The National Research Centre for the Working Environment, Lersø Parkallé 105, 2100 Copenhagen, Denmark. E-mail:
Scand J Work Environ Health. 2024 Dec 1;50(8):613-621. doi: 10.5271/sjweh.4186. Epub 2024 Sep 12.
This study aimed to investigate whether physical work demands modify the effect of the selfBACK app, which is designed to support self-management of low-back pain.
In a secondary analysis of the selfBACK trial with 346 employed participants, we stratified into low (N=165) and high physical work demands (N=181). Outcomes included the Roland-Morris Disability Questionnaire (0-24), a numeric rating scale for low-back pain intensity (0-10), the Pain Self-Efficacy Questionnaire (0-60), and work ability (0-10). Intervention effects were assessed at three- and nine-month follow-ups using a linear mixed model.
At three months, high physical demand workers with selfBACK showed a significant reduction in pain intensity [-0.8, 95% confidence interval (CI) -1.3- -0.2] compared to usual care. By nine months, the high physical demands workers with selfBACK reported reduced pain-related disability (-1.4, 95% CI -2.7- -0.1), improved pain self-efficacy (3.5, 95% CI 0.9-6.0), and lower pain intensity (-1.0, 95% CI -1.6- -0.4) compared to usual care. Low physical demands workers with selfBACK also improved pain self-efficacy [2.8 (95% CI 0.3-5.3)] compared to usual care. The impact of selfBACK was more noticeable among workers with high physical demands compared to their low physical demand counterparts, but no statistically significant differences were found in any outcome.
The selfBACK intervention had consistent effects across workers with high and low physical work demands, indicating that these demands did not modify its impact. Both groups experienced similar positive effects, highlighting the intervention's effectiveness across varying levels of physical work demands.
本研究旨在探讨体力工作需求是否会改变自我 BACK 应用程序的效果，该应用程序旨在支持腰痛的自我管理。
在自我 BACK 试验的二次分析中，我们对 346 名在职参与者进行了分层，分为低体力工作需求（N=165）和高体力工作需求（N=181）。结果包括 Roland-Morris 残疾问卷（0-24）、腰痛强度数字评分量表（0-10）、疼痛自我效能问卷（0-60）和工作能力（0-10）。使用线性混合模型在三个月和九个月的随访中评估干预效果。
在三个月时，与常规护理相比，高体力需求工人使用自我 BACK 后疼痛强度显著降低[0.8，95%置信区间（CI）-1.3- -0.2]。到九个月时，高体力需求工人使用自我 BACK 后报告疼痛相关残疾减轻（-1.4，95% CI -2.7- -0.1），疼痛自我效能提高（3.5，95% CI 0.9-6.0），疼痛强度降低（-1.0，95% CI -1.6- -0.4）与常规护理相比。低体力需求工人使用自我 BACK 后疼痛自我效能也有所提高[2.8（95% CI 0.3-5.3）]与常规护理相比。自我 BACK 的影响在高体力需求工人中比在低体力需求工人中更为明显，但在任何结果中都没有发现统计学上的显著差异。
自我 BACK 干预在高体力和低体力工作需求的工人中均产生一致的效果，表明这些需求并未改变其影响。两组工人都经历了类似的积极效果，突显了该干预措施在不同体力工作需求下的有效性。
