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. Author manuscript; available in PMC: 2014 Sep 1.
Published in final edited form as: Osteoarthritis Cartilage. 2013 Sep;21(9):10.1016/j.joca.2013.04.013. doi: 10.1016/j.joca.2013.04.013

Figure 2. Average Study Duration by Type of Intervention Investigated.

Figure 2

This figure shows average clinical trial study duration, stratified by intervention type (behavioral, pharmacologic, surgical procedures and devices, or other). Average duration is reported in months. The 95% confidence intervals are indicated in the graph.