Identify the study design used in the following research project:
Twenty patients, all of whom have bipolar mania, have been placed on lithium and also begun on a medication believed to prevent rapid cycling. The patients are followed for 12 months, at which time they are seen by a psychiatrist monthly, to adjust their dosages. Medication compliance, emergency department visits, and mental health hospitalizations are measured. These are compared with another group of patients with the same mental illness, being treated on lithium alone. What is this design?

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The Answer of Identify the study design used in the following research project:
Twenty patients, all of whom have bipolar mania, have been placed on lithium and also begun on a medication believed to prevent rapid cycling. The patients are followed for 12 months, at which time they are seen by a psychiatrist monthly, to adjust their dosages. Medication compliance, emergency department visits, and mental health hospitalizations are measured. These are compared with another group of patients with the same mental illness, being treated on lithium alone. What is this design?

Identify the Study Design Used in the Following Research Project