cooper B. J Clin Epidemiol. 1989;42(8):703-709.
Collin C, Wade DT, et al. Int Disabil Stud. 1988;10(2):61-63.

References

Mahoney FI, Barthel DW. Functional evaluation: the Barthel Index. Md State Med J. 1965;14:61-65. (Original scale)
Shah S, Vanclay F, Cooper B. Improving the sensitivity of the Barthel Index for stroke rehabilitation. J Clin Epidemiol. 1989;42(8):703-709. (Modified scoring validation)
Collin C, Wade DT, Davies S, Horne V. The Barthel ADL Index: a reliability study. Int Disabil Stud. 1988;10(2):61-63. (Reliability study)

Frequently Asked Questions

What score indicates the patient is ready for discharge?

There is no universal cut-off; discharge readiness depends on the care environment. Scores in the 61–90 range indicate moderate dependence requiring some support, while higher scores suggest greater independence.

Is the Barthel Index suitable for people with dementia?

It measures physical ADL performance and can be completed by an observer, but it does not assess cognition — use it alongside cognitive screening.

Disclaimer: This calculator is intended for educational and clinical decision support purposes only. The Barthel Index quantifies physical ADL dependence and should be used with clinical judgment and broader functional, social, and caregiver assessment.

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Barthel Index

Clinical Notes

Formula

Normal Range

100 = independent. 91–99 slight dependence, 61–90 moderate dependence, 21–60 severe dependence, 0–20 total dependence.

Clinical Notes

References

Mahoney FI, Barthel DW. Functional evaluation: the Barthel Index. Md State Med J. 1965;14:61-65.
Shah S, Vanclay F, Cooper B. Improving the sensitivity of the Barthel Index for stroke rehabilitation. J Clin Epidemiol. 1989;42(8):703-709.

Calculator Information

Specialty

General Medicine