Please assess the completion status of the following clinical trial:

Trial Title: Prophylatic Effect Preoperative Antibiotics With Mechanical Bowel Preparation in SSIs: A Propensity Analysis

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

Eligibility Criteria:
Inclusion Criteria:~1. Patient underwent elective colorectal resection to treat a malignancy;~2. Patient baseline characteristics and operative information were available;~3. MBP (mechanical bowel preparation) was performed before surgery, with or without OA (oral antibiotics).~Exclusion Criteria:~1. Emergency surgery;~2. MBP was not conducted due to ileus or patient refusal;~3. Enough data was not available;~4. Colorectal resection was performed due to benign disease;~5. The procedure was accompanied by other procedures that had the potential to contaminate the incision, such as cholecystectomy or appendectomy;~6. Patients underwent neoadjuvant radiotherapy before surgery.

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

Study Arms:
- OA+MBP group (Type: None): Either polyethylene glycol or magnesium sulphate was adopted as laxative one day before surgery. Clyster was conducted on surgery morning. Streptomycin 1g plus metronidazole 0.2g was prescribed 3 times a day for 3 days before surgery in the OA+MBP group patients.
- MBP group (Type: None): Either polyethylene glycol or magnesium sulphate was adopted as laxative one day before surgery. Clyster was conducted on surgery morning. No oral antibiotics was administered to the patients.

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