Selman Jessyca Pr, de Camargo Anderson A, Santos Jenifer, Lanza Fernanda C, Dal Corso Simone
Postgraduate Program in Rehabilitation Sciences, Universidade Nove de Julho (UNINOVE), São Paulo, Brazil.
Respir Care. 2014 Apr;59(4):525-30. doi: 10.4187/respcare.02649. Epub 2013 Aug 6.
The 2-min walk test (2MWT) has been used in several health conditions, but the interpretation of its results is limited due to a lack of reference values. The aim of this study was to establish a reference equation to predict the distance walked (DW) in the 2MWT for healthy adults and the elderly and to test its reproducibility.
We evaluated 390 healthy subjects (195 male), 18-89 y old, with normal spirometry and no history of previous chronic diseases. Two 2MWTs were performed on the same day, 30 min apart. To test the reliability of the prediction equation, 70 subjects (35 male) were prospectively included in the study.
Men walked farther than women (221 [202-240] vs 199 [164-222] m, respectively; P < .0001). Significant correlations were observed between DW and age (r = -0.50), weight (r = 0.23), height (r = 0.40), and gender (r = 0.35) (P < .001 for all). Age and gender persisted in the model to predict DW (R(2) = 0.51). There was no difference between the DW by the subjects (197 [182-216] m) and that estimated by the prediction equation (197 [179-222] m) (P = .68).
We established a prediction equation that may be used as a reference to interpret performance on the 2MWT of adults and the elderly with different health conditions.
2分钟步行试验（2MWT）已用于多种健康状况，但由于缺乏参考值，其结果的解读受到限制。本研究的目的是建立一个参考方程，以预测健康成年人和老年人在2MWT中的步行距离（DW），并测试其可重复性。
我们评估了390名健康受试者（195名男性），年龄在18 - 89岁之间，肺功能正常且无既往慢性病病史。在同一天进行两次2MWT，间隔30分钟。为了测试预测方程的可靠性，前瞻性纳入了70名受试者（35名男性）进行研究。
男性比女性走得更远（分别为221[202 - 240]米和199[164 - 222]米；P <.0001）。观察到DW与年龄（r = -0.50）、体重（r = 0.23）、身高（r = 0.40）和性别（r = 0.35）之间存在显著相关性（所有P <.001）。年龄和性别在预测DW的模型中仍然存在（R(2)=0.51）。受试者的DW（197[182 - 216]米）与预测方程估计的DW（197[179 - 222]米）之间没有差异（P =.68）。
我们建立了一个预测方程，可作为解读不同健康状况的成年人和老年人2MWT表现的参考。
