Sickness Impact Profile (SIP)

The SIP measures sickness-related dysfunction based on behaviour in order to provide an appropriate, valid, and sensitive measure of health status that will aid in assessing the outcome of health care services. (Ref. 1) It is “a behavior-based instrument for measuring the impact of sickness that is comprehensive in scope and applicability, and that is sensitive in detailing the kind of degree of impact, raises the question of what sources to tap to assure a representative catalog of sickness impacts” (Bergner et al.). (Ref: 3) The final revised version consists of 136 items in 12 categories: Sleep and rest, Emotional behaviour, Body care and movement, Mobility, Social interaction, Ambulation, Alertness behaviour, Communication, Work, Recreation and pastimes, and Eating. These 12 categories are aggregated into the Physical dimension (Ambulation, Mobility, and Body care), the Psychosocial dimension (Emotional behavior, Alertness behavior, Communication, and Social interaction), and the independent categories. (Ref: 2, 5, 8)

$160 (the final revised version from Medical Outcomes Trust, Inc.)

20-30 minutes (interviewer) (Ref: 2); 30-45 minutes (Ref: 8); 20-65 minutes (Ref: 5)

1975 (Original) & 1981 (Final Revised)

Items are written in first person and contain some compound sentences. Examples of the most difficult terms are "impatient" and "disoriented."

Check a statement (yes/positive) that describes a subject on a given day.

Self-report or interviewer-administered.

Overall SIP per cent score is calculated by summing the scale value of the checked statements dividing the sum of the values of all items and multiplying it by 100. Categorical score is calculated in the same manner. Each item is weighted. Higher score means more sever disability.

Note that there are four versions available: the 312-item original (prototype) version, the 189-item long and 138-item short revised versions, and the 136-item final version. The 136-item final version is reviewed here. SIP has been translated to many languages such as Chicano*, Chinese (Hong Kong), Dutch, Swedish*, and UK*. Additionally, Mapi Research Institute (http://www.mapi-research-inst.com/) is currently under translation to some European languages. A Stroke-Adapted 30-item SIP was also introduced. *We cannot find literatures describing these translated versions.

Marilyn Bergner, PhD, Ruth A. Bobbitt, PhD, William B. Carter, PhD, and Betty S. Gilson, MD (the final revised version)

Copyright is held by Johns Hopkins University (V2933 P180 THRU 203 (COHD)).

Department of Health Services
University of Washington
Seattle, WA 98195

No information found.

www.outcomes-trust.org

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Category and Item analyses were done in order to reduce categories and items for the final revised version. (Ref: 2)

The general adult population has a SIP score of about 5. An SIP score of 20 indicates the need for substantial daily care, and a score of greater than 30 indicates the need for almost complete care. (Ref: 8) Mean total scores based on 11 of the 12 categories ranging from 34.8 to 39.4 for a sample of very frail elderly persons receiving home care were reported. (Ref: 5)

r = 0.75-0.92 for score, and r = 0.45-0.60 for checked items (item agreement) over different interviewer, forms, administration procedures, and subjects. (Ref: 2)

0.97 for an interviewer administration and 0.87 for an interviewer-delivered self-administration. The difference between two types is statistically significant (p < 0.01). (Ref: 2)

Cronbach’s alphas in two field trials were reported as 0.97 and 0.94. (Ref: 2) 0.95, 0.92, 0.94, 0.95, and 0.95 for the global SIP score for the time periods of baseline, 1, 3, 6, and 12 months respectively were also reported. (Ref: 8)

Mail-delivered self-administration was reported to have lower internal consistency. (Ref: 2) SA-SIP30, a short stroke adapted 30-item SIP version, were introduced. (Ref: 9)

The correlations between SIP score and self-assessment of dysfunction was 0.69, self-assessment of sickness was 0.36, the National Health Interview Survey Index of Activity Limitation was 0.55, the clinician assessment of dysfunction was0.50, and the clinician assessment of sickness was 0.40. (Ref: 2) The correlations between corresponding scale scores of the SIP and SF-36 were found as follows: physical functioning r = 0.78, social functioning r = 0.67, and overall functioning r = 0.73 (n = 25 veterans). (Ref: 6)

No information found.

Reviewed by the staff and outside professionals. (Ref: 3)

Found no change with stroke patients (Ref: 4) Overall SIP and eight subscores were significantly improved at 1 year compared with baseline (p < 0.05) for 127 patients with a prolonged surgical critical illness. (Ref: 8)

Yes (Ref: 5, 6)

Yes (Ref: 1-4, 7-9)