Clinic operations and retention
Can you compare these physical therapy outcome scores?
Direct answer
Before subtracting two outcome scores, check what each number represents. You need the questionnaire's name, version, score type, assessment date, and enough completed responses. Then follow its owner's scoring and comparison rules. A missing baseline, the earlier assessment used for comparison, does not show zero improvement. A different version number does not always prevent comparison. The useful question is whether these two records support the change you want to describe.
Two numbers in the chart are not yet a comparison
Imagine a physical therapist (PT) preparing for a reassessment. This is a hypothetical example, not a patient case.
Today's questionnaire has a score. The evaluation note names the same questionnaire, but the baseline score field is blank. A scanned form exists elsewhere in the chart. The PT could call the baseline missing, or look for that original form first.
In the next chart, both scores are present. However, the forms show different version numbers. Rejecting the comparison immediately would create a different problem: some versions share a comparable scoring scale.
Neither chart is ready for a conclusion based on the summary fields alone. The PT needs the underlying record and the instructions that apply to it. That check comes before deciding whether a numerical change matters.
Start with the measure, not the number
A patient-reported outcome measure is a structured way to record what a patient reports about their health or function. Here, we focus on questionnaire scores.
Our recommended first step is to identify:
- The measure's full name and version.
- What it measures, such as physical function.
- Who answered it.
- The assessment date.
- Whether the number is a raw total, meaning added responses, or a score converted using the questionnaire's scoring method.
- Whether enough items were answered under that measure's instructions.
Keep the original form available when possible. An unexplained number in a summary field may not answer these questions.
Do not change a questionnaire to make the records match. DASH stands for Disabilities of the Arm, Shoulder and Hand. QuickDASH is its shorter version. The Institute for Work & Health warns that modifying DASH or QuickDASH items, responses, or scoring changes the questionnaire. Its published measurement properties no longer apply to the modified version. Those properties describe how well the questionnaire measures what it is meant to measure.
That warning concerns these instruments. It is not a rule that every difference between two assessments makes comparison impossible.
One unanswered item is not the same as a missing baseline
QuickDASH is a questionnaire about upper-limb disability and symptoms. Its main score uses an eleven-item section.
The official QuickDASH scoring guide requires at least ten of eleven responses for that main score. More than one unanswered item prevents calculation under those instructions.
This creates two different decisions:
- Ten responses: One missing item does not, by itself, prevent the main score. Follow the guide's scoring method.
- Nine responses: Do not calculate that main score as though the form met the completion rule.
The optional work and sport/music sections have their own rules. Each requires all four responses and is scored separately. Do not carry the main section's missing-item allowance into those sections.
These are QuickDASH rules, not a general policy for every questionnaire. They also do not provide a way to reconstruct a baseline assessment that was never recorded.
Different versions can sometimes be compared
PROMIS stands for Patient-Reported Outcomes Measurement Information System. Its measures cover different aspects of health and function.
HealthMeasures gives a useful example in its version-comparison guidance. A short form is a shorter questionnaire with a fixed set of questions. A T-score is a score converted to a common scale for that measure, not the raw total of responses. PROMIS adult Physical Function v1.2 and v2.0 short-form T-scores can be compared.
That permission is specific. Check the measurement system, respondent type, measured area, and version against the applicable table.
The table's matching comparison labels apply within that table. They are not permission to compare every PROMIS score with every other PROMIS score.
The practical lesson is two-sided. Do not reject a comparison only because version numbers differ. Do not approve one only because the numbers look alike.
Five records, five different decisions
The examples below are hypothetical. They classify what the record supports, not whether a patient improved or needs more treatment.
| What the chart contains | What you can conclude | What to do next |
|---|---|---|
| Today's questionnaire score, but no baseline score or completed baseline form | The recorded baseline-to-today numerical change is unavailable. | Look for the original assessment. If none is found, state the gap and date today's assessment clearly. |
| A baseline QuickDASH main section with ten of eleven responses | One missing item does not automatically prevent the main score. | Apply the official scoring instructions, then check the other comparison details. |
| A baseline QuickDASH main section with nine of eleven responses | It does not meet the main section's completion rule. | Check whether the original record contains a missing page or response. Do not invent an answer. |
| Adult Physical Function v1.2 and v2.0 PROMIS short-form T-scores | HealthMeasures explicitly permits this specified version comparison. | Confirm that the records really match those measure and score details. |
| Two different questionnaires that both display numbers from zero to one hundred | The shared range alone does not establish that the scores mean the same thing. | Check the instruments' comparison guidance rather than subtracting the numbers on appearance alone. |
The QuickDASH rows follow its main-section completion rules. The PROMIS row follows the specific HealthMeasures version example. The missing-record actions are our recordkeeping recommendations, not payer requirements.
Leave an unknown baseline unknown
If the original baseline cannot be found, today's valid assessment can become a dated reference for future comparisons. It cannot supply the missing earlier number.
Here is a hypothetical record note:
Baseline QuickDASH main section contains nine of eleven responses. It does not meet the scoring guide's completion rule. No baseline-to-today score change was calculated. Today's completed assessment is recorded separately with its date.
Use the facts that apply to the actual chart. Do not copy this example as a standard finding.
If you later locate the original assessment, follow your clinic's record-correction process. Do not label answers collected today as though they were recorded at the earlier visit.
Visit counts and exercise logs may answer other useful questions. They do not fill a missing questionnaire score. Our guide to measuring home exercise adherence explains why different records should keep their different meanings.
Comparable change is not automatically meaningful change
After establishing a valid comparison, you still need to interpret it.
HealthMeasures states that no single meaningful-change number fits every patient, circumstance, and purpose. It also distinguishes changes within one person from comparisons between groups.
Do not turn a threshold found for one setting into a universal pass-or-fail test. This article provides no numerical improvement threshold. It also does not determine discharge, treatment need, or payment.
Keep the score alongside the patient's account and the clinical assessment. A number does not replace agreement about the patient's goal or the separate work of planning what happens when PT ends.
Make the next comparison easier to understand
For your next reassessment, choose one chart and check the records before describing change. Can another clinician identify the measure, dates, scoring method, and any unresolved gap?
If not, make those details clear. The aim is not to produce a better-looking score. It is to say what the available record actually supports.
Scope: This guide uses instrument-owner guidance checked October 24, 2026. It is not a billing guide or a rule for every outcome measure.
For information about our separate home-exercise product, see the HepBuddy overview. This article does not describe a HepBuddy questionnaire-scoring feature.