4.1 Assessment of floor and ceiling scores of scales
Lower percentages of floor and ceiling scores and high reliability
criteria indicate that the measurement was performed
well28,29. A percentage greater than 20% indicates a
significant floor / ceiling effect22,30. Considering
the effects of floor and ceiling scores of both scales, SSQOL ceiling
score percentages were higher in our study, but floor score rates were
higher in three subdimensions of SF-36 other than PF / PA. These
findings may be due to the fact that though similar, these subdimensions
do not evaluate the same structure, and that SF-36 evaluates both the
positive and negative aspects of health. However, SSQOL assesses these
post-stroke functions in more detail12. In the Turkish
version of SSQOL, the PA subdimension assesses upper extremity
functions, work / productivity, mobility, and physical status during
self-care27. SF-36, on the other hand, evaluates the
constraints in severe physical activities due to health problems in the
PF subdimension. However, the fact that there were significant positive
relationships in the four dimensions of the two scales and that their
internal consistencies were close to each other, showed that both scales
generally evaluated a similar structural characteristics.