National Research Centre for the Working Environment, Lersø Parkalle 105, DK 2100 Copenhagen Ø, Denmark.
BMC Musculoskelet Disord. 2012 Feb 22;13:28. doi: 10.1186/1471-2474-13-28.
Low back pain (LBP) and leisure time physical activity (LTPA) are considered to be closely related, and clinical guidelines for the treatment of acute LBP recommend patients stay physically active. However, the documentation for this recommendation is sparse and based on studies involving patient populations. The purpose of the study was (1) to investigate the correlation between LBP and LTPA on a weekly basis over the course of a year in a high-risk group of cleaners; and (2) to investigate if maintaining LTPA during an episode of acute LBP has a positive effect on LBP intensity in the subsequent 4 weeks.
188 cleaners consented to participate in a 52-week text message survey about hours of LTPA and intensity of LBP (from 0 to 9) over the previous 7 days. The correlation between LBP and LTPA was calculated by Pearson correlation coefficient. During an episode of acute LBP, a mixed effect logistic regression model was used to investigate whether cleaners who maintain LTPA have a lower pain intensity and higher probability of returning to initial pain intensity within the following four weeks compared with cleaners who decrease LTPA during acute LBP.
The correlation between weekly LTPA and LBP data was negative, but numerically low (r = -0.069) and statistically insignificant (p = 0.08). Among the 82 cleaners experiencing at least one episode of acute LBP, those maintaining LTPA during an episode of acute LBP did not have a lower pain intensity (average LBP intensity difference between groups of 0.06; 95% confidence interval (95% CI) of -0.417 to 0.539) or higher probability of returning to initial pain level (Odds ratio 1,02; 95% CI of 0.50 to 2.09) in the following four weeks compared with cleaners decreasing LTPA during acute LBP.
Hours of LTPA and intensity of LBP measured on a weekly basis throughout a year showed no close correlation. Maintaining LTPA during an episode of acute LBP did not result in a positive effect on LBP in the following 4 weeks. Documentation of LTPA recommendations for acute LBP in working populations is still needed.
下腰痛（LBP）和休闲时间体力活动（LTPA）被认为密切相关，治疗急性 LBP 的临床指南建议患者保持身体活跃。然而，这一建议的依据很少，而且是基于涉及患者人群的研究。本研究的目的是：（1）在一年内，在高危清洁工群体中，每周调查 LBP 和 LTPA 之间的相关性；（2）调查在急性 LBP 发作期间保持 LTPA 是否对随后 4 周的 LBP 强度有积极影响。
188 名清洁工同意参加一项为期 52 周的短信调查，内容涉及过去 7 天内 LTPA 时间和 LBP 强度（0-9 级）。通过皮尔逊相关系数计算 LBP 和 LTPA 之间的相关性。在急性 LBP 发作期间，采用混合效应逻辑回归模型，调查在急性 LBP 期间保持 LTPA 的清洁工与减少 LTPA 的清洁工相比，其疼痛强度是否更低，以及在接下来的 4 周内回到初始疼痛强度的可能性是否更高。
每周 LTPA 和 LBP 数据之间的相关性为负，但数值较低（r=-0.069）且无统计学意义（p=0.08）。在 82 名经历过至少一次急性 LBP 发作的清洁工中，在急性 LBP 发作期间保持 LTPA 的清洁工疼痛强度（两组之间的平均 LBP 强度差异为 0.06；95%置信区间（95%CI）为-0.417 至 0.539）或回到初始疼痛水平的可能性（比值比 1.02；95%CI 为 0.50 至 2.09）均无明显降低。
在一年中每周测量的 LTPA 时间和 LBP 强度之间没有密切相关性。在急性 LBP 发作期间保持 LTPA 并不能在接下来的 4 周内对 LBP 产生积极影响。仍需要为工作人群中的急性 LBP 记录 LTPA 建议。
