American Psychiatric Nurses Association Position: Staffing Inpatient Psychiatric Units.

Consistent with current evidence, the universal use of a single method or model of determining staffing needs (e.g., nursing hours per, case mix index, or mandatory ratios) is not recommended. PMH nurses should champion systematic evaluation of staffing on their inpatient units against select patient, nurse, and system outcomes. A data repository of PMH nurse-sensitive outcomes is necessary to benchmark unit performance and staffing.