Fig. 1.

Search algorithm used to select articles for analysis. Search terms initially yielded 1870 articles, 68 of which were selected for analysis of abstract based on inclusion and exclusion criteria. Another 42 articles were removed because they were too specific in their focus or lacked relevant data. This yielded 26 articles for full text analysis. Another 7 articles were included from manual cross-referencing. From these, 12 articles lacked relevant epidemiological data and were excluded to leave 21 relevant articles that were eventually selected for analysis of the full text. Some articles were utilized twice for different analyses. Abbreviations: Fx: fracture, SCI: spinal cord injury.