... difficulty they experience performing eight activ-ities (dressing, getting out of bed, lifting a cup, walking,bathing, bending, turning faucets, and getting in and out of a car), on a scale ranging from ... walking velocity, and shirt button speed in consecutive RA patients attending scheduled appointmentsat six rheumatology clinics, repeating these measurements aftera median interval of 1 year. ... likely due toimproved capture of an underlying construct when multiplescales are used, in contrast with a single instrument. Thereare precedents in rheumatology for developing pooledindices,...