Abstract
BackgroundThe Impact of Cancer version 2 (IOCv2) was designed to assess the physical and psychosocial health experience of cancer survivors through its positive and negative impacts. Although the IOCv2 is available in English and Dutch, it has not yet been validated for use in French-speaking populations. The current study was undertaken to provide a comprehensive assessment of the reliability and validity of the French language version of the IOCv2 in a sample of breast cancer survivors.MethodsAn adapted French version of the IOCv2 as well as demographic and medical information were completed by 243 women to validate the factor structure divergent/divergent validities and reliability. Concurrent validity was assessed by correlating the IOCv2 scales with measures from the SF-12, PostTraumatic Growth Inventory and Fear of Cancer Recurrence Inventory.ResultsThe French version of the IOCv2 supports the structure of the original version, with four positive impact dimensions and four negative impact dimensions. This result was suggested by the good fit of the confirmatory factor analysis and the adequate reliability revealed by Cronbach's alpha coefficients and other psychometric indices. The concurrent validity analysis revealed patterns of association between IOCv2 scale scores and other measures.Unlike the original version, a structure with a Positive Impact domain consisting in the IOCv2 positive dimensions and a Negative Impact domain consisting in the negative ones has not been clearly evidenced in this study. The limited practical use of the conditional dimensions Employment Concerns and Relationship Concerns, whether the patient is partnered or not, did not make possible to provide evidence of validity and reliability of these dimensions as the subsets of sample to work with were not large enough. The scores of these conditional dimensions have to be used with full knowledge of the facts of this limitation of the study.ConclusionsIntegrating IOCv2 into studies will contribute to evaluate the psychosocial health experience of the growing population of cancer survivors, enabling better understanding of the multi-dimensional impact of cancer.
Highlights
The Impact of Cancer version 2 (IOCv2) was designed to assess the physical and psychosocial health experience of cancer survivors through its positive and negative impacts
The IOCv2 questionnaire The Impact of Cancer version 2 (IOCv2) is a 47-item questionnaire organized into 4 positive (altruism and empathy (AE), health awareness (HA), meaning of cancer (MOC), positive self-evaluation (PSE)) and 4 negative (appearance concerns (AC), body change concerns (BCC), life interference (LI) and worry (W)) impact dimensions [13] corresponding to the first 37 items
This study examines the psychometric properties of this second version of the French translation and adaptation of the IOCv2 in a breast cancer survivor sample
Summary
The Impact of Cancer version 2 (IOCv2) was designed to assess the physical and psychosocial health experience of cancer survivors through its positive and negative impacts. Cancer-specific quality of life (QOL) instruments (eg: EORTC QLQ-C30 [8] and FACT-G [9]) were originally developed to assess the situation of patients during and shortly after treatment, and primarily in the context of clinical trials These questionnaires mainly focused on acute treatment effects (nausea, fatigue, pain, insomnia) and the psychosocial effects of being diagnosed with and treated for cancer in the short term. As patients shift into the post-primary treatment survivorship phase, other issues become or more salient For this reason, a number of questionnaires have been developed for assessing the physical and psychosocial health experience of cancer survivors, including the Quality of Life in Adult Cancer Survivors (QLACS) [10], the Quality of Life-Cancer Survivors (QOL-CS) [11] and the Impact Of Cancer (IOC) [12]. The IOC questionnaire is the only instrument that focuses on the positive as well as the negative impacts of the disease on quality of life that long-term survivors attribute to their cancer experience
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