Further to policy 4.3.2, the expense authority may receive assistance from staff to fulfill his/her responsibilities. However, the expense authority is accountable for expenditure approval, and approval of payment requisitions for direct invoices (i.e., vendor invoices or items not matched to a purchase order or contract using iProcurement).
Comorbidity: Addiction and Other Mental Illnesses. When two disorders or illnesses occur in the same person, simultaneously or sequentially, they are described as comorbid. Comorbidity also implies interactions between the illnesses that affect the course and prognosis of both.
Epidemiology of comorbidity. Comorbidity is a serious treatment issue for AOD clinicians. Up to one-third of clients with mental health conditions have an alcohol or other drug use problem (Regier et al., 1998; Teesson et al., 2001) and may be referred to AOD services.ackground. Concurrent mental health and alcohol and other drug (AOD) problems continue to pose a complex clinical and management issue for treatment services, despite increasing recognition of the high rates of these co-occurring or âcomorbidâ conditions.