Association of objectively measured occupational walking and standing still with low back pain: a cross-sectional study
这项横断面研究用加速度计客观测量了187名蓝领工人的工作步行和站立时间，发现步行多的人腰背痛强度低，但站立与腰背痛的关系不明确。
OBJECTIVES: This cross-sectional study investigated the association of objectively measured walking and standing still time at work with low back pain (LBP) intensity among blue-collar workers. DESIGN: A cross-sectional study. METHODS: 187 workers attached two accelerometers for diurnal standing still and walking measurements, which were categorised using tertiles. Workers' self-reported LBP intensity (scale 0-9) was categorised into low (0-5) and high pain (6-9). RESULTS: Of the 187 workers, 17% reported a high level of LBP. Results of the multi-adjusted logistic regression analysis demonstrated a negative association between walking and high LBP intensity (OR 0.24 CL 95% 0.07 to 0.79). The results between standing still and high LBP intensity were mixed and non-significant. CONCLUSION: Blue-collar workers who walk more at work tend to have low LBP. These results should be verified using objective measures in a prospective design. Practitioner Summary: Most studies on the association of occupational walking and standing still with LBP have used poor self-reported measures. This study investigated the association of objectively measured time spent walking and standing still at work with LBP among blue-collar workers. A significant negative association between walking and LBP was found. However, because of the cross-sectional design, these results should be further investigated in prospective studies.