Dataset for "Kinematic evaluation of patients with chronic obstructive pulmonary disease during the 6-min walk test"

A total of 41 patients with COPD of both sexes were evaluated according to established criteria. The inclusion criteria were age ≥40 years, a smoking history of at least 10 pack-years, a post-bronchodilator forced expiratory volume in 1 s (FEV1)/forced vi- tal capacity (FVC) < 0.70 (GOLD, 2020), and no participation in a pulmonary rehabilitation programme in the last 3 months. The classification of airflow limitation severity was based on post-bronchodilator FEV1. Among the 41 patients with COPD who were evaluated for inclusion in the study, 5 were excluded due to difficulty walking (n = 2), reported osteoarticular disease (n = 2), and chronic oxygen use (n = 1); 36 participants remained for analysis. A control group comprising 19 participants matched for sex, age, weight, height, and body mass index (BMI) was also evaluated. To be included in this group, participants could not be considered “very active” according to the International Physical Activity Questionnaire (IPAQ). The 6MWT was performed in a 10-m long flat corridor (between-pylon distance = 9 m), which is the minimal walkway length for this test (Almeida et al., 2020; Beekman et al., 2014), according to methods developed in a feasibility study (Saraiva et al., 2018). During the test, Qualisys Track Motion 2.4 software (Qualisys, Gothenburg, Sweden) and a system of four infrared cameras (ProReflex MCU 240; Qualisys, Gothenburg, Sweden) were used for the three-dimensional capture of helmet movement (Y: medial-lateral, X: anteroposterior, Z: vertical height). As in the feasibility study (Saraiva et al., 2018), the acquisition system was calibrated before each session using the manufacturer's equipment (wand length = 749.4 mm), procedure, and soft- ware; calibrations were repeated when necessary until the measurement errors for the location of the helmet were <1.0mm in all directions.

本研究共纳入符合既定标准的41例男女慢性阻塞性肺疾病（COPD，Chronic Obstructive Pulmonary Disease）患者。纳入标准如下：年龄≥40岁，吸烟史不少于10包-年，支气管舒张后第1秒用力呼气容积（forced expiratory volume in 1 s, FEV1）/用力肺活量（forced vital capacity, FVC）<0.70（GOLD 2020），且近3个月内未参与肺康复计划。气流受限严重程度分级基于支气管舒张后FEV1数值。在41例接受本研究纳入筛选的COPD患者中，5例因行走困难（n=2）、报告骨关节疾病（n=2）及长期氧疗（n=1）被排除，最终剩余36例受试者用于后续数据分析。另设匹配性别、年龄、体重、身高及体质量指数（Body Mass Index, BMI）的19例受试者作为对照组并完成评估。该组纳入标准为：经国际体力活动问卷（International Physical Activity Questionnaire, IPAQ）评定，受试者不属于“极度活跃”人群。本研究参照可行性研究（Saraiva等，2018）确立的方法，在10米长的平直走廊（两标志物间距=9米，符合该试验的最小走道长度要求；Almeida等，2020；Beekman等，2014）中开展6分钟步行试验（6-minute walk test, 6MWT）。试验过程中，采用瑞典哥德堡Qualisys公司的Qualisys Track Motion 2.4软件，搭配4台ProReflex MCU 240红外摄像头系统，对受试者佩戴的头盔运动进行三维捕捉（Y轴：内外侧方向，X轴：前后方向，Z轴：垂直高度）。与前述可行性研究（Saraiva等，2018）一致，每次测试前均使用厂商提供的校准设备（杆长=749.4mm）、操作流程及配套软件对采集系统进行校准；必要时重复校准操作，直至头盔位置各方向的测量误差均小于1.0mm。