Department of Physical Therapy, University of Pittsburgh, 6035 Forbes Tower, Pittsburgh, PA 15260, USA.
Phys Ther. 2011 Sep;91(9):1367-76. doi: 10.2522/ptj.20100291. Epub 2011 Jun 30.
Individuals with rheumatoid arthritis (RA) often are sedentary and have an increased risk of developing comorbid conditions. Women with RA are more likely to experience challenges in maintaining an active lifestyle over their life span than men with RA or people who are healthy. As the benefits of physical activity (PA) are well known, measuring PA accurately in this population is important.
The purposes of this study were: (1) to characterize PA as measured with the SenseWear Armband (SWA) in women with RA and (2) to determine the measurement time frame to obtain consistent estimates of PA and daily energy expenditure (EE) in women with RA.
This was a cross-sectional study.
Participants wore the SWA for 7 days. Measurements of daily total energy expenditure (TEE), physical activity energy expenditure (PAEE) during activities at or above 1 metabolic equivalent (MET) level (PAEE≥1MET), PAEE during activities at or above 2 METs (PAEE≥2METs), PAEE during activities at or above 3 METs (PAEE≥3METs), and number of steps were obtained.
Fifty-three women participated. Complete data were obtained for 47 participants (89%). Daily usage of the SWA was 98% of the time (23:31 hours/24 hours). Means (SD) were 2,099 (340) kcal/d for TEE, 1,050 (331) kcal/d for PAEE≥1MET, 642 (309) kcal/d for PAEE≥2METs, 239 (178) kcal/d for PAEE≥3METs, and 7,260 (2,710) for number of steps. Results of intraclass correlation coefficient analyses and multiple linear regressions indicated that 2 days were needed to reliably estimate TEE; 3 days for PAEE≥1MET, PAEE≥2METs, and number of steps; and 4 days for PAEE≥3METs.
The sample was composed of well-educated women with RA who had mild to moderate difficulty performing daily activities.
The SWA may be useful to quantify PA in women with RA and to monitor effectiveness of interventions aiming to increase PA levels. Minimizing the number of days necessary for data collection will reduce the individual's burden and may improve adherence in studies of PA behaviors.
类风湿关节炎（RA）患者通常久坐不动，并且有更高的合并症风险。与 RA 男性患者或健康人群相比，RA 女性患者在整个生命周期中更有可能面临维持积极生活方式的挑战。由于身体活动（PA）的益处众所周知，因此准确测量该人群的 PA 非常重要。
本研究的目的是：（1）用 SenseWear 臂带（SWA）描述 RA 女性的 PA；（2）确定测量时间范围，以获得 RA 女性 PA 和日常能量消耗（EE）的一致估计值。
这是一项横断面研究。
参与者佩戴 SWA 7 天。测量每日总能量消耗（TEE）、活动时达到或超过 1 代谢当量（MET）水平（PAEE≥1MET）的 PA 能量消耗、活动时达到或超过 2 METs（PAEE≥2METs）的 PA 能量消耗、活动时达到或超过 3 METs（PAEE≥3METs）的 PA 能量消耗和步数。
共有 53 名女性参与。47 名参与者（89%）获得完整数据。SWA 的每日使用率为 98%（23:31 小时/24 小时）。TEE 的平均值（标准差）为 2099（340）千卡/天，PAEE≥1MET 为 1050（331）千卡/天，PAEE≥2METs 为 642（309）千卡/天，PAEE≥3METs 为 239（178）千卡/天，步数为 7260（2710）。组内相关系数分析和多元线性回归结果表明，需要 2 天才能可靠估计 TEE；3 天用于 PAEE≥1MET、PAEE≥2METs 和步数；4 天用于 PAEE≥3METs。
该样本由受过良好教育的 RA 女性组成，她们在进行日常活动方面有轻度至中度困难。
SWA 可用于量化 RA 女性的 PA，并监测旨在提高 PA 水平的干预措施的效果。减少数据收集所需的天数将减轻个人负担，并可能提高 PA 行为研究的依从性。
