ObjectiveTo systematically review the effects of associated ulnar styloid fracture on the prognosis of distal radius fracture. MethodsDatabases including PubMed, EMbase, The Cochrane Library (Issue 5 2013), CNKI, CBM and WanFang Data were searched up to May 2013 for collecting cohort studies about the effects of associated ulnar styloid fracture on the prognosis of distal radius fracture. According to the inclusion and exclusion criteria, related cohort studies were screened, data were extracted and cross-checked, and quality of included studies was independently evaluated by two reviewers. Meta-analysis was then conducted using RevMan 5.2 software. ResultsA total of 9 studies involving 1 020 patients were included. The results of meta-analysis showed that there was no significant difference in GartlandWerley score between patients with ulnar styloid fracture or not. Statistical significant difference was found in DASH score between the two groups (MD=2.71, 95% CI 0.26 to 5.16, P=0.03), which indicated that patients with ulnar styloid fracture got higher score in DASH score. ConclusionCurrent evidence shows that ulnar styloid fracture may affect the prognosis of patients with distal radius fracture. Due to the quality and quantity limitation of the included studies, the above conclusion needs to be further verified by more high quality studies in future.