Department of Statistics, Orebro University, Orebro, Sweden.
Spine (Phila Pa 1976). 2009 Aug 15;34(18):1976-83. doi: 10.1097/BRS.0b013e3181b07d6a.
A prospective validation study.
To validate the Balanced Inventory for Spinal Disorders (BIS), a questionnaire concerning the extent to which pain affects perceived physical health, social life, mental health, and quality of life. The operational definitions of the items and the verbal descriptive scales were compared with corresponding items in the Short-Form 36 (SF-36), European Quality of Life Scale (EQ), and Oswestry Disability Index (ODI).
In validation studies, scales that intend to measure the same variable are compared.
The SF-36, EQ, ODI, and the BIS were filled in by 101 patients before surgical treatment. The comparisons were analyzed by statistical methods that take account of the nonmetric properties of ordered categorical data to obtain reliable results. The level of order-consistency between BIS and comparing items, when present, was calculated. The Spearman rank-order correlation coefficient was also calculated.
In the paired comparisons between the BIS pain scales and the other pain scales about 80% units more pairs were ordered than disordered, and the disorder was explained by the discriminating ability of the BIS back and leg pain items. The BIS and ODI items of limitation in walking were comparable, and the assessments of social limitations on the questionnaires were consistent; the disordered pairs being explained by different coverage of activities in the items. The assessments of physical and mental health on BIS were disordered, with the responses in SF-36 in favor of the BIS type of scale categories. The few items and response categories in the EQ did not discriminate the assessments.
The BIS assessments can be regarded as being a valid disease-specific questionnaire that provides interpretable information regarding the impact of back end leg pain on well-defined physical, social and mental aspects, and on the quality of life.
前瞻性验证研究。
验证平衡脊柱障碍问卷（BIS），该问卷涉及疼痛对感知身体健康、社会生活、心理健康和生活质量的影响程度。项目的操作定义和口头描述量表与简短 36 项健康调查（SF-36）、欧洲生活质量量表（EQ）和 Oswestry 残疾指数（ODI）的相应项目进行了比较。
在验证研究中，比较了旨在测量相同变量的量表。
101 例患者在手术治疗前填写了 SF-36、EQ、ODI 和 BIS。通过考虑有序分类数据的非度量特性的统计方法对比较进行分析，以获得可靠的结果。计算了 BIS 与比较项目之间存在的有序一致性水平，并计算了 Spearman 等级相关系数。
在 BIS 疼痛量表与其他疼痛量表的配对比较中，大约 80%的配对是有序的，而无序的配对则可以用 BIS 腰背和腿部疼痛项目的辨别能力来解释。BIS 和 ODI 的行走受限项目具有可比性，问卷对社会限制的评估是一致的；无序的配对可以用项目中活动的不同覆盖范围来解释。BIS 对身心健康的评估是无序的，SF-36 的反应倾向于 BIS 类型的量表类别。EQ 中的项目和反应类别较少，无法区分评估结果。
BIS 评估可以被视为一种有效的疾病特异性问卷，它提供了关于腰背腿部疼痛对明确的身体、社会和心理方面以及生活质量的影响的可解释信息。
