Table 1 Detailed inclusion and exclusion criteria

1. Age above 80 years.

2. Acute (<36 h) displaced femoral neck fracture (Garden ≥3).

3. Independent walking ability with or without walking aids.

4. Pfeiffer test 8–10 points.

Exclusion criteria

1. Osteoarthritis or rheumatoid arthritis in the fractured hip

2. Pathologic fractures

3. Non-walkers

4. Cognitive impairment (Pfeiffer Test 0–7)

5. Contraindications for surgery by other reasons (ulcers, severe somatic illness, severe bleeding disorder).

6. Unsuitable to participate in the trial for any other reason.