Results
are reported for all 19 subjects.
Average
pain scores were calculated for the 95 subject days in each condition.
On
average, subjects reported 44% less pain during the week
in which they used the back support.
The 10 subjects who gained the greatest benefit averaged a reduction
of 82% in back pain, indicating that for many people correct
back support
gives a very substantial relief.
Four
subjects reported no benefit or increased pain. This is in line
with other research which suggests that either a single shape
and size of support cannot suit everyone, or that some back pain
is not linked to seated posture at all. However some comments
from these subjects suggested that they could have improved the
benefit, by closely following the instructions for use in relation
to height adjustment.
Pain
relief was greater after two days than at first, suggesting
that
the body's repair processes were being facilitated by the support.
A
statistical T-test and an Anova test were performed on the data
to determine the scientific reliability of the results. The test
results indicate very high reliability - if the trial were repeated,
the same result would be found more than 99.9% of the time.
These
findings indicate that there is a general benefit from correct
back support
while sitting, which lasts longer than individual sitting periods.
