The design of the MOST Study is described in this publication:

Study Design (The Multicenter Osteoarthritis Study: Opportunities for Rehabilitation Research,  PM&R, Segal 2013)

The following are searches on for publications associated with the MOST grant numbers:

U01 AG18820 (David Felson, Boston University) 
U01 AG18947 (Cora E. Lewis, University of Alabama at Birmingham)
U01 AG18832 (James Torner, University of Iowa)
U01 AG19069 (Michael Nevitt, University of California, San Francisco)