3) Bellamy N, Buchanan WW, Goldsmith CH, Campbell J, Stitt LW : Validation study of WOMAC : a health status instrument for measuring clinically important patient relevant outcomes to antirheumatic drug therapy in patients with osteoarthritis of the hip or knee. J Rheumatol 1988 ; 15 : 1833-1840
4) Cunningham DA, Rechnitzer PA, Pearce ME, Donner AP : Determination of self-selected walking pace across ages 19-66. J Gerontol 1982 ; 37 : 560-564
5) Podsiadlo D, Richardson S : The timed “Up & Go” : a test of basic functional mobility for frail elderly persons. J Am Geriatr Soc 1991 ; 39 : 142-148