Sickness Impact Profile
Sickness Impact Profile Health Status Measure · Also known as: SIP, Sickness Impact Scale
The Sickness Impact Profile (SIP) is a comprehensive 136-item behavioral health status measure developed by Bergner and colleagues at the University of Washington in 1976. It assesses the impact of illness on daily activities and behavior across physical, psychosocial, and independent living dimensions. The SIP remains one of the most thorough and validated health status instruments.
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When to use it
The SIP is valuable in chronic disease management, health outcomes research, and population health studies where detailed assessment of behavioral and functional impact is important. It is particularly suited to conditions with substantial functional impact (arthritis, cardiac disease, chronic respiratory disease). The SIP requires longer administration time; consider shorter alternatives (SF-36, SF-12) when time is limited.
Strengths & limitations
- Comprehensive 136-item coverage captures subtle impacts of illness across behavior and activity domains
- Behavior-focused approach measures actual functional limitation, not just symptom burden
- Extensively validated with strong psychometric properties across diverse conditions and populations
- Sensitive to both large and small changes in health status; appropriate for longitudinal outcome tracking
- Strong predictive validity for healthcare utilization, mortality, and quality of life outcomes
- Length (136 items, 20–30 minutes) limits feasibility in time-constrained clinical settings
- Complex weighted scoring requires software or conversion tables; manual calculation is impractical
- Primarily developed in US populations; international adaptations may require re-weighting
- Behavioral focus may not capture symptom burden well; combines with symptom measures in comprehensive assessment
Frequently asked
How does SIP differ from SF-36?
SF-36 measures functional capacity (ability to perform activities); SIP measures actual behavior change due to sickness (what people do when ill). SF-36 is shorter (36 items) and simpler; SIP is comprehensive (136 items) with detailed behavioral categories. Choose SIP when detailed behavioral impact is important; SF-36 for efficiency.
What does a total SIP score of 25 mean?
A SIP total of 25 indicates moderate functional and behavioral impact of sickness—the person is experiencing disruption in approximately one-quarter of weighted health behaviors and activities. This suggests significant health burden affecting work, leisure, and self-care. Clinical interpretation considers the specific disease context.
Why are SIP items weighted rather than simply counted?
Factor analysis showed that some behaviors (e.g., inability to walk) have greater impact on overall health status than others (e.g., reduced TV watching). Weighting reflects these differential impacts, providing a more accurate composite health measure than simple item counting.
Can SIP be used in acute illness?
Yes, though it was developed for chronic illness. In acute illness, SIP captures the behavioral and functional disruption during the acute phase. Its sensitivity to change makes it useful in acute recovery tracking. However, for brief acute injuries, condition-specific measures may be more appropriate.
Sources
- Bergner, M., Bobbitt, R. A., Carter, W. B., & Gilson, B. S. (1981). The Sickness Impact Profile: development and final revision of a health status measure. Medical Care, 19(8), 787–805. DOI: 10.1097/00005650-198108000-00001 ↗
- Bergner, M., Bobbitt, R. A., Pollard, W. E., et al. (1976). The Sickness Impact Profile: validation and methodology for measuring health status. American Journal of Public Health, 66(12), 1196–1203. DOI: 10.1097/00001888-197611000-00010 ↗
- Gilson, B. S., Gilson, J. S., Bergner, M., et al. (1975). The Sickness Impact Profile: development of an outcome measure for health care. American Journal of Public Health, 65(12), 1304–1310. DOI: 10.2105/AJPH.65.12.1304 ↗
How to cite this page
ScholarGate. (2026, June 3). Sickness Impact Profile Health Status Measure. ScholarGate. https://scholargate.app/en/health-measurement/sickness-impact-profile
Which method?
Set this method beside its closest kin and read them side by side — the library lays the books on the table; the choice is yours.
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