The OPRO-M™ 12-item short form is recommended in most situations, including where mobility is a primary outcome (e.g., comparative effectiveness studies) or when important treatment decisions are to be made (e.g., selecting an orthosis for a patient). However, the OPRO-M™ 12-item short form measures with less precision at the extreme ends of the mobility continuum.
The OPRO-M™ 20-item short form is more suitable when measuring individuals with very low or very high mobility. The 20-item short form may also be more appropriate for research when comparing minor changes in mobility.
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