Glasoe W M, Allen M K, Ludewig P M
Physiotherapy Associates, Cedar Rapids, Iowa 52401, USA.
J Orthop Sports Phys Ther. 2000 Oct;30(10):612-20; discussion 621-3. doi: 10.2519/jospt.2000.30.10.612.
Experimental design using 1-way analysis of variance and regression analysis to test the influence of 3 forefoot alignments on the dorsal mobility of the first ray.
To determine the effect of forefoot alignment on the magnitude of first ray dorsal mobility to an imposed load and to describe any association between forefoot alignment and age on dorsal mobility of the first ray.
Instability of the first ray has been implicated as a primary mechanical etiology of many foot problems. It has been proposed that a relationship exists between forefoot alignment and mobility of the first ray, with a varus aligned forefoot contributing to the development of an unstable first ray.
Sixty female (n = 34) and male (n = 26) subjects aged 18-77 were assigned into valgus, neutral, and varus foot groups (20 per group) based on a clinical measurement of forefoot alignment. A load cell device measured dorsal mobility of the first ray under a standard load of 55 N. Within-day repeat measures were taken from a subsample of subjects. In addition to reliability analysis, analysis of variance and regression analyses tested the relationship between forefoot alignment, age and sex, and mobility of the first ray.
The forefoot valgus group demonstrated significantly less dorsal mobility of the first ray than neutral or varus groups. The varus and neutral groups were not significantly different from one another. Forefoot alignment and sex were significant linear predictors (R2 = 0.40) of first ray dorsal mobility. Age had no significant association to dorsal mobility of the first ray.
Subjects having a valgus aligned forefoot had less dorsal excursion of the first ray than subjects having a neutral aligned forefoot. This investigation provides evidence supporting a relationship between forefoot alignment and mobility of the first ray.
采用单向方差分析和回归分析的实验设计，以测试三种前足对线方式对第一跖骨背侧活动度的影响。
确定前足对线对第一跖骨在施加负荷时背侧活动度大小的影响，并描述前足对线与年龄对第一跖骨背侧活动度之间的任何关联。
第一跖骨不稳定被认为是许多足部问题的主要机械病因。有人提出前足对线与第一跖骨活动度之间存在关系，前足内翻会导致第一跖骨不稳定的发展。
根据前足对线的临床测量，将60名年龄在18 - 77岁的女性（n = 34）和男性（n = 26）受试者分为外翻足、中立足和内翻足组（每组20人）。一个测力传感器装置在55 N的标准负荷下测量第一跖骨的背侧活动度。对部分受试者进行了日内重复测量。除可靠性分析外，方差分析和回归分析测试了前足对线、年龄和性别与第一跖骨活动度之间的关系。
前足外翻组第一跖骨的背侧活动度明显低于中立组或内翻组。内翻组和中立组之间无显著差异。前足对线和性别是第一跖骨背侧活动度的显著线性预测因子（R2 = 0.40）。年龄与第一跖骨背侧活动度无显著关联。
前足外翻的受试者第一跖骨的背侧偏移比前足中立的受试者少。本研究提供了支持前足对线与第一跖骨活动度之间关系的证据。
