Centro di Riferimento Oncologico, National Cancer Institute, Aviano, Italy.
Support Care Cancer. 2013 Dec;21(12):3355-62. doi: 10.1007/s00520-013-1909-1. Epub 2013 Aug 3.
The Impact of Cancer Scale (IOC) is a self-assessment tool designed to capture the unique and multidimensional aspects of the quality of life of long-term cancer survivors. This paper describes the adaptation and psychometric evaluation of its Italian version.
After the adaptation (i.e., removal of nonpertinent items and back-translation procedure), the Italian version of IOC has been administered to a sample of Italian long-term cancer survivors (people free from cancer and its treatments for at least 5 years) together with the Short Form 36 Health Survey Questionnaire, the European Organization for Research and Treatment of Cancer Quality of Life Questionnaire Core 30, and the Post-Traumatic Growth Inventory.
Data on 304 participants were analyzed. Exploratory factor analysis revealed a three-factor structure composed of Uncertainty/Worry about Health & Future (13 items), Personal Growth & Altruism (14 items), and Dissatisfaction & Life Interferences (10 items). Internal consistency (Cronbach's alpha, >0.77) and temporal stability (Spearman's rho, >0.70) were good for all three factors. The obtained three factors correlated with the theoretically pertinent subscales of the other administered tools. To facilitate cross-cultural comparisons, reliability and convergent/divergent validity data for the eight-factor IOC structure already described in literature (Impact of Cancer Version 2) have been also provided.
This study supports the use of the IOC in Italy as a trifactorial instrument that is able to isolate aspects characteristic of the condition of long-term cancer survivorship. However, subsequent studies are needed to confirm these findings as well as shed more light on the validity of the IOC construct and its cultural variability.
癌症量表（IOC）是一种自我评估工具，旨在捕捉长期癌症幸存者生活质量的独特和多维方面。本文描述了其意大利版本的改编和心理测量评估。
改编后（即删除不相关的项目和回译程序），意大利版 IOC 与简短的 36 健康调查问卷、欧洲癌症研究与治疗组织核心 30 个生活质量问卷和创伤后成长清单一起，对意大利长期癌症幸存者（癌症及其治疗至少 5 年无病）样本进行了评估。
对 304 名参与者的数据进行了分析。探索性因素分析显示，该结构由三个因素组成，包括健康和未来的不确定性/担忧（13 项）、个人成长和利他主义（14 项）以及不满和生活干扰（10 项）。所有三个因素的内部一致性（Cronbach's alpha，>0.77）和时间稳定性（Spearman's rho，>0.70）都很好。获得的三个因素与其他管理工具的理论相关子量表相关。为了促进跨文化比较，还提供了文献中已经描述的 IOC 的八因素结构（癌症版本 2）的可靠性和收敛/发散有效性数据。
本研究支持在意大利使用 IOC 作为一种能够分离出长期癌症生存状况特征的三分量工具。然而，还需要进一步的研究来证实这些发现，并进一步阐明 IOC 结构的有效性及其文化变异性。
