Table 4 Logistic regression analysis of the use of intramedullary nail (IMN) versus sliding hip screw (SHS) with or without trochanteric support plate (TSP) on patient characteristics, fracture classification, and hospital characteristics. The analysis was performed on 15,655 (10,600 SHS and 5055 IMN) cases with complete data

 Higher age (years)

1.0

0.99–1.0

0.3

 Female sex

1.0

0.89–1.1

0.6

 ASA > 2

1.0

0.96–1.1

0.3

 Cognitive impairment (yes)

1.1

0.98–1.2

0.1

 AO/OTA 31A1

1

 AO/OTA 31A2

1.8

1.6–1.9

< 0.001

 AO/OTA 31A3 and subtrochanteric

5.3

4.5–6.2

< 0.001

Surgeon experience > 3 years

2.0

1.8–2.2

< 0.001

 Academic hospital

0.1

0.08–0.11

< 0.001

 High-volume hospital (> 100 cases/year)

0.4

0.35–0.44

< 0.001

 Urban hospital

0.2

0.16–0.20

< 0.001

 Health region South-Eastern Norway

1

 Health region Western Norway

2.6

2.3–3.0

< 0.001

 Health region Central Norway

1.6

1.4–1.9

< 0.001

 Health region Northern Norway

1.5

1.25–1.71

< 0.001