Please assess the completion status of the following clinical trial:

Trial Title: Treatment of Pelvic Ring Fractures in the Elderly

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

Eligibility Criteria:
Inclusion Criteria:~* CTI/MRI verified fracture of the sacrum affecting the posterior ring or both posterior and anterior ring~* age\>65 years, ambulatory with/without walking aids before Trauma~* ambulatory with/without walking aids before trauma~* postmenopausal status in women~* informed consent for study participation and surgery~Exclusion Criteria:~* Refusal of consent by the patient or legal representatives to participate in the study~* Other fractures or~* Unstable pelvic fracture (type B or C according to classification of 'Arbeitsgemeinschaft für Osteosynthesefragen' (AO)/OTA) requiring surgical stabilisation after high- or low-energy trauma~* Suspicion of a pathological fracture in the context of known or unknown malignancy~* Previous surgery of the pelvis with metal obstructing the planned paths of the ilio-sacral screws~* Symptomatic low back pain with morphological changes, i.e. intervertebral disc displacement, neoplasm metastasis in the axial skeleton, spinal stenosis, vertebral fracture, spondylarthropathy etc.~* Comorbidity that precludes undergoing general or spinal anaesthesia~* Pre-trauma mobility status that precludes achieving a post-trauma mobility status enabling the patient to perform the timed up and go test (e.g. patient being in a wheel chair)

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

Study Arms:
- experimental intervention surgery (Type: EXPERIMENTAL): screw osteosynthesis of the sacrum and in certain cases additional plate osteosynthesis of dislocated pubic rami fractures, postoperative analgesia, physiotherapy, work-up for osteoporosis, geriatric rehabilitation if necessary
- control intervention conservative (Type: ACTIVE_COMPARATOR): analgesia, physiotherapy, work-up for osteoporosis, geriatric rehabilitation if necessary

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