Please assess the completion status of the following clinical trial:

Trial Title: Effect of Guanfacine Extended-Release on Attention Deficit Hyperactivity Disorder (ADHD)-Associated Insomnia

Study Design Characteristics:
- Allocation: RANDOMIZED
- Intervention Model: PARALLEL
- Observational Model: None
- Primary Purpose: TREATMENT
- Time Perspective: None
- Masking: QUADRUPLE
- Phase: PHASE4
- Number of Arms: 2.0

Eligibility Criteria:
Inclusion Criteria:~1. Subject must be male or female, aged 6 - 12 years with ADHD.~2. Subject must (a) be taking methylphenidate, amphetamine, or atomoxetine for treatment of ADHD with parent or subject concerns of inadequate efficacy or intolerable side effects, or (b) free of any other medication used to treat ADHD for at least 30 days at the time of the initial sleep study.~3. Subject must have repeated difficulty with sleep initiation or persistence despite attempts at adequate sleep hygiene.~4. Subject must be able to swallow tablets.~Exclusion Criteria:~1. Subject or parent/LAR is unable or unwilling to discontinue present medications used to treat ADHD.~2. Subject has a body mass index \< 5th percentile for age, using the Centers for Disease Control standards reported in 2000.~3. Subject has a body weight \> 176 pounds.~4. Subject has a diagnosis of Autism or Autism Spectrum Disorder.~5. Subject has other serious psychiatric diagnoses.~6. Subject has a medical condition that may require treatment with an unapproved medication, that may cause a safety concern, or that may confound outcome results~7. Subject has an excessive caffeine intake (greater than 2.5 mg/kg/d).~8. Subject has a prior problem with clonidine or guanfacine.

- Gender: ALL
- Minimum Age: 6 Years
- Maximum Age: 12 Years
- Healthy Volunteers: f

Study Arms:
- Guanfacine Extended-Release Tablets (Type: EXPERIMENTAL): Guanfacine Extended-Release Tablets 1mg, 2mg, 3mg, and 4mg
- Placebo comparator (Type: PLACEBO_COMPARATOR): Placebo control

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