Sleep Disordered Breathing

Inclusion Criteria

• •The investigators will consecutively enroll 500 persons with chronic SCI (NParaplegia =250, NTetraplegia =250) in a web-based survey.
• •Study participants will include males and females aged 18 years and older with SCI at the C5-L1 levels for more than 1 year.
• •The investigators will consecutively enroll 75 persons with chronic tetraplegia aged 18 years and older with SCI at the C5-C8 levels for more than one year.
• •The International Standards for Neurological Classification of SCI (ASIA/ISCoS)157 will serve as benchmarks for subject classification.
• •A rater experienced in these procedures will classify study subjects.
• •Persons from all ethnic and racial groups will be enrolled.
• •The investigators will seek a gender distribution in proportion to population representation of persons with SCI (\~80% male,
• •\~20% female).
• •After being provided with the study privacy practices, and HIPAA certification indicating available protections, participant candidates will undergo informed consent procedures approved by the Human Subjects Committee (IRB) at the University of Miami Miller School of Medicine (UM-MSOM).
• •The investigators will consecutively enroll the first 25 persons from testing under Specific Aim 2 who satisfy criteria for diagnosis of SDB and consent to undergo additional study.