The Steinbrocker
functional classification was used by the physician or the
research nurse, who were trained in physical function assessment, to
rate the extent of physical disability on a four-level scale, ranging
from Class I, "complete functional capacity to carry out all usual
duties without handicaps", to Class IV, "largely or wholly
incapacitated with (the person) bedridden or confined to wheelchair.
Structure / Content
I - Complete ability to carry out all the usual duties without handicaps
II - Adequate for normal activities despite handicap of discomfort or
limited motion of one of the joints
III - Limited to little or none of the duties of usual occupation or
self-care
IV - Incapacitated, largely or wholly bed-ridden or confined to a
wheelchair with little or no self-care