de Bruin A F, Buys M, de Witte L P, Diederiks J P
Department of Medical Sociology, University of Limburg, Maastricht, The Netherlands.
J Clin Epidemiol. 1994 Aug;47(8):863-71. doi: 10.1016/0895-4356(94)90189-9.
In previous research a short version of the Sickness Impact Profile (SIP136) was developed, containing 68 items. This SIP68 is intended as a short generic alternative to the original SIP. High reliability of the SIP68 was reported when it was extracted from the SIP136. This paper is a report on the first reliability testing of the SIP68 administered as an independent instrument without the context of the SIP136. To establish the test-retest reliability and the internal consistency of the new instrument, 51 patients of an outpatient department of rheumatology completed the SIP68 twice, with an interval of 48 hours. To compare the performance of the independent SIP68 with the SIP68 extracted from the SIP136, the SIP136 also was completed two times by the same 51 respondents. Test-retest reliability for both administration types was assessed by means of the intraclass correlation coefficient and the Jaccard's similarity ratio. Internal consistency was assessed by means of Cronbach's alpha. The reliability appears to be high in both the independent SIP68 as well as the extracted SIP68. Moreover, the reliability of the independent SIP68 appears to be as high as for the SIP136. These findings were very encouraging, indicating that the SIP68 may very well serve as a generic alternative to the SIP136.
在先前的研究中，开发了疾病影响量表的一个简短版本（SIP136），包含68个条目。这个SIP68旨在作为原始SIP的一个简短通用替代版本。据报道，当从SIP136中提取SIP68时，其具有较高的信度。本文是关于SIP68作为一个独立工具（不依托SIP136背景）进行首次信度测试的报告。为了确定新工具的重测信度和内部一致性，51名风湿病门诊患者在间隔48小时的情况下完成了两次SIP68测试。为了比较独立的SIP68与从SIP136中提取的SIP68的性能，这51名受访者同样完成了两次SIP136测试。两种施测类型的重测信度通过组内相关系数和雅卡尔相似比进行评估。内部一致性通过克朗巴哈α系数进行评估。独立的SIP68以及提取的SIP68的信度似乎都很高。此外，独立的SIP68的信度似乎与SIP136一样高。这些发现非常鼓舞人心，表明SIP68很可能可以很好地作为SIP136的通用替代版本。
