a General Practice, School of Medicine , Flinders University , Adelaide , Australia.
Psychol Health. 2014;29(5):517-35. doi: 10.1080/08870446.2013.863885. Epub 2013 Dec 16.
Key psychometric information was sought for three newly derived dimensions from an abridged Illness Behaviour Questionnaire (IBQ-31): Affirmation of Illness (AI), Concern for Health (CH) and General Affective State (GAS). The construct validity of these scales was examined along with their test-retest reliability and long-term stability.
A longitudinal, observational study was conducted with 675 participants (general community members and those with either asthma, diabetes and chronic pain or chronic fatigue syndrome) providing self-report questionnaire data at baseline, with additional information sought at three (n = 483; 71.6%) and 12 months (n = 517, 76.6%).
Construct validity of the IBQ-31 was explored using well-validated psychological measures of Symptom Attributions and Symptom Experience, Cognitive Distortion of Somatic Information and Illness Likelihood.
In general, AI, CH and GAS shared predictable empirical overlap with related psychological indices across the five samples. Adequate three-month test-retest reliability was evident, with greater score variability over 12 months.
The IBQ-31 comprises three theoretically relevant dimensions which demonstrate relative short- and long-term stability for individuals with diverse illness experiences. Future investigations should explore the predictive validity of AI, CH and GAS, along with the potential value of 'cut-off' scores for clinical use.
寻求从简化的疾病行为问卷（IBQ-31）中得出的三个新维度的关键心理计量学信息：疾病肯定（AI）、健康关注（CH）和一般情感状态（GAS）。这些量表的构念效度以及它们的重测信度和长期稳定性也进行了检验。
一项纵向观察性研究共纳入 675 名参与者（普通社区成员以及患有哮喘、糖尿病、慢性疼痛或慢性疲劳综合征的人群），在基线时提供自我报告问卷数据，并在 3 个月（n=483，71.6%）和 12 个月（n=517，76.6%）时进一步收集信息。
使用经过充分验证的心理测量方法，如症状归因和症状体验、躯体信息认知扭曲和疾病可能性，探讨 IBQ-31 的构念效度。
总体而言，AI、CH 和 GAS 在五个样本中与相关心理指标具有可预测的经验重叠。三个月的重测信度较好，12 个月时的评分变异性更大。
IBQ-31 包含三个理论上相关的维度，这些维度在具有不同疾病体验的个体中具有相对短期和长期的稳定性。未来的研究应探讨 AI、CH 和 GAS 的预测效度，以及用于临床的“截断”分数的潜在价值。
