Status: current, Not sufficiently defined by necessary conditions definition status. Date: 31-Jan 2002. Module: SNOMED CT core module
Descriptions:
| Id | Description | Lang | Type | Status | Case? | Module | 
| 370622016 | Duration of sleep | en | Synonym | Active | Entire term case insensitive | SNOMED CT core module | 
| 638542018 | Duration of sleep (observable entity) | en | Fully specified name | Active | Entire term case insensitive | SNOMED CT core module | 
| Outbound Relationships | Type | Target | Active | Characteristic | Refinability | Group | Values | 
| Duration of sleep | Is a | Sleep related observable | true | Inferred relationship | Existential restriction modifier | 
| Inbound Relationships | Type | Active | Source | Characteristic | Refinability | Group | 
| Sleep pattern disturbance | Interprets | False | Duration of sleep | Inferred relationship | Existential restriction modifier | |
| Sleep deprivation | Interprets | True | Duration of sleep | Inferred relationship | Existential restriction modifier | 1 | 
| Insufficient rest/sleep for age | Interprets | True | Duration of sleep | Inferred relationship | Existential restriction modifier | 1 | 
| Insufficient rest/sleep for physical condition | Interprets | False | Duration of sleep | Inferred relationship | Existential restriction modifier | 
This concept is not in any reference sets