Related Variables
| ahi_a0h4 | AHI 4% -- all apneas and hypopneas with >=4% oxygen desaturation | Measurements/Polysomnography/Respiratory Events/Indexes | |
| ahi_c0h4 | Central AHI 4% -- central apneas and hypopneas with >=4% oxygen desaturation | Measurements/Polysomnography/Respiratory Events/Indexes | |
| oahi | Obstructive Apnea Hypopnea Index (OAHI) at 4% oxygen desaturation | Measurements/Polysomnography/Respiratory Events/Indexes | |
| rdi4p |
Overall RDI at 4% oxygen desaturation
Ratio of the count of all apneas (central and obstructive) and hypopneas associated with at least a 4% oxygen desaturation to the total sleep time expressed in hours |
Measurements/Polysomnography/Respiratory Events/Indexes | |
| rdi4ps | Overall RDI (Supine) at 4% oxygen desaturation | Measurements/Polysomnography/Respiratory Events/Indexes | |
| rdinr4p | Overall RDI (NREM) at 4% oxygen desaturation | Measurements/Polysomnography/Respiratory Events/Indexes |