Please assess the completion status of the following clinical trial:

Trial Title: The Effects of Noninvasive Brain Stimulation on Physical and Mental Functioning in Older Adults

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

Eligibility Criteria:
Inclusion Criteria:~* Slow gait, defined by an over-ground preferred walking speed of less than or equal to 1.0 m/s.~* Executive dysfunction, defined by a Trail Making Test B z-score of greater than one standard deviation below age- and gender-based norms.~Exclusion Criteria:~* Non-ambulatory~* Clinical history or brain imaging evidence of a previous stroke~* Parkinson's Disease~* Normal pressure hydrocephalus~* Other neurodegenerative condition~* Severe depression~* Lower-extremity arthritis or pain causing slow gait~* Inability or unwillingness to understand or participate in the study protocol~* Contraindications to MRI or tDCS, including (but not limited to) personal or family history of epilepsy, use of neuro-active drugs, claustrophobia or risk of metal objects in the body.

- Gender: ALL
- Minimum Age: 65 Years
- Maximum Age: None
- Healthy Volunteers: f

Study Arms:
- Real tDCS (Type: EXPERIMENTAL): The real tDCS intervention will consist of 10 daily 20-minute sessions of transcranial direct current stimulation (tDCS) targeting left prefrontal cortex at a target current intensity of 1.5 mA.
- Sham tDCS (Type: SHAM_COMPARATOR): The sham tDCS intervention will consist of 10 daily 20-minute sessions of transcranial direct current stimulation with same montage as the real tDCS, except current will only be applied for the first 60 seconds of each session.

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