Please assess the completion status of the following clinical trial:

Trial Title: Cohort Study of Efficacy and Safety of Interferon Intermittent Treatment of Chronic Hepatitis B

Study Design Characteristics:
- Allocation: None
- Intervention Model: None
- Observational Model: CASE_CONTROL
- Primary Purpose: None
- Time Perspective: RETROSPECTIVE
- Masking: None
- Phase: None
- Number of Arms: None

Eligibility Criteria:
Inclusion Criteria:~* All patients with chronic hepatitis B meet the diagnostic criteria of China Guidelines for the Prevention and Treatment of Chronic Hepatitis B (2015)~Exclusion Criteria:~* coinfection with other viruses including HCV, HDV, and HIV;~* syphilis antibody positive;~* co-exist other liver diseases including alcoholic liver disease, metabolic liver disease, fatty liver, drug induce liver injury, and autoimmune liver disease;~* complication of cirrhosis or liver cancer.

- Gender: ALL
- Minimum Age: 18 Years
- Maximum Age: 75 Years
- Healthy Volunteers: f

Study Arms:
- Continuous interferon treatment group (Type: None): Patients with chronic hepatitis B treated with continuous interferon for 48 weeks
- Intermittent interferon treatment group (Type: None): patients with chronic hepatitis B treated with intermittent interferon for 48 weeks, in which interferon therapy was intermittent for 3 months

Based on this trial design, predict the completion outcome and termination type (if applicable).