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PROMIS (Patient-Reported Outcomes Measurement Information System) is a standardized measurement system for patient-reported physical, mental, and social health. It was funded starting in 2004 by multiple U.S. National Institutes of Health (NIH) institutes through the NIH Roadmap for Medical Research, later the Common Fund. For clinical trial investigators and health services researchers, PROMIS measures offer a common set of calibrated instruments that can serve as outcome measures in study designs built under Good Clinical Practice standards.
Disease-specific outcome surveys are often hard to compare across conditions. PROMIS addresses this with item banks calibrated on a shared scale, which matters when choosing and validating a PROM.
What it is
PROMIS is a collection of patient-reported outcome measures covering health domains such as pain, fatigue, physical function, emotional distress, and social participation. It is built on Item Response Theory (IRT), which places questions on a common continuum so that scores remain comparable even when respondents answer different subsets of items.
HealthMeasures describes several ways to administer PROMIS content:
- Item banks: Large sets of calibrated questions for one domain.
- Short forms: A fixed set of 4 to 10 items for one domain, drawn from an item bank, usually producing one score.
- Computer adaptive tests (CAT): Items are chosen dynamically from an item bank based on earlier answers; standard CATs administer 4 to 8 items.
- Screen-to-CAT: A CAT whose first item screens respondents; those with the healthiest response stop there, and every respondent receives a score (1 to 8 items).
- Profiles: A fixed collection of short forms or CATs from multiple domains, producing one score per domain. PROMIS-29 is a widely used profile.
PROMIS T-scores have a mean of 50 and a standard deviation of 10 in the general population, according to HealthMeasures. Scores are interpreted relative to that reference population. Always check the scoring manual for each measure to see whether a higher score means more of the trait being measured.
Who runs it and what it covers
HealthMeasures, hosted at Northwestern University, works with the PROMIS Health Organization (PHO) to develop, maintain, disseminate, and implement PROMIS measures. According to HealthMeasures, 2004 to 2014 focused on measure development and validation, and 2014 to 2019 on dissemination, implementation, and moving to a self-sustaining funding model.
HealthMeasures organizes PROMIS content for adults, for children ages 8 to 17 (pediatric self-report), and for parent proxy reports about children ages 1 to 17. Across these, domains span physical health (such as physical function, pain, fatigue, and sleep), mental health (such as depression and anxiety), and social health (such as social roles and participation).
Licensing and cost terms vary by use. Review the licensing steps linked from the HealthMeasures site before using an instrument in a funded, sponsored, or commercial setting.
How to search or use it
Investigators writing a clinical trial protocol or planning an observational registry start from the HealthMeasures website, which hosts a Measure Library where you can review measure items, response options, administration options, and scoring. The library offers a Domain filter (for example Pain) and a Measurement System filter that includes PROMIS.
- Open the Measure Library on healthmeasures.net and filter by measurement system (PROMIS) and domain.
- Choose the population: adult, pediatric self-report, or parent proxy.
- Choose a format: a fixed short form or profile, or a CAT delivered through a platform that supports adaptive testing, such as an electronic patient-reported outcome (ePRO) system.
- Review the items, response options, and scoring information for the chosen measure.
- Review the licensing steps on the HealthMeasures site for your intended use.
- Score responses as described in the scoring manual for the measure; the HealthMeasures site lists a HealthMeasures Scoring Service under its Implement section.
Strengths and limits
Strengths:
- Short administration: Standard CATs use 4 to 8 items and are described by HealthMeasures as having high precision with low error.
- Common metric: Scores are reported as T-scores referenced to the general population, which supports comparison across domains and groups.
- Flexible formats: The same domains are available as item banks, short forms, CATs, and profiles.
Limits:
- Platform needs for CAT: Adaptive testing needs software that runs the item-selection algorithm, so it is not suited to paper-only collection.
- Scoring steps: Raw responses must be converted using the official scoring materials rather than interpreted directly.
- Licensing: Terms depend on the use case and must be checked before deployment.
Alternatives
Investigators typically compare PROMIS with other established patient-reported instruments:
| Instrument system | Approach | Typical output |
|---|---|---|
| PROMIS | Domain-specific IRT item banks, short forms, CATs, profiles | T-score per domain (mean 50, SD 10 in the general population) |
| SF-36 / SF-12 | Fixed multi-item general health survey | Summary and scale scores |
| EQ-5D | Five-dimension health utility instrument | Health utility index |
| Condition-specific scales (for example WOMAC) | Fixed questionnaires for one condition | Condition-specific scores |
How PROMIS compares to fixed instruments
Fixed instruments such as the SF-36 use a set questionnaire for every respondent. PROMIS can deliver the same domain as a short form or an adaptive test, so investigators can match the format to the study. Utility instruments such as the EQ-5D produce a single health utility value, whereas PROMIS reports separate domain scores.
FAQ
What does PROMIS stand for?
Patient-Reported Outcomes Measurement Information System. It was funded starting in 2004 by NIH institutes and is now maintained through HealthMeasures at Northwestern University and the PROMIS Health Organization.
What is the PROMIS-29?
PROMIS-29 is a profile: a fixed collection of short forms covering multiple domains, producing one score per domain. See the HealthMeasures Measure Library for its exact domains and items.
What are NIH PROMIS measures?
The term refers to PROMIS instruments developed with NIH support through the NIH Roadmap for Medical Research, later the Common Fund.
How does a PROMIS computer adaptive test work?
A CAT picks each next item from an item bank based on the respondent’s earlier answers. Standard PROMIS CATs administer 4 to 8 items.
What does a PROMIS T-score of 50 mean?
PROMIS T-scores have a mean of 50 and a standard deviation of 10 in the general population, so 50 is the reference-population average.
Sources
Checked November 7, 2026.
- HealthMeasures. PROMIS. https://www.healthmeasures.net/explore-measurement-systems/promis
- HealthMeasures. Interpret PROMIS scores. https://www.healthmeasures.net/score-and-interpret/interpret-scores/promis
