TY - JOUR
T1 - The SIP68
T2 - An abbreviated sickness impact profile for disability outcomes research
AU - Nanda, Upasana
AU - McLendon, Patricia M.
AU - Andresen, Elena M.
AU - Armbrecht, Eric
N1 - Funding Information:
The results of this study were presented, in part, at the Seventh Annual Meeting of the Society for Quality of Life Research, October 29th–31st, 2000, Vancouver, Canada. This research was funded, in part, by the Centers for Disease Control and Prevention (CDC) through the Saint Louis University Prevention Research Center grant # U48/ CCU710807 (Special Interest Project SIP3-96/97). Our thanks are extended to Dr Robert Woolsey, M.D., and for the support of the Veterans Administration Medical Center, St Louis, MO. The Massachusetts longitudinal study is supported, in part, by a Cooperative Agreement (# U59/ CCU103370) with the Disability and Health Branch, Division of Birth Defects, Child Development, Disability and Health, of the United States Centers for Disease Control and Prevention, and grants from the United States Department of Education, Office of Special Education and Rehabilitative Services, National Institute on Disability and Rehabilitation Research (NIDRR; grants # H133660037, for field-initiated research, and # H133N50014, for the New England Regional Spinal Cord Injury Center). This work was begun with the collaboration of our colleague, Dr Allan Meyers, of Boston University School of Public Health, who died during the final phase of this work. His collaboration was invaluable and he will be missed.
PY - 2003/8
Y1 - 2003/8
N2 - The Sickness Impact Profile (SIP) is one of the most widely recognized generic health status instruments, but its length has often left it out of consideration for outcomes research. We assess a short alternative, the Sickness Impact Profile 68 (SIP68), for retest and proxy reliability, validity, and scaling properties, in a population of adults with disability (PWD). For convergent validity, the SIP68 was compared to the instrumental activities of daily living (IADLs), activities of daily living (ADLs) and the short-form 36 (SF-36). We completed 398 interviews with PWD, 131 index-proxy sets, and 40 retests. Retest intraclass correlations were above 0.75 for all scales and dimensions except the physical dimension (0.61). Proxy reliability ranged from 0.26 (psychological autonomy and communication) to 0.85 (somatic autonomy). Correlation between the SIP68 and SIP was 0.94 overall; between the SIP68 and similar scales of the SF-36 correlations was moderate, and highest for physical health scales. We repeated the SIP68 development factor analysis and reproduced a structure of the full SIP that included 65 of SIP68 items. However, 36 additional items were retained that are not part of the SIP68. Overall, the SIP68 shows promise for use as a disability outcomes tool.
AB - The Sickness Impact Profile (SIP) is one of the most widely recognized generic health status instruments, but its length has often left it out of consideration for outcomes research. We assess a short alternative, the Sickness Impact Profile 68 (SIP68), for retest and proxy reliability, validity, and scaling properties, in a population of adults with disability (PWD). For convergent validity, the SIP68 was compared to the instrumental activities of daily living (IADLs), activities of daily living (ADLs) and the short-form 36 (SF-36). We completed 398 interviews with PWD, 131 index-proxy sets, and 40 retests. Retest intraclass correlations were above 0.75 for all scales and dimensions except the physical dimension (0.61). Proxy reliability ranged from 0.26 (psychological autonomy and communication) to 0.85 (somatic autonomy). Correlation between the SIP68 and SIP was 0.94 overall; between the SIP68 and similar scales of the SF-36 correlations was moderate, and highest for physical health scales. We repeated the SIP68 development factor analysis and reproduced a structure of the full SIP that included 65 of SIP68 items. However, 36 additional items were retained that are not part of the SIP68. Overall, the SIP68 shows promise for use as a disability outcomes tool.
KW - Disabled persons
KW - Health status indicators
KW - Quality of life
KW - Questionnaires
KW - SIP
KW - SIP68
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U2 - 10.1023/A:1025036325886
DO - 10.1023/A:1025036325886
M3 - Article
C2 - 13677503
AN - SCOPUS:0041854238
SN - 0962-9343
VL - 12
SP - 583
EP - 595
JO - Quality of Life Research
JF - Quality of Life Research
IS - 5
ER -