Dash Score Calculator
Calculate the Disabilities of the Arm, Shoulder and Hand outcome score. Enter values for instant results with step-by-step formulas.
Formula
DASH = ((sum of n responses / n) - 1) x 25
Where n = number of completed responses (minimum 27 of 30), each item scored 1 (no difficulty) to 5 (unable). The result is a 0-100 scale where 0 = no disability and 100 = most severe disability.
Worked Examples
Example 1: Post-Rotator Cuff Repair Assessment
Problem: A 55-year-old patient is 3 months post rotator cuff repair. They rate most daily activities as having mild difficulty (score 2) but report moderate difficulty (score 3) with overhead activities, heavy lifting, and recreation. Pain is moderate (score 3).
Solution: Easy tasks (20 items): 20 x 2 = 40\nModerate tasks (7 items): 7 x 3 = 21\nPain/sleep items (3 items): 3 x 3 = 9\nTotal = 70, Items answered = 30\nDASH = ((70/30) - 1) x 25 = (2.33 - 1) x 25 = 33.3
Result: DASH Score: 33.3 (Moderate Disability) - Expected at 3 months post-op with continued rehabilitation anticipated
Example 2: Carpal Tunnel Syndrome Pre-Surgery
Problem: A 42-year-old office worker with bilateral carpal tunnel syndrome reports difficulty with writing, turning keys, and tingling. Most gross motor tasks are unaffected. Average item scores range from 1 for no difficulty to 4 for severe difficulty on fine motor tasks.
Solution: Gross motor tasks (18 items): 18 x 1 = 18\nFine motor tasks (6 items): 6 x 3.5 = 21\nSymptom items (6 items): 6 x 3 = 18\nTotal = 57, Items answered = 30\nDASH = ((57/30) - 1) x 25 = (1.9 - 1) x 25 = 22.5
Result: DASH Score: 22.5 (Mild Disability) - Moderate functional limitation primarily affecting fine motor tasks
Frequently Asked Questions
What is the DASH score and what does it measure?
The DASH (Disabilities of the Arm, Shoulder and Hand) score is a 30-item self-report questionnaire designed to measure physical function and symptoms in people with musculoskeletal disorders of the upper limb. It was developed by the American Academy of Orthopaedic Surgeons in collaboration with several other organizations to provide a standardized assessment tool. The questionnaire evaluates a patient ability to perform everyday activities such as opening jars, writing, turning keys, and carrying heavy objects. Scores range from 0 (no disability) to 100 (most severe disability), providing clinicians with a reliable way to track upper extremity outcomes over time.
How is the DASH score calculated from the questionnaire responses?
The DASH score is calculated by summing all 30 item responses (each scored from 1 to 5), dividing by the number of items answered, subtracting 1, and then multiplying by 25. The formula is DASH Score equals the quantity of sum of n responses divided by n, minus 1, all multiplied by 25. This transformation converts the raw score to a 0-100 scale where 0 indicates no disability and 100 indicates maximum disability. At least 27 of the 30 items must be answered for a valid score calculation, which allows for up to three missing responses without invalidating the overall result.
What is considered a normal or good DASH score?
In the general healthy population, the average DASH score typically falls between 10 and 15 points, indicating minimal upper extremity disability in daily life. A score below 15 is generally considered within the normal range for most adults without upper limb pathology. Scores between 0 and 25 suggest mild disability that may not significantly impact daily life activities or work performance. For post-surgical patients, a DASH score below 30 is often considered a satisfactory outcome. The minimal clinically important difference (MCID) for the DASH is approximately 10 to 15 points, meaning a change of this magnitude is considered meaningful to patients.
When should the DASH questionnaire be administered to patients?
The DASH questionnaire should be administered at the initial patient visit to establish a baseline measurement of upper extremity function before any intervention begins. It is then commonly repeated at regular follow-up intervals, such as 6 weeks, 3 months, 6 months, and 12 months post-treatment or post-surgery to track progress. This longitudinal tracking allows clinicians to monitor recovery progress and treatment effectiveness objectively over time with validated data. The DASH is appropriate for a wide range of upper limb conditions including rotator cuff tears, carpal tunnel syndrome, distal radius fractures, and tennis elbow.
What is the difference between the DASH and QuickDASH questionnaires?
The QuickDASH is a shortened version of the full DASH, containing only 11 items instead of the original 30 questions in the complete version. It was developed to reduce patient burden and administration time while maintaining measurement validity and reliability across clinical settings. Research has shown that QuickDASH scores correlate highly with full DASH scores with correlation coefficients of 0.94 to 0.97, making it an acceptable alternative. However, the full DASH provides more detailed information and has slightly better measurement precision, particularly for detecting small but clinically meaningful changes over time in rehabilitation.
Can the DASH score be used to determine work disability or compensation?
While the DASH score is widely used in occupational health and workers compensation assessments, it should not be the sole determinant of work disability status or compensation amounts. The DASH measures self-reported functional limitation, which may be influenced by psychological factors, motivation, and secondary gain considerations in medicolegal contexts. It is best used in conjunction with physical examination findings, imaging results, and functional capacity evaluations to provide a comprehensive disability assessment. Many jurisdictions and insurance companies recognize the DASH as a valid outcome measure for documenting upper extremity impairment levels.