Early versus delayed mobilisation for non-surgically treated proximal humerus fractures: a systematic review and meta-analysis of randomised trials

Background Proximal humerus fractures (PHFs) are among the commonest bony injuries and the majority of them can be managed non-surgically. The aim of our systematic review and meta-analysis was to compare the effectiveness and safety of early versus delayed mobilisation in conservatively treated PHFs. Methods A literature search was performed in Medline, EMBASE and clinicaltrials.gov in Januray 2025 aiming to identify all randomised controlled trials (RCTs) comparing early versus delayed (conventional) mobilisation as part of the non-surgical management of PHFs. Primary outcomes were patient-reported function and pain at short-term (3 months), mid-term (6 months) and long-term (12 months) follow-up, and secondary outcomes included secondary fracture displacement and total complications. Meta-analyses produced mean differences (MDs) or standardised MDs (SMDs) for continuous outcomes and odds ratios (ORs) for binary outcomes, with 95% confidence intervals (CI). Certainty of evidence was assessed using the GRADE tool. Recommendations for clinical practice were given only based on results of high or moderate certainty of evidence. Results Six (6) RCTs were included that compared early mobilisation (EM; within one week from injury) to delayed mobilisation (DM; after 3 or 4 weeks of immobilisation) with a total of 470 patients with PHFs. There were no differences in patient-reported function (combined or Constant score) or pain between the EM and DM groups at any follow-up time points except for a significant difference in combined function scores favouring EM [SMD 0.4 CI (0.1,0.7), P = 0.006] at 3 months follow-up. There were no significant differences in the incidence of secondary fracture displacement and total complications in the two groups [OR 3.5 CI (0.7,18.2), P > 0.05, and OR 1.2 CI (0.5,2.9), P > 0.05, respectively]. All results were based on moderate or high strength of evidence. The most significant limitations of our study were the small number of pooled studies and inability to perform subgroup analyses for specific fracture types. Conclusions Our meta-analysis of RCTs showed that commencement of mobilisation within one week from injury for non-surgically managed PHFs is safe and may confer short-term functional benefits compared to delayed mobilisation.