A population-based, randomized clinical trial on back pain management. Physical performance, pain, pain behavior and subjective disability in patients with subacute low back pain.
Population-based randomized clinical trial.
                To develop and test a model of management of subacute back pain, to prevent prolonged disability.
                The present management of back pain seems inadequate, and development of innovative models has been urged.
                A model for the treatment of subacute work-related back pain has been developed and evaluated in a population-based randomized clinical trial. Workers (n = 130) from eligible workplaces in the Sherbrooke area (N = 31), who had been absent from work for more than 4 weeks for back pain, were randomized, based on their workplace, in one of four treatment groups: usual care, clinical intervention, occupational intervention, and full intervention (a combination of the last two). The duration of absence from regular work and from any work was evaluated using survival analysis. Functional status and pain were compared at study entry and after 1 year of follow-up.
                The full intervention group returned to regular work 2.41 times faster than the usual care intervention group (95% confidence interval 1.19-4.89; P < 0.01). The specific effect of the occupational intervention accounted for the most important part of this result, with a rate ratio of return to regular work of 1.91 (95% confidence interval = 1.18-3.10; P < 0.01). Pain and disability scales demonstrated either a statistically significant reduction or a trend toward reduction in the three intervention groups, compared with the trend in the usual care intervention group.
                Close association of occupational intervention with clinical care is of primary importance in impeding progression toward chronicity of low back pain. The aim of this paper was to study the physical performance, pain, pain behavior and disability in patients with subacute low back pain (LBP). The patients were blue-collar workers and had been sick-listed for 8 weeks due to subacute low back pain. A total of 103 patients were randomized, 51 of them to the intervention group and the other to a control group. Recordings of physical performance and complaints of LBP were done before and after treatment in the intervention group. The proportion of patients with no complaints of LBP was significantly greater in the intervention group than in the control group at the one-year follow-up. The patients who intra-individually improved their physical performance also intra-individually decreased their complaints of LBP. The intra-individual improvements were suggested to be important for the individual return to work.
We conclude that there is moderate evidence of positive effectiveness of multidisciplinary rehabilitation for subacute low back pain and that a workplace visit increases the effectiveness. But because this evidence is based on trials that had some methodological shortcomings, and several expensive multidisciplinary rehabilitation programmes are commonly used for uncomplicated/non-specific subacute low back problems, there is an obvious need for high quality trials in this field.