Physiotherapy for pain: a meta-epidemiological study of randomised trials.

The objective of this study was to empirically assess the clinical effects of physiotherapy on pain in adults. Using meta-epidemiology, the authors report on the effects of a ‘physiotherapy’ intervention on self-reported pain in adults. For each trial, the group difference in the outcome ‘pain intensity’ was assessed as standardised mean differences (SMD) with 95% CIs. Stratified analyses were conducted according to patient population (International Classification of Diseases-10 classes), type of physiotherapy intervention, their interaction, as well as type of comparator group and risks of bias. The quality of the body of evidence was assessed based on GRADE methodology. An overall moderate effect of physiotherapy on pain corresponding to 0.65 SD-units (95% CI 0.57 to 0.73) was found based on a moderate inconsistency (I(2)=51%). Stratified exploration showed that therapeutic exercise for musculoskeletal diseases tended to be more beneficial than multimodal interventions (difference 0.30 95% CI 0.03 to 0.57; p=0.03). Trials with a ‘no intervention’ comparator tended to have a higher overall effect size than trials with a sham comparator (difference 0.25; 95% CI 0.09 to 0.41; p=0.004). In general, the confidence in the estimates was low, mainly due to high risk of performance biases and between-study heterogeneity.

Physiotherapy reduces pain in adults, but standardisation of interventions and focus on trial research with low risks of bias and reproducible treatment modalities are needed.

Neck Pain

Out of all 291 conditions studied in the Global Burden of Disease 2010 Study, neck pain ranked 4th highest in terms of disability and 21st in terms of overall burden.

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