Please assess the completion status of the following clinical trial:

Trial Title: Treatment of Subclinical Hyperthyroidism

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

Eligibility Criteria:
Inclusion Criteria:~* Men and women aged 50 and greater~* Isolated decreased thyroid-stimulating hormone (TSH) with normal FT4 and FT3 levels~Exclusion Criteria:~* Iodide overload~* Non sinusal heart rhythm~* Severe heart disease

- Gender: ALL
- Minimum Age: 50 Years
- Maximum Age: None
- Healthy Volunteers: f

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