PROMIS-29 Profile: 7 Domains & IRT T-Score Guide

Q: What is promis-29 and how is it used in clinical research and healthcare?

PROMIS-29 (v2.0/v2.1) is an NIH-developed 29-item adult patient-reported outcome profile comprising seven 4-item health domains (Physical Function, Anxiety, Depression, Fatigue, Sleep Disturbance, Ability to Participate in Social Roles and Activities, and Pain Interference) plus a single 0–10 Pain Intensity item, scored onto a standardized IRT T-score metric (mean = 50, SD = 10) for clinical trials and routine clinical care.

Q: What standards or regulatory requirements govern promis-29?

PROMIS-29 is governed by the Northwestern University HealthMeasures PROMIS Scoring Manuals, encoded in Regenstrief LOINC under panel code 89998-9 (PROMIS-29 Profile v2.1), and aligned with FDA Patient-Focused Drug Development (PFDD) guidance for fit-for-purpose clinical outcome assessments.

Q: How does promis-29 integrate with EHR and health informatics workflows?

EHR patient portals and eCOA platforms render PROMIS-29 using LOINC-coded HL7 FHIR `Questionnaire` resources, compute IRT response-pattern T-scores via built-in scoring engines or the HealthMeasures API, and store the resulting domain T-scores as `Observation` resources for longitudinal graphing and clinical decision support.

Informational reference for clinical trial investigators, biostatisticians, and health outcomes informatics teams. This guide documents published NIH PROMIS psychometric standards and LOINC/FHIR specifications and does not constitute individual medical advice.

Clinical trial protocol authors, biostatisticians, and electronic Clinical Outcome Assessment (eCOA) engineers use this guide to implement the PROMIS-29 Profile (v2.0 and v2.1), convert raw 4-item short-form responses into Item Response Theory (IRT) T-scores (`mean = 50`, `SD = 10`), interpret domain directionality and severity thresholds, and encode PROMIS-29 panels using LOINC and HL7 FHIR.

What Is PROMIS-29 and How Is It Used in Clinical Research and Healthcare?

The PROMIS-29 Profile (developed under the National Institutes of Health [NIH] Patient-Reported Outcomes Measurement Information System [PROMIS] initiative and stewarded by Northwestern University’s HealthMeasures; Cella et al., Value in Health, 2019) is a standardized, 29-item multi-domain adult patient-reported outcome measure (PROM). It combines seven 4-item fixed short forms covering core physical, mental, and social health domains (28 items rated on 5-point ordinal Likert scales) with one single-item Global Pain Intensity rating scored on a 0–10 Numeric Rating Scale (NRS).

In clinical trials, comparative effectiveness studies, and value-based healthcare programs, PROMIS-29 provides a concise, non-disease-specific profile of patient health status that avoids the licensing restrictions of legacy instruments while maintaining rigorous Item Response Theory (IRT) calibration to the US general population.

The 7 Core Domains and 1 Pain Intensity Item of PROMIS-29 (v2.1)

Every item in the PROMIS-29 Profile uses a 7-day recall period (“In the past 7 days…”), except for the Physical Function and Ability to Participate in Social Roles and Activities domains, which carry no time frame (assessing current capability). The table below details all eight components, their T-score directionality, and standard HealthMeasures clinical severity thresholds:

PROMIS-29 Domain	Items & Scale	Recall Period	T-Score Directionality (Mean = 50, SD = 10)	Clinical Severity Cut-Points (T-Score)
1. Physical Function	4 items (`1–5` scale: Without any difficulty to Unable to do)	None (current capability)	Higher T-score = Better function	`≥ 45` Within Normal Limits; `40–44` Mild; `30–39` Moderate; `< 30` Severe limitation
2. Ability to Participate in Social Roles and Activities	4 items (`1–5` scale: Never to Always)	None (current capability)	Higher T-score = Better social participation	`≥ 45` Within Normal Limits; `40–44` Mild; `30–39` Moderate; `< 30` Severe limitation
3. Anxiety	4 items (`1–5` scale: Never to Always)	In the past 7 days	Higher T-score = Worse anxiety symptoms	`< 55` Within Normal Limits; `55–59` Mild; `60–69` Moderate; `≥ 70` Severe
4. Depression	4 items (`1–5` scale: Never to Always)	In the past 7 days	Higher T-score = Worse depressive symptoms	`< 55` Within Normal Limits; `55–59` Mild; `60–69` Moderate; `≥ 70` Severe
5. Fatigue	4 items (`1–5` scale: Not at all to Very much)	In the past 7 days	Higher T-score = Worse fatigue	`< 55` Within Normal Limits; `55–59` Mild; `60–69` Moderate; `≥ 70` Severe
6. Sleep Disturbance	4 items (`1–5` scale: Very poor to Very good / Not at all to Very much)	In the past 7 days	Higher T-score = Worse sleep disturbance	`< 55` Within Normal Limits; `55–59` Mild; `60–69` Moderate; `≥ 70` Severe
7. Pain Interference	4 items (`1–5` scale: Not at all to Very much)	In the past 7 days	Higher T-score = Worse pain interference	`< 55` Within Normal Limits; `55–59` Mild; `60–69` Moderate; `≥ 70` Severe
8. Pain Intensity (Global Item)	1 item (`0–10` Numeric Rating Scale: 0 = No pain, 10 = Worst imaginable pain)	In the past 7 days (average pain)	Reported as raw `0–10` integer (not converted to a T-score on its own)	`0` None; `1–3` Mild; `4–6` Moderate; `7–10` Severe pain intensity

IRT Scoring, T-Score Calibration, and Physical/Mental Summary Scores

Item Response Theory (IRT) Graded Response Model Scoring: Each 4-item domain produces a raw summed score ranging from 4 to 20. However, PROMIS measures should never be analyzed using raw summed scores alone. Instead, HealthMeasures recommends response-pattern IRT scoring (via the HealthMeasures Scoring Service or R/SAS IRT parameters), which handles missing items seamlessly, or raw-to-T-score conversion tables when all 4 items in a domain are answered.
T-Score Reference Population (`Mean = 50`, `SD = 10`): A T-score of 50 represents the mean of the 2000 US General Census calibration sample (with SD = 10). Because a higher PROMIS T-score always indicates more of the concept being measured, biostatisticians must account for domain polarity when evaluating statistical significance vs. clinical significance: a T-score of 60 on Physical Function is 1 SD better than average, whereas a T-score of 60 on Pain Interference or Fatigue is 1 SD worse than average.
PROMIS-29 Physical and Mental Health Summary Scores (Hays et al., 2018): Using factor scoring weights derived by Hays, Spritzer, Schalet, and Cella (Quality of Life Research, 2018), the 7 domain scores and the global Pain Intensity item (combined with Pain Interference into a composite pain factor) can be aggregated into two overarching summary T-scores: the PROMIS-29 Physical Health Summary Score and the PROMIS-29 Mental Health Summary Score.

What Standards or Regulatory Requirements Govern PROMIS-29?

In regulated clinical research and healthcare quality measurement, PROMIS-29 is governed by three primary frameworks:

FDA Patient-Focused Drug Development (PFDD) Guidance Series (Guidances 1–4): FDA CDER/CBER guidance on selecting, developing, or modifying Fit-for-Purpose Clinical Outcome Assessments (COAs) recognizes IRT-calibrated PROMIS short forms for measuring core physical function and symptom burden endpoints in drug and medical device trials, provided eCOA implementations preserve ALCOA+ data integrity principles.
Regenstrief Institute LOINC Standardization (`LOINC 89998-9`): The PROMIS-29 Profile v2.1 is formally standardized in LOINC under Panel Code 89998-9 (PROMIS-29 Profile v2.1 panel), with dedicated LOINC codes for each 4-item domain sub-panel, individual questions, and derived IRT T-scores.
Version Evolution (v1.0 vs. v2.0 vs. v2.1): PROMIS-29 v2.0 replaced the v1.0 Satisfaction with Participation in Social Roles domain with Ability to Participate in Social Roles and Activities; v2.1 updated slight item-wording harmonization in the Physical Function domain while preserving identical IRT item parameters and T-score crosswalks with v2.0.

How Does PROMIS-29 Integrate with EHR and Health Informatics Workflows?

Major EHR platforms (including Epic MyChart PROMIS modules and Oracle Health) and clinical trial EDC systems integrate PROMIS-29 through HL7 FHIR and the HealthMeasures Assessment Center API:

HL7 FHIR Questionnaire and Observation Representation: Patient portals deliver the 29 items using the HL7 FHIR Questionnaire and QuestionnaireResponse resources (carrying LOINC item codes and `ordinalValue` extensions) and write the resulting 7 domain T-scores and 1 Pain Intensity score as HL7 FHIR Observation resources with `unit: “{T-score}”` (`UCUM`).
Cross-Walking with Legacy Instruments (PROsetta Stone): Through the NIH-funded PROsetta Stone project, PROMIS-29 domain T-scores can be statistically linked on a common IRT metric to legacy scores such as the SF-36, PHQ-9 (Depression), GAD-7 (Anxiety), and FACIT-Fatigue.

Frequently Asked Questions

What is promis-29 and how is it used in clinical research and healthcare?

PROMIS-29 (v2.0/v2.1) is an NIH-developed 29-item adult patient-reported outcome profile comprising seven 4-item health domains (Physical Function, Anxiety, Depression, Fatigue, Sleep Disturbance, Ability to Participate in Social Roles and Activities, and Pain Interference) plus a single 0–10 Pain Intensity item, scored onto a standardized IRT T-score metric (mean = 50, SD = 10) for clinical trials and routine clinical care.

What standards or regulatory requirements govern promis-29?

PROMIS-29 is governed by the Northwestern University HealthMeasures PROMIS Scoring Manuals, encoded in Regenstrief LOINC under panel code 89998-9 (PROMIS-29 Profile v2.1), and aligned with FDA Patient-Focused Drug Development (PFDD) guidance for fit-for-purpose clinical outcome assessments.

How does promis-29 integrate with EHR and health informatics workflows?