an increasing trendP = 0.045
There were 15 (5.0%) proximal humerus fractures located in the meta-diaphyseal transitional zone. The rate of operative treatment There was an increasing trend of operative treatment, while the rate changed from 0 to 16% during the study time (Diff. 16, 95% CI 0.3 to 34.9%, P = 0.045) (Fig. 2 ).