Of note, these trials enrolled highly selected samples.
Patients had to have the desire and confidence, as well as
the manual dexterity, visual acuity, and mental faculties, to
use the testing device and either relay those values to their
clinic (PST) or adjust doses on their own (PSM). In most
of the trials, 50% of patients or fewer met preliminaryeligibility criteria, successfully completed the training, and
agreed to be randomly assigned. Some of the reasons cited
for patient unwillingness to participate or continue with
PST or PSM included patient-perceived physical limitations,
lack of confidence in their ability to follow the protocol,
difficulty with performing measurements, and preference
for an alternative method (41, 43). However,
among the randomly assigned patients, the percentage who
continued with the intervention throughout the study was
relatively high (64% to 98%), and patients in the PST or
PSM group generally reported higher satisfaction and quality
of life than those in the usual care group.