Please assess the completion status of the following clinical trial:

Trial Title: A Study for Patients With Erectile Dysfunction to Test Whether Tadalafil Taken Once a Day Can Better Improve Psychological Outcomes.

Study Design Characteristics:
- Allocation: RANDOMIZED
- Intervention Model: CROSSOVER
- Observational Model: None
- Primary Purpose: TREATMENT
- Time Perspective: None
- Masking: NONE
- Phase: PHASE3
- Number of Arms: 6.0

Eligibility Criteria:
Inclusion Criteria:~* History of erectile dysfunction (ED).~* Have had satisfactory response to tadalafil, sildenafil citrate, or vardenafil HCl for a period of at least 6 months and expect frequent use (at least one dose per week, on average) when administered as needed.~* Have never used tadalafil 5 mg or 2.5 mg once a day therapy.~* Anticipate having the same adult female sexual partner willing to participate during the study.~* Agree to make at least four sexual intercourse attempts during the first four weeks of the study.~* Agree not to use any other treatment for ED (even herbal treatments) during the study.~* Agree to follow the directions given by the study doctor and staff about using the study drug.~Exclusion Criteria:~* Have any other primary sexual disorders present or penile deformity.~* Have history of radical prostatectomy or penile implant.~* Have problems with your kidneys, liver, or nervous system.~* Have uncontrolled diabetes, as measured by a blood test for haemoglobin A1C greater than a value of 11%.~* Are being treated for heart disease with any drug that is called a nitrate (for example, nitroglycerin).~* Have chest pain (called unstable angina or angina) that requires treatment.~* Have heart disease that causes symptoms after you exert yourself.~* Have had any of the following in the past 90 days: Heart attack, also known as a myocardial infarction (MI); Heart bypass surgery (called coronary artery bypass graft surgery); Had a procedure to open up blood vessels in the heart known as angioplasty or stent placement (percutaneous coronary intervention).~* Have a history of loss of vision in one eye because of nonarteritic anterior ischemic optic neuropathy (NAION).~* Have retinitis pigmentosa.~* Have history of human immunodeficiency virus (HIV).~* Have very high or very low blood pressure (your study doctor will discuss the limits with you).~* Have had a stroke or a significant injury to your brain or spinal cord within the last 6 months.~* Have rare hereditary problems of galactose intolerance, the Lapp lactase deficiency or glucose-galactose malabsorption Lactose intolerance.~* Have a scheduled or planned surgery requiring anaesthesia during the course of the study.~* Have a scheduled cataract surgery during the curse of the study.

- Gender: MALE
- Minimum Age: 18 Years
- Maximum Age: None
- Healthy Volunteers: f

Study Arms:
- T(OaD)/S(PRN)/T(PRN) (Type: EXPERIMENTAL): Tadalafil 5 mg once a day \[T(OaD)\] for 8 weeks, 1 week washout, sildenafil citrate 100 mg as needed \[S(PRN)\] for 8 weeks, 1 week washout, tadalafil 20 mg as needed \[T(PRN)\] for 8 weeks
- T(OaD)/T(PRN)/S(PRN) (Type: EXPERIMENTAL): Tadalafil 5 mg once a day \[T(OaD)\] for 8 weeks, 1 week washout, tadalafil 20 mg as needed \[T(PRN)\] for 8 weeks, 1 week washout, sildenafil citrate 100 mg as needed \[S(PRN)\] for 8 weeks
- S(PRN)/T(OaD)/T(PRN) (Type: EXPERIMENTAL): Sildenafil citrate 100 mg as needed \[S(PRN)\] for 8 weeks, 1 week washout, tadalafil 5 mg once a day \[T(OaD)\] for 8 weeks, 1 week washout, tadalafil 20 mg as needed \[T(PRN)\] for 8 weeks
- S(PRN)/T(PRN)/T(OaD) (Type: EXPERIMENTAL): Sildenafil citrate 100 mg as needed \[S(PRN)\] for 8 weeks, 1 week washout, tadalafil 20 mg as needed \[T(PRN)\] for 8 weeks, 1 week washout, tadalafil 5 mg once a day \[T(OaD)\] for 8 weeks
- T(PRN)/T(OaD)/S(PRN) (Type: EXPERIMENTAL): Tadalafil 20 mg as needed \[T(PRN)\] for 8 weeks, 1 week washout, tadalafil 5 mg once a day \[T(OaD)\] for 8 weeks, 1 week washout, sildenafil citrate 100 mg as needed \[S(PRN)\] for 8 weeks
- T(PRN)/S(PRN)/T(OaD) (Type: EXPERIMENTAL): Tadalafil 20 mg as needed \[T(PRN)\] for 8 weeks, 1 week washout, sildenafil citrate 100 mg as needed \[S(PRN)\] for 8 weeks, 1 week washout, tadalafil 5 mg once a day \[T(OaD)\] for 8 weeks

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

Answer: outcome: complete