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Effectiveness of treatments for acute and subacute mechanical non-specific low back pain: a systematic review with network meta-analysis [with consumer summary]
Gianola S, Bargeri S, del Castillo G, Corbetta D, Turolla A, Andreano A, Moja L, Castellini G
British Journal of Sports Medicine 2022 Jan;56(1):41-50
systematic review

OBJECTIVE: To assess the effectiveness of interventions for acute and subacute non-specific low back pain (NS-LBP) based on pain and disability outcomes. DESIGN: A systematic review of the literature with network meta-analysis. DATA SOURCES: Medline, Embase and CENTRAL databases were searched from inception until 17 October 2020. ELIGIBILITY CRITERIA FOR SELECTING STUDIES: Randomised clinical trials (RCTs) involving adults with NS-LBP who experienced pain for less than 6 weeks (acute) or between 6 and 12 weeks (subacute). RESULTS: Forty-six RCTs (n = 8,765) were included; risk of bias was low in 9 trials (19.6%), unclear in 20 (43.5%), and high in 17 (36.9%). At immediate-term follow-up, for pain decrease, the most efficacious treatments against an inert therapy were: exercise (standardised mean difference (SMD) -1.40; 95% confidence interval (CI) -2.41 to -0.40), heat wrap (SMD -1.38; 95% CI -2.60 to -0.17), opioids (SMD -0.86; 95% CI -1.62 to -0.10), manual therapy (SMD -0.72; 95% CI -1.40 to -0.04) and non-steroidal anti-inflammatory drugs (NSAIDs) (SMD -0.53; 95% CI -0.97 to -0.09). Similar findings were confirmed for disability reduction in non-pharmacological and pharmacological networks, including muscle relaxants (SMD -0.24; 95% CI -0.43 to -0.04). Mild or moderate adverse events were reported in the opioids (65.7%), NSAIDs (54.3%) and steroids (46.9%) trial arms. CONCLUSION: With uncertainty of evidence, NS-LBP should be managed with non-pharmacological treatments which seem to mitigate pain and disability at immediate-term. Among pharmacological interventions, NSAIDs and muscle relaxants appear to offer the best harm-benefit balance.
Reproduced with permission from the BMJ Publishing Group.

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