Ingersgaard Marianne Vie, Grabowski Dan, Olesen Kasper
Steno Diabetes Center Copenhagen, Health Promotion Research, Borgmester Ib Juuls Vej 83, 2730, Herlev, Denmark.
National Institute of Public Health, Faculty of Health Sciences, University of Southern Denmark, Studiestræde 6, 1455, Copenhagen, Denmark.
Heliyon. 2022 Mar 16;8(3):e09109. doi: 10.1016/j.heliyon.2022.e09109. eCollection 2022 Mar.
The Illness Identity Questionnaire (IIQ) captures the ways in which individuals integrate chronic illness into their identity. The objectives were to linguistically validate and culturally adapt a Danish language version of the IIQ, and to evaluate the psychometric properties of this Danish version.
IIQ was adapted through a forward-backward translation process, content validity assessment, and cognitive interviews (n = 5). Data for psychometric analysis were collected through an online Danish version of the IIQ (IIQ-DK). Data quality, internal consistency, and item correlations were assessed. Confirmatory factor analyses (CFA) were conducted.
Cognitive interviews resulted in re-wordings of two items. 1176 adolescents and emerging adults (15-26 years) with type 1 diabetes completed the IIQ-DK. Floor and ceiling effects were demonstrated for most items. Analysis showed good internal consistency of scales, as well as internal and discriminant item validity. CFA fit statistics after including correlated residuals were good for all scales. CFA showed acceptably high factor loadings for all items except one.
Results demonstrated good reliability and psychometric properties of the IIQ-DK, which may be forwarded to use in research and clinical practice as a robust instrument to measure illness identity in adolescents and emerging adults with type 1 diabetes.
疾病身份问卷（IIQ）旨在了解个体将慢性病融入自身身份的方式。本研究旨在对IIQ丹麦语版本进行语言验证和文化调适，并评估该丹麦语版本的心理测量特性。
通过前后翻译过程、内容效度评估和认知访谈（n = 5）对IIQ进行调适。通过IIQ丹麦语在线版本（IIQ-DK）收集心理测量分析数据。评估数据质量、内部一致性和项目相关性，并进行验证性因子分析（CFA）。
认知访谈导致两个项目重新措辞。1176名1型糖尿病青少年和青年（15 - 26岁）完成了IIQ-DK。大多数项目显示出地板效应和天花板效应。分析表明量表具有良好的内部一致性，以及项目的内部效度和区分效度。纳入相关残差后的CFA拟合统计量对所有量表都很好。CFA显示除一个项目外，所有项目的因子载荷都高得可以接受。
结果表明IIQ-DK具有良好的信度和心理测量特性，可用于研究和临床实践，作为测量1型糖尿病青少年和青年疾病身份的有力工具。
