Please assess the completion status of the following clinical trial:

Trial Title: A Comparative Effectiveness Study Evaluating OROS Methylphenidate HCl, Ritalin (Methylphenidate HCl), and Placebo for the Treatment of Attention Deficit Hyperactivity Disorder in Children

Study Design Characteristics:
- Allocation: RANDOMIZED
- Intervention Model: CROSSOVER
- Observational Model: None
- Primary Purpose: TREATMENT
- Time Perspective: None
- Masking: DOUBLE
- Phase: PHASE3
- Number of Arms: 3.0

Eligibility Criteria:
Inclusion Criteria:~* Patients with a diagnosis of one of the three subtypes of Attention Deficit Hyperactivity Disorder (ADHD) verified by both a parent/child interview and a teacher assessment using SNAP-IV questionnaires~* taking 5 - 20 mg of immediate-release methylphenidate (Ritalin®) at least twice a day, 20 - 60 mg of sustained-release methylphenidate (Ritalin-SR®) per day, or a combination of immediate-release and sustained-release methylphenidate up to a daily dose not exceeding 60 mg~* having used methylphenidate for at least 3 months at some time in the past and have been on the same dose for the previous 4-week period without any significant adverse experiences, considered to be positive responders to methylphenidate therapy, and agreeing to take only the supplied study drug as treatment for ADHD during the three-week treatment phase of the study~* able to comply with the study visit schedule and whose parent(s) and teacher are willing and able to complete the protocol-specified assessments, including behavior modification procedures~* agreeing not to ingest any caffeine containing beverages (e.g., coffee or soda) or foods (e.g., chocolate) on days 7, 14, and 21 of the study~Exclusion Criteria:~* Patients having clinically significant gastrointestinal problems, including narrowing of the gastrointestinal tract~* considered markedly anxious, tense, agitated, or depressed, having psychotic disorders, a history of seizures, or having a diagnosis of Tourette's syndrome~* whose primary treatment focus is oppositional-defiant disorder, conduct disorder, or tics, or whose primary treatment focus is other psychiatric conditions such as depressive disorders, bipolar disorders, or other mood disorders~* having a mean of two blood pressure measurements (systolic or diastolic) equal to or greater than the 95th percentile for age, sex, and height~* if female, have begun menstruation

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

Study Arms:
- 001 (Type: EXPERIMENTAL): OROS Methylphenidate HCl
- 002 (Type: ACTIVE_COMPARATOR): Ritalin
- 003 (Type: PLACEBO_COMPARATOR): Placebo

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