Reid Lauren, Thomson Penny, Besemann Markus, Dudek Nancy
Department of Medicine, Division of Physical Medicine and Rehabilitation, University of Ottawa, K1H 8M2 Ottawa, Canada.
J Rehabil Med. 2015 Mar;47(3):256-61. doi: 10.2340/16501977-1916.
Assessing a patient's ability to walk the distance required for community ambulation (at least 300 m) is important in amputee rehabilitation. During the 2-min walk test, most amputees cannot walk 300 m. Thus, the 6-min walk test may be preferred, but it has not been fully validated in this population. This study examined the convergent and discriminative validity of the 6-min walk test and assessed whether the 2-min test could predict the results of the 6-min test.
A total of 86 patients with unilateral or bilateral amputations at the Syme, transtibial, knee disarticulation or transfemoral level completed the 6-min walk test, 2-min walk test, Timed Up and Go test, Locomotor Capabilities Index version 5, Houghton Scale of Prosthetic Use, and Activity-Specific Balance Confidence scale.
The 6-min walk test correlated with the other tests (R = 0.57-0.95), demonstrating convergent validity. It demonstrated discriminative validity with respect to age, aetiology of amputation, and K-level (p < 0.0001). The 2-min walk test was highly predictive of the 6-min walk test distance (R2 = 0.91).
The 6-min walk test is a valid measure of amputee ambulation. However, the results suggest that it may not be necessary, since the 2-min walk test strongly predicts the 6-min walk test. Clinicians could therefore save time by using the shorter test.
评估患者行走社区活动所需距离（至少300米）的能力在截肢者康复中很重要。在2分钟步行测试中，大多数截肢者无法行走300米。因此，6分钟步行测试可能更受青睐，但尚未在该人群中得到充分验证。本研究检验了6分钟步行测试的收敛效度和区分效度，并评估2分钟测试是否能预测6分钟测试的结果。
共有86例在Syme、经胫骨、膝关节离断或经股骨水平进行单侧或双侧截肢的患者完成了6分钟步行测试、2分钟步行测试、定时起立行走测试、运动能力指数第5版、假肢使用霍顿量表和特定活动平衡信心量表。
6分钟步行测试与其他测试相关（R = 0.57 - 0.95），表明具有收敛效度。在年龄、截肢病因和K级方面显示出区分效度（p < 0.0001）。2分钟步行测试对6分钟步行测试距离具有高度预测性（R2 = 0.91）。
6分钟步行测试是评估截肢者行走能力的有效指标。然而，结果表明可能没有必要，因为2分钟步行测试能强烈预测6分钟步行测试。因此，临床医生使用较短的测试可以节省时间。
