There are many tests applied for any sleep disorder in sleep clinics in order to help determining levels of daytime sleepiness.
Subjective tests are prepared by each clinic taking into consideration their patient population. These tests intend to standardize sleepiness levels reported by patients. These tests sometimes may be varied measuring patient’s daytime performance using computer other than sleeplines
The only onjective standard test used to measure daytime sleepliness which is standardized all over the world is the multiple daytime sleepiness test. (Multiple sleep latency test, (MSLT) The details of this test will be discussed in the other sections. However, it can be briefly stated that, this test is implemented to patient 5 times a day with 2 hour intervals. After patients are laid down, they are instructed to remain their eyes closed and not to resist against sleep. Patients’ sleep latency is measured under these conditions and daytime sleepiness levels are measured from the averages with standard measures. The experiment subject persons who do not complain about their sleep were examined as control group; and it was seen that their average of falling asleep time was 10 minutes.
After a bad passed night, if bad quality sleep causes daytime sleepiness; the patients are expected to fall asleep in a shorter time than normal controls. Because, during the test it is determined that; the patients who do not complain about their sleep; and their waking reactions at nights as a result of frequent respiratory arrest condition have been diagnosed; sleep in less than 10 minutes.
Increased sleepiness levels not detectable in patients with complaints of insomnia. In these tests, night sleep time was shortened and the falling asleep times were extended; the patients who frequently wake at nights were able to resist against sleep for longer periods compared to normal controls.
The patients who expressed in subjective assessments that; they were tired and feeling themselves so faint that they could not move; said that they could not sleep despite all this fatigue. Indeed, the objective tests affirm that; inability to sleep at night and daytime show that; the patients who suffer from insomnia have high threshold of falling asleep.
As a result, the patient suffering from insomnia can not sleet at daytime either. But this wakefulness does not mean that the patients may perform their activities normally. Patients can not sleep at daytime; therefore they continue their lifes as being tired and inefficient.