Observational studyBMC musculoskeletal disorders2026
Surgical versus non-surgical treatment of intra-articular comminuted distal radius fractures (AO 23-C2/C3) is associated with better patient-reported outcomes: an instrumental variable analysis using a national Swedish cohort.
Observational study in BMC musculoskeletal disorders, 2026. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Not yet cited in PubMed.
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Abstract
backgroundThe surgical rate for distal radius fractures is steadily rising despite limited evidence of its benefits over non-surgical treatment. Using a natural experimental approach, we aimed to compare patient-reported outcomes following surgical versus non-surgical treatment of distal radius fractures.
methodsRegistered in the Swedish Fracture Register by 36 Swedish hospitals from 2013 to 2018, we included a cohort of 13,356 fractures on 13,031 patients aged 18 years or older with distal radius fractures Arbeitsgemeinschaft fur Osteosynthesefragen (AO) 23-A2.1-2, A3, and C1-C3. The observational study utilized differences in the frequency of surgical treatment across hospitals as a source of random treatment assignment and a natural experiment. We assumed that all hospitals encountered a similar range of fractures each year. Therefore, the annual frequency of surgery per hospital was used as a proxy for randomization between surgical and nonsurgical treatment, regardless of each patient's actual treatment. The outcome was the individual Patient Reported Outcome Measures (PROM) at 1 year, with the Arm and Hand Function Index from the Short Musculoskeletal Function Assessment (SMFA) as the primary measure.
resultsThe surgical rate per hospital year ranged from 7 to 66%. Surgical treatment was associated with lower Arm and Hand Function Index scores in comminuted intraarticular fractures of type C2 (11.9 units, p = 0.004) and type C3 (19.4 units, p = 0.029). There was a tendency for a positive association with surgical treatment in dorsally angulated extraarticular fractures (23A2.2), but the difference of 5.1 units (p = 0.079) was below the Minimal Clinically Important Difference (MCID). In other extra-articular fractures (23-A2.1 and 23-A3) and simple intra-articular fractures (23-C1), the benefits of surgical treatment were small and also not statistically significant. Several sensitivity analyses were conducted to test the study design, and all supported the primary results.
conclusionsIn this comparison of surgical and non-surgical treatment for distal radius fractures across hospitals with varying surgical rates, comminuted intra-articular distal radius fractures (AO 23-C2/C3) treated surgically were associated with better one-year patient-reported outcomes than those treated non-surgically.
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