Norton Leatherman Spine Center, Louisville, KY, USA.
Spine (Phila Pa 1976). 2011 Aug 15;36(18):E1240-4. doi: 10.1097/BRS.0b013e318204f987.
Cross sectional.
This study presents the factor analysis of the Spinal Appearance Questionnaire (SAQ) and its psychometric properties.
Although the SAQ has been administered to a large sample of patients with adolescent idiopathic scoliosis (AIS) treated surgically, its psychometric properties have not been fully evaluated. This study presents the factor analysis and scoring of the SAQ and evaluates its psychometric properties.
The SAQ and the Scoliosis Research Society-22 (SRS-22) were administered to AIS patients who were being observed, braced or scheduled for surgery. Standard demographic data and radiographic measures including Lenke type and curve magnitude were also collected.
Of the 1802 patients, 83% were female; with a mean age of 14.8 years and mean initial Cobb angle of 55.8° (range, 0°-123°). From the 32 items of the SAQ, 15 loaded on two factors with consistent and significant correlations across all Lenke types. There is an Appearance (items 1-10) and an Expectations factor (items 12-15). Responses are summed giving a range of 5 to 50 for the Appearance domain and 5 to 20 for the Expectations domain. The Cronbach's α was 0.88 for both domains and Total score with a test-retest reliability of 0.81 for Appearance and 0.91 for Expectations. Correlations with major curve magnitude were higher for the SAQ Appearance and SAQ Total scores compared to correlations between the SRS Appearance and SRS Total scores. The SAQ and SRS-22 Scores were statistically significantly different in patients who were scheduled for surgery compared to those who were observed or braced.
The SAQ is a valid measure of self-image in patients with AIS with greater correlation to curve magnitude than SRS Appearance and Total score. It also discriminates between patients who require surgery from those who do not.
横断面研究。
本研究对脊柱外观问卷（SAQ）进行了因子分析及其心理测量特性的研究。
尽管 SAQ 已在大量接受手术治疗的青少年特发性脊柱侧凸（AIS）患者中进行了评估，但尚未对其心理测量特性进行全面评估。本研究对 SAQ 进行了因子分析和评分，并对其心理测量特性进行了评估。
对接受观察、支具治疗或手术治疗的 AIS 患者进行了 SAQ 和脊柱侧凸研究协会 22 项问卷（SRS-22）的评估。还收集了标准的人口统计学数据和放射学测量指标，包括 Lenke 分型和曲线幅度。
在 1802 名患者中，83%为女性；平均年龄为 14.8 岁，初始 Cobb 角平均为 55.8°（范围为 0°-123°）。从 SAQ 的 32 个项目中，有 15 个项目与所有 Lenke 分型的相关性一致且具有统计学意义，分为两个因子。一个是外观（项目 1-10），另一个是预期因子（项目 12-15）。答案的总和为 5 到 50 分，用于外观域，5 到 20 分用于预期域。两个域和总得分的 Cronbach's α 分别为 0.88 和 0.81，外观和预期的测试-重测信度分别为 0.81 和 0.91。SAQ 外观和 SAQ 总分与主要曲线幅度的相关性高于 SRS 外观和 SRS 总分的相关性。与接受观察或支具治疗的患者相比，计划手术的患者的 SAQ 和 SRS-22 评分有统计学显著差异。
SAQ 是 AIS 患者自我形象的有效测量工具，与 SRS 外观和总分相比，与曲线幅度的相关性更高。它还可以区分需要手术的患者和不需要手术的患者。
