The Effect of CPAP Treatment on Cognitive Functions, Anxiety, and Affective Symptoms
The Effect of CPAP Treatment on Cognitive Functions, Anxiety, and Affective Symptoms
Long term, prospective study of continuous positive airway pressure treatment influence on
 cognitive functions in patients with obstructive sleep apnea syndrome.
Brief summary:

 The aim of work is to assess the extent of anxiety and affective disorders symptoms and
 cognitive performance in newly diagnosed patients with obstructive sleep apnea. In the second
 phase, follow the changes in these areas after 2 months and after 1 year of continuous
 treatment. The investigators can then compare the change of symptoms and cognitive
 performance in terms of compliance with treatment.

 Course:

 Recent papers discus the interconnection of anxiety and affective disorders and the
 deterioration of cognitive functions in patients with untreated obstructive sleep apnea.
 Contemporary literature also describes the effect of PAP on affective and anxiety disorders,
 but the results of published works are controversial and often contradictory. The effect of
 OSA treatment on cognitive function is explored more and studies show improvement of
 cognitive function while adhering to regular overpressure breathing at night. In this study
 patients diagnosed with OSA (Porti 7- F + G, Germany or Alice 5- Respironics, USA) indicated
 for PAP (AHI> 15) therapy admitted for PAP pressure adjustment will be given by investigator
 The Epworth Sleepiness Scale, Beck's anxiety inventory and Beck's depression inventory. Then
 each participant will undergo clinical examination by the investigator using
 Mini-International Neuropsychiatric Interview to assess whether the participant meets the
 ICD-10 criteria for major depressive disorder. In the next step each participant will
 complete three given cognitive tests (Trail making test, D2 test, Controlled Oral Word
 Association Test). Results of the cognitive test will be adjusted for age and compared with
 the population norms for each test to assess the presence of cognitive impairment at the
 beginning of treatment. In the next phase participants will use PAP device in the home
 environment for two months. At outpatient control after 2 months, participants will complete
 Beck's anxiety inventory and Beck's depression inventory and Epworth sleepiness scale. In the
 last phase participants will use PAP device for another 10 months in the home environment so
 the total period of treatment will be 1 year. At the outpatient control after 1 year of
 treatment participants will complete Beck's anxiety inventory and Beck's depression inventory
 and Epworth sleepiness scale, each participant will then again complete three given cognitive
 tests (Trail making test, D2 test, Controlled Oral Word Association Test). Information on
 average use over a 1-year period and compliance with treatment will be provided from the PAP
 device. Participants will be then divided into two groups, compliant (over 4 hours of PAP
 treatment per night on average) and non-compliant (less then 4 hours of PAP treatment per
 night on average) and the data from the questionnaires and cognitive tests will be compared.
Inclusion Criteria:

 -  Newly diagnosed obstructive sleep apnea indicated for positive airway pressure
 therapy, i.e. Apnea-Hypopnea index AHI> 15

 Exclusion Criteria:

 -  Psychiatric treatment

 -  Treatment with psychoactive drugs