Brief Pain Inventory (BPI)
The BPI (Brief Pain Inventory) is a self-report questionnaire that measures pain severity (worst, least, average and current pain over the last 24 hours) and pain interference with daily functioning, each rated 0–10. It was developed for cancer pain by the Pain Research Group of the WHO Collaborating Centre for Symptom Evaluation in Cancer Care and later validated in chronic non-malignant pain.
For professional reference, research, and education only. Not for diagnosis or medical advice.
BPI Worst-Pain Severity Grade
Enter a total score to see its range.
Grades the single worst-pain item (0 = no pain, 10 = pain as bad as you can imagine), not the 4-item Pain Severity composite. Interference cutpoints (Shi et al., 2017) are shown in the scoring section.
Worst pain in the last 24 hours (0–10) Interpretation 7+ SevereWorst-pain rating 7–10: severe pain by its interference with function. 5–6 ModerateWorst-pain rating 5–6: moderate pain. 1–4 MildWorst-pain rating 1–4: mild pain. 0 No painWorst-pain rating of 0. Cutpoints were derived in cancer pain and may differ in other conditions. Serlin RC et al. Pain. 1995;61(2):277-284 (PMID 7659438): in cancer patients, worst-pain ratings of 1–4 correspond to mild, 5–6 to moderate and 7–10 to severe pain, based on interference with function.
The Brief Pain Inventory (BPI) is a self-report questionnaire that measures how severe pain is and how much it interferes with daily life. It was developed for cancer pain by the Pain Research Group of the WHO Collaborating Centre for Symptom Evaluation in Cancer Care [1].
What does the BPI measure?
The BPI measures both the intensity of pain and its interference with the person's life, and also asks about pain relief, pain quality and the person's view of the cause of pain [1]. Originally developed for cancer pain, it has since been validated in chronic non-malignant pain [3]. The BPI Short Form (BPI-SF) contains 9 items.
The BPI has two distinct composite subscales measured on 0–10 numerical rating scales (NRS):
- Pain Severity composite — the mean of 4 items rating worst pain, least pain, average pain, and current pain ("pain right now"). Provides an overall severity score from 0 to 10.
- Pain Interference composite — the mean of 7 items rating pain interference with general activity, mood, walking ability, normal work, relations with others, sleep, and enjoyment of life. Provides an overall functional impact score from 0 to 10.
Because pain interferes with mood and sleep, it is often tracked alongside the PHQ-9 for depression and the ISI for insomnia. The Pain Catastrophizing Scale measures how a person thinks about their pain.
How do you give the BPI?
The BPI is a self-report questionnaire. It can also be administered verbally or by a trained interviewer when needed.
Severity items refer to the last 24 hours ("pain right now" for current pain), and interference items to the past 24 hours (or past week in some research versions).
- Pain Severity composite: mean of worst, least, average, current pain (0–10)
- Pain Interference composite: mean of 7 interference items (0–10)
This interpreter does not replace clinical assessment.
How do you score and interpret the BPI?
The BPI reports two scores, severity and interference, and has been validated in cancer pain [1] and chronic non-malignant pain [3]. Some trials and services treat a score of 4 or more on either subscale as clinically significant pain; that is a convention, not a cutpoint from these studies.
Pain severity scale
The Pain Severity subscale consists of 4 items, each rated 0–10 on a numerical rating scale (NRS), where 0 = "no pain" and 10 = "pain as bad as you can imagine." The composite score is the arithmetic mean of the four responses.
| Item | Prompt |
|---|---|
| Worst pain | Worst pain in the last 24 hours |
| Least pain | Least pain in the last 24 hours |
| Average pain | Average pain in the last 24 hours |
| Current pain | Pain right now |
Grading thresholds for worst pain were derived in people with cancer, by examining how each level differentially impairs functional activity, mood, and sleep; the cutpoints were the same across the national samples studied [2]. These cutpoints apply specifically to the worst-pain item rather than to the 4-item composite mean.
| Severity category | Worst-pain rating (0–10) |
|---|---|
| None | 0 |
| Mild | 1–4 |
| Moderate | 5–6 |
| Severe | 7–10 |
Pain interference scale
The Pain Interference subscale consists of 7 items, each rated 0–10 (0 = "does not interfere," 10 = "completely interferes"). The composite score is the mean of all 7 responses.
Empirical cutpoints for total pain interference (BPI-PITS, the mean of all 7 items) were derived in people with cancer by pooling data from three Phase III clinical trials, and validated against ECOG performance status (p < 0.0001) [4].
| Interference category | BPI-PITS composite score |
|---|---|
| Mild | < 2 |
| Moderate | 2–5 |
| Severe | > 5 |
Note: these interference cutpoints were derived in cancer populations. Their applicability to non-cancer chronic pain has not been as formally established. The chronic non-malignant pain validation confirmed the two-factor structure (α = 0.88 for interference items) but did not derive interference-level cutpoints for that population [3].
BPI interference items
The BPI-SF asks respondents to rate how much pain has interfered with each of the following domains over the past 24 hours (or past week in some research versions), from 0 ("does not interfere") to 10 ("completely interferes"):
| # | Domain | Description |
|---|---|---|
| 1 | General activity | Day-to-day physical activity and movement |
| 2 | Mood | Emotional state and psychological wellbeing |
| 3 | Walking ability | Capacity to walk and get around |
| 4 | Normal work | Work inside and outside the home |
| 5 | Relations with other people | Social functioning and interpersonal relationships |
| 6 | Sleep | Ability to fall asleep and stay asleep |
| 7 | Enjoyment of life | Pleasure, quality of life, and positive engagement |
The same study grouped these 7 items into two subscales: activity-related interference (BPI-WAW: work, general activity, walking; optimal cutpoints 2/6) and mood-related interference (BPI-REM: relations with others, enjoyment of life, mood; optimal cutpoints 2/5) [4].
Psychometric properties
- Across cultures. The developers report that the BPI has shown reliability and validity across cultures and languages [1].
- Chronic non-malignant pain. In 440 adults referred to a chronic pain clinic, internal consistency was acceptable (Cronbach's α = 0.85 for the severity items and 0.88 for the interference items) [3].
- Two factors. Factor analysis in the same sample gave two distinct, independent factors; interference correlated more strongly with disability on the Roland-Morris Disability Questionnaire (r = 0.57) than severity did (r = 0.40), so the scales measure related but distinct dimensions [3].
- Responsiveness. Both scales improved significantly with treatment [3].
Limitations
- Not diagnostic. The BPI quantifies pain burden; it does not identify the cause of pain or diagnose a pain condition.
- Cancer-derived cutpoints. The severity [2] and interference [4] cutpoints were derived in cancer populations; their applicability to chronic non-cancer pain is less formally established.
- Convention, not a validated cutoff. The ≥4 threshold for clinically significant pain is a widely used convention rather than a cutpoint from a single validation study.
- Self-report and recall. Ratings reflect the past 24 hours and can be influenced by mood, expectations and recall.
For individuals: This page is a clinical reference, not a diagnostic tool. If you have concerns about your own symptoms, bring this information to a qualified mental health professional.
Related
Billing
In the US, the Brief Pain Inventory (BPI) is usually billed under these CPT codes. Payer rules vary.
- Publisher
- Charles S. Cleeland, PhD
- Terms
- Use requires permission via the Department of Symptom Research, MD Anderson Cancer Center; fees may apply.
Assessments
FAQ
Is the BPI self-report or clinician-administered?
The BPI is a self-report questionnaire. The Short Form (BPI-SF) contains 9 items. It can also be administered verbally or by a trained interviewer when needed.
What does a BPI score of ≥4 mean?
A score of 4 or more on the Pain Severity or Pain Interference subscale is a convention some trials and services use for clinically significant pain. It is not a cutpoint from the BPI validation studies: graded by its interference with function, a worst-pain rating of 4 is mild and 5 to 6 is moderate.
What are the severity grading cutpoints for the BPI?
In a study of people with cancer pain, worst-pain ratings on the 0–10 numerical scale corresponded to mild pain (1–4), moderate pain (5–6), and severe pain (7–10). These cutpoints were set by examining how worst-pain levels differentially impair functional activity, mood, and sleep. They are specific to the worst-pain item, not the 4-item composite mean.
Can the BPI diagnose a pain condition?
No. The BPI measures pain severity and functional interference — it is not a diagnostic tool for any specific pain condition. Diagnosis requires clinical evaluation, history, and appropriate investigations. The BPI is used to quantify pain burden, track outcomes over time, and support clinical decision-making.
References
- 1.Cleeland CS, Ryan KM. Pain assessment: global use of the Brief Pain Inventory. Ann Acad Med Singap. 1994;23(2):129-138.
- 2.Serlin RC, Mendoza TR, Nakamura Y, Edwards KR, Cleeland CS. When is cancer pain mild, moderate or severe? Grading pain severity by its interference with function. Pain. 1995;61(2):277-284.
- 3.Tan G, Jensen MP, Thornby JI, Shanti BF. Validation of the Brief Pain Inventory for chronic nonmalignant pain. J Pain. 2004;5(2):133-137.
- 4.Shi Q, Mendoza TR, Dueck AC, Ma H, Zhang J, Qian Y, Bhowmik D, Cleeland CS. Determination of mild, moderate, and severe pain interference in patients with cancer. Pain. 2017;158(6):1108-1112.
BPI-SF © Charles S. Cleeland, PhD. Use requires permission via the Department of Symptom Research, MD Anderson Cancer Center; fees may apply.
HiBoop does not offer this scale. This page is reference material.This library is an academic and clinical reference. A scale described here is not necessarily offered in HiBoop; each page says whether it is.