Please assess the completion status of the following clinical trial:

Trial Title: Investigating the Effects of a Spinal Mobilisation Intervention in People With Lower Back Pain

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

Eligibility Criteria:
Inclusion Criteria:~* Suffering from lower back pain (region between 12th rib and gluteal folds), acute or chronic.~Exclusion Criteria:~Respond positively to any absolute contraindications for spinal therapy, including:~* segment instability~* infectious disease~* osteomyelitis~* bone tumours~* neurological deficit~* upper motor neuron lesion~* spinal cord damage~* cervical arterial dysfunction~Respond positively to relative contra-indications, excluded based on severity, including:~* osteoporosis~* spinal instability~* rheumatoid arthritis~* inflammatory disease~* active history of cancer~* hypermobile syndrome~* segment hypermobility~* cardiovascular disease~* cervical anomalies~* nerve root disorder~* spinal surgery~* respiratory problems~* thrombosis~* open wounds~* local infection~* fractures or dislocations

- Gender: ALL
- Minimum Age: 16 Years
- Maximum Age: 80 Years
- Healthy Volunteers: t

Study Arms:
- A - Intervention then control (Type: EXPERIMENTAL): Intervention (30 minutes spinal mobilisations) received in first session, then control (30 minutes lying still) received in second session.
- B - Control then intervention (Type: EXPERIMENTAL): Control (30 minutes lying still) received in first session, then intervention (30 minutes spinal mobilisations) received in second session.

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