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Journal of Orthopaedics and Traumatology

Official Journal of the Italian Society of Orthopaedics and Traumatology

Table 3 Incline parameters means with mean absolute symmetry indices (SI) in percent %

From: The loading patterns of a short femoral stem in total hip arthroplasty: gait analysis at increasing walking speeds and inclines

Variable

Incline

5%

SI

10%

SI

15%

SI

Groups

Limb

Weight-acceptance (BWN)

Short stem THR

Implanted

1.07 (0.97–1.07)

2.8

1.06 (0.96–1.12)

4.2

1.02 (0.94–1.22)†

4.1

Non-implanted

1.07 (0.97–1.07)

1.06 (0.95–1.12)

1.04 (0.95–1.18)

Long stem THR

Implanted

1.07 (1.02–1.29)

3.3

1.06 (0.96–1.27)

3.7

1.03 (0.95–1.19)†

4.0

Non-implanted

1.10 (0.98–1.29)

1.10 (0.98–1.26)

1.06 (0.92–1.22)

Control

Right

1.07 (0.95–1.23)

3.0

1.07 (1.00–1.21)

2.8

1.08 (0.99–1.40)

2.6

Left

1.07 (0.90–1.17)

1.07 (0.95–1.19)

1.08 (0.99–1.41)

Mid-stance (BWN)

Short stem THR

Implanted

0.81 (0.74–0.95)

3.5

0.80 (0.70–0.85)

3.0

0.80 (0.75–0.88)

4.2

Non-implanted

0.81 (0.78–0.93)

0.80 (0.70–0.85)

0.78 (0.72–0.86)

Long stem THR

Implanted

0.84 (0.72–0.91)

3.1

0.81 (0.69–0.92)

3.3

0.81 (0.71–0.91)

2.7

Non-implanted

0.84 (0.74–0.89)

0.80 (0.69–0.88)

0.81 (0.73–0.90)

Control

Right

0.83 (0.75–0.89)

3.1

0.80 (0.69–0.89)

3.3

0.75 (0.66–0.93)

4.3

Left

0.82 (0.74–0.91)

0.79 (0.66–0.87)

0.75 (0.60–0.95)

Push-off (BWN)

Short stem THR

Implanted

1.05 (0.99–1.09)

3.4

1.04 (0.97–1.14)

2.5

1.03 (0.94–1.16)

3.0

Non-implanted

1.05 (0.97–1.12)

1.04 (0.97–1.20)

1.03 (0.95–1.17)

Long stem THR

Implanted

1.06 (0.96–0.94)

3.0

1.07 (0.98–1.14)

2.7

1.03 (0.92–1.15)

4.7

Non-implanted

1.07 (0.94–0.94)

1.08 (0.96–1.20)

1.06 (0.96–1.17)

Control

Right

1.10 (0.90–1.13)

2.8

1.09 (1.01–1.25)

2.5

1.09 (0.90–1.24)

3.1

Left

1.11 (0.96–1.12)

1.10 (0.99–1.27)

1.10 (0.91–1.20)

Step length to height (N)

Short stem THR

Implanted

0.63 (0.55–0.72)

3.6

0.62 (0.55–0.71)

3.5

0.61 (0.53–0.69)

4.8

Non-implanted

0.63 (0.55–0.71)

0.63 (0.56–0.70)

0.62 (0.58–0.68)

Long stem THR

Implanted

0.62 (0.53–0.70)

2.6

0.63 (0.54–0.70)

4.8

0.62 (0.55–0.69)

3.5

Non-implanted

0.62 (0.54–.070)

0.61 (0.52–0.69)

0.61 (0.52–0.69)

Control

Right

0.64 (0.57–0.73)

3.2

0.64 (0.55–0.73)

2.9

0.63 (0.51–0.74)

3.6

Left

0.64 (0.51–0.73)

0.64 (0.54–0.73)

0.63 (0.57–0.74)

  1. Values are presented as means (range). SI signifies absolute symmetry index in percent %. BWN signifies body weight normalized force
  2. N signifies normalised to height as in step length. † Significant difference between patient groups versus controls (p < 0.05)
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