Surgical Approach of Hemiarthroplasty After Femoral Neck Fracture: Posterolateral or Direct Lateral

The EQ-5D-5L descriptive system assesses health in five dimensions (MOBILITY, SELF-CARE, USUAL ACTIVITIES, PAIN / DISCOMFORT, ANXIETY / DEPRESSION), each of which has five levels of response (no problems, slight problems, moderate problems, severe problems, extreme problems/unable to). This part of the EQ-5D questionnaire provides a descriptive profile that can be used to generate a health state profile. Health state index scores generally range from less than 0 (where 0 is the value of a health state equivalent to dead; negative values representing values as worse than dead) to 1 (the value of full health), with higher scores indicating higher health utility. The second part of the questionnaire consists of a visual analogue scale (VAS) on which the patient rates his/her perceived health from 0 (the worst imaginable health) to 100 (the best imaginable health).

Number of patients which are undergoing a re-intervention in the first 6 months after surgery

Balance test (SPPB)

The Falls Efficacy Scale-International (FES-I) is a short, easy to administer tool that measures the level of concern about fallingduring 16 social and physical activities inside and outside the home whether or not the person actually does the activity. The minimum score is 16 (no concern about falling) to the maximum score of 64 (severe concern about falling).

Numeric Rating Scale (NRS) is a numeric scale to assess pain. The minimum score is 0 (no pain) and the maximum score is 10 (the worst imaginable pain)

Katz Index of Independence in Activities of Daily Living (ADL) is an instrument to assess functional status as a measurement of the client's ability to perform activities of daily living independently. The Index ranks adequacy of performance in the six functions of bathing, dressing, toileting, transferring, continence, and feeding. Clients are scored yes/no for independence in each of the six functions. A score of 6 indicates full function, 4 indicates moderate impairment, and 2 or less indicates severe functional impairment.

Mobility according to the mobility score. We'll assess the mobility according to the following options: no walking aids, 1 walking stick, walker or two crutches, in-house mobility but outside no mobility without aids, no functional mobility

The number of post-operative complications

Discharge destination: We'll ask where the patient is going to live after discharge, which we compare with the place where the patient was living before the trauma. The options are: independently at home, at home with care, nursing home, rehabilitation center.

An economic evaluation will be performed for physical functioning and Quality Adjusted Life Years (QALYs). For estimating QALYs, the patients' EQ-5D-5L health states will be converted into utility scores using the Dutch tariff. QALYs will subsequently be calculated using linear interpolation between measurement points.