PROMs for physiotherapists: ODI, KOOS, DASH, NDI and Roland-Morris, explained

Why PROMs, and the three numbers you need

A patient-reported outcome measure (PROM) is a validated questionnaire the patient completes about their own pain, function or quality of life. Range of motion and strength tell you what the joint does; a PROM tells you what the patient can do with it. For a physiotherapist the PROM is the evidence that treatment is working, the argument for continuing it, and increasingly the thing an insurer or employer asks for.

Three numbers make a PROM usable in clinic:

• The score, and which direction is better. Most disability indices run 0 to 100 with 0 best; the KOOS runs 0 to 100 with 100 best. Mixing them up in a progress note is a real and common error.
• Minimal detectable change (MDC). The smallest change that exceeds measurement error. Below this, a difference between two visits is noise.
• Minimal clinically important difference (MCID), sometimes called minimal important change (MIC). The smallest change a patient perceives as worthwhile. It is estimated either from the distribution of scores or against an anchor such as a global rating of change, and the two methods give different answers, which is why ranges appear below.

When the MCID is smaller than the MDC, as happens with the NDI, you should use the MDC as your threshold. A change you cannot distinguish from error cannot be called clinically important.

Quick reference

Oswestry Disability Index (ODI)

What it is

Ten sections (pain intensity, personal care, lifting, walking, sitting, standing, sleeping, sex life, social life, travelling), each scored 0 to 5. The total is divided by the maximum possible and expressed as a percentage, so an unanswered section lowers the denominator rather than counting as zero. Fairbank and Pynsent’s 2000 review in Spine describes the versions in circulation and warns that several published copies contain misprints or omit the scoring instructions; use version 2.1a and keep the scoring sheet with it.

Interpretation bands

The bands used in the Fairbank and Pynsent review and widely adopted since: 0–20 minimal disability, 21–40 moderate, 41–60 severe, 61–80 crippled, 81–100 bed-bound or exaggerating. They are descriptive labels, not diagnostic categories.

Meaningful change

The 2008 international consensus led by Ostelo proposes a minimal important change of 10 points, or a 30 percent improvement from the individual’s baseline, and notes that the percentage threshold handles differing baselines better than a fixed number. Individual studies spread around that: Maughan and Lewis (2010) found 8 points by ROC analysis and 17 by standard error of measurement in a chronic low back pain class, and Bråten and colleagues (2022) found MIC estimates for the ODI, RMDQ and NRS in chronic low back pain with Modic changes sat at the lower end of earlier estimates, varying between a 15 and 40 percent reduction depending on whether “slightly improved” counted. For a surgical success threshold rather than minimal change, Solberg and colleagues (2013) found a 20-point ODI change best identified patients who were “much better” or recovered after lumbar discectomy.

When to use it

Moderate to severe low back pain, including radicular presentations and post-surgical rehabilitation, where the RMDQ would hit its ceiling. It is less sensitive at the mild end.

Roland-Morris Disability Questionnaire (RMDQ)

What it is

Twenty-four yes/no statements about how back pain affects daily activities (“I stay at home most of the time because of my back”). The score is the count of ticked statements, 0 to 24, lower is better. Developed by Roland and Morris in 1983 for primary care back pain research and still the fastest validated back disability measure to administer.

Meaningful change

The Ostelo 2008 consensus proposes 5 points or 30 percent of baseline. Maughan and Lewis (2010) found 5 points by SEM and 4 by ROC in chronic low back pain, which is unusually tight agreement across methods.

When to use it

Mild to moderate non-specific low back pain, primary care and early-episode presentations, and any setting where a two-minute questionnaire is the difference between data and no data. For severe disability it ceilings; switch to the ODI.

Neck Disability Index (NDI)

What it is

Vernon and Mior’s 1991 adaptation of the Oswestry for the cervical spine: ten items (pain intensity, personal care, lifting, reading, headaches, concentration, work, driving, sleeping, recreation), each 0 to 5, total 0 to 50. It is often reported doubled as a percentage; make sure the record says which. MacDermid and colleagues’ 2009 systematic review in JOSPT confirms it as the most used self-report measure for neck pain, with acceptable reliability and good translations available.

Interpretation bands

On the raw 0–50 scale, the commonly used bands are 0–4 no disability, 5–14 mild, 15–24 moderate, 25–34 severe, 35 and above complete.

Meaningful change

This is the instrument where the MDC matters most. Young and colleagues (2009), in patients with mechanical neck disorders in outpatient physical therapy, found an MCID of 7.5 points but a minimal detectable change of 10.2 points, and concluded that a 10-point change should be used as the threshold because the MCID lay inside measurement error. MacDermid’s review puts the MDC at around 5 of 50 for uncomplicated neck pain and up to 10 of 50 for cervical radiculopathy, and notes that reported clinically important differences range from 5 to 19 across studies. In practice: a 10-point change on the raw score (20 percentage points) is defensible; a 5-point change in an uncomplicated mechanical neck is suggestive; anything smaller is noise.

When to use it

Mechanical neck pain, whiplash-associated disorder, cervical radiculopathy, and cervicogenic headache. Add a headache-specific measure if headache is the primary complaint.

Knee injury and Osteoarthritis Outcome Score (KOOS)

What it is

Developed by Roos and colleagues as an extension of the WOMAC to cover younger, more active patients and the whole course from injury to osteoarthritis. Forty-two items across five subscales: Pain (9), Symptoms (7), Function in daily living (17), Function in sport and recreation (5), and knee-related Quality of Life (4). Each item is scored 0 to 4. Each subscale is transformed to 0–100 where 100 is no problems, using 100 − (mean item score × 100 / 4). Subscales are reported separately; there is no validated total score. Roos and Lohmander’s 2003 review notes the largest effect sizes are usually seen in the QoL subscale, followed by Pain.

Meaningful change

The KOOS is the clearest example of context-dependent thresholds. In 148 patients undergoing rehabilitation after total knee arthroplasty, Monticone and colleagues (2013) found minimal important changes of 16.7 for Pain, 10.7 for Symptoms, 18.4 for ADL, 12.5 for Sport/Recreation and 15.6 for QoL, with good discrimination between improved and stable patients on every subscale. Thresholds for ACL reconstruction or conservative osteoarthritis care will differ; quote the population with the number, and when in doubt a change of 8 to 10 points is commonly treated as the floor of clinical relevance for any subscale.

When to use it

Knee osteoarthritis, post-arthroplasty rehabilitation, ACL and meniscal injury, patellofemoral pain in active patients. For older, less active osteoarthritis patients the WOMAC subset within the KOOS can be scored on its own. Shorter forms (KOOS-PS, KOOS-12) exist for high-volume follow-up.

DASH and QuickDASH

What they are

The Disabilities of the Arm, Shoulder and Hand questionnaire was developed in the 1990s by the American Academy of Orthopaedic Surgeons, the Council of Musculoskeletal Specialty Societies and the Institute for Work and Health (Hudak and colleagues, 1996) as a single region-wide upper-limb measure. Thirty items on symptoms and function, each 1 to 5, scored as ((sum of responses ÷ number answered) − 1) × 25, giving 0–100 where 0 is no disability. Up to three items may be missing. Optional four-item Work and Sport/Performing Arts modules are scored separately. The QuickDASH keeps eleven items and the same formula.

Meaningful change

Franchignoni and colleagues (2014) administered both instruments to 255 patients with upper-limb musculoskeletal disorders before and after physiotherapy. Test-retest reliability was high (ICC 0.93 DASH, 0.91 QuickDASH). The minimal detectable change at 90 percent confidence was 10.81 points for the DASH and 12.85 for the QuickDASH. Triangulating distribution and anchor methods, they selected MCIDs of 10.83 points (DASH) and 15.91 points (QuickDASH), and proposed these as the lower boundary of a useful range whose upper boundary is the 15 and 20 points published by the DASH developers. For clinic use: 11 points on the DASH or 16 on the QuickDASH is the minimum you should call improvement; 15 and 20 are safe.

When to use which

QuickDASH for routine follow-up of rotator cuff, lateral elbow, carpal tunnel and distal radius presentations where three minutes matters. Full DASH where precision matters: complex hand injuries, return-to-work decisions, research. Add the Work module when occupation is the goal.

Running PROMs in a physiotherapy clinic

1. Pick one instrument per presentation and stick with it. Changing instruments mid-episode destroys the comparison. Match region to measure using the table above; for multi-region patients, pick the primary complaint.
2. Baseline before you treat. The first-visit score is the denominator for every percentage change you will ever quote. Have the patient complete it in the waiting room or on WhatsApp before the assessment, not after the first mobilisation.
3. Re-test at phase changes, not every visit. Every two to four weeks, at each change in treatment plan, and at discharge. Weekly scores add noise.
4. Compare against MDC first, MCID second. A change inside measurement error is not a change, whatever the patient says in the room. A change past the MCID is something you can write down as improvement.
5. Record the direction. “KOOS Pain 45 → 68” and “ODI 45 → 28” are both improvements. Make the note say so.
6. Show the patient. A plotted line from baseline to today does more for adherence than any explanation. It is also the honest basis for a conversation about discharge when the line has flattened.
7. Use the same version, every time. ODI 2.1a, NDI original scoring, KOOS by subscale. Mixed versions are a common reason two clinicians in the same clinic cannot compare scores.

Where this fits in a physiotherapy EMR

A PROM is only useful if it is administered at the right time, scored correctly, compared against the right threshold, and visible across visits. Paper does the first two badly and the last two not at all. When you choose software, make this one of the deciding questions; our 12-point EMR checklist puts it at point seven, and our essay on outcome tracking explains why clinics that track outcomes keep patients longer. For what tracking costs across platforms, see the pricing guide.