Total scores for SPCM-A and
SPCM-F are derived by simple addition. The score for
the LSS is derived from an 8-point ordinal scale
ranging from1 (being unable to attain a sitting position
with the assistance of one person for 30 s), to 8 (being
able to sit independently for at least 30 s and to move
in and out of the base of support from a forward, side
or backward direction). Specific measurable criteria
are provided for each level