The Aberdeen Weight-Bearing Test (Knee)

a new objective test for anterior knee discomfort

David Robert Walker MacDonald (Corresponding Author), Haroon Rehman, Carol Ann Carnegie, Jordi Tomas-Hernandez, Alan John Johnstone

Research output: Contribution to journalArticle

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Abstract

Purpose
We present the Aberdeen Weight-Bearing Test (Knee), an objective test specific for anterior knee discomfort assessed via load bearing. We assess its validity by performing it on normal subjects with no knee symptoms and subjects who had undergone anterograde tibial nailing.

Methods
Two scales are placed parallel on the floor with the dials concealed from the subject. The subject then kneels with one knee on each scale. The weight through each knee is recorded at 0, 15, 30, 45, and 60 s. The proportion of total body weight on each leg at each timepoint is calculated, and a ratio calculated from the values. A value of 1 equates to equal weight on each leg. The test was performed on 53 normal subjects and 38 subjects who had undergone tibial nailing.

Results
In the normal group, no significant difference in mean ratio of weight distribution (left:right) was seen at any timepoint (mean ratio range = 0.98–0.99, p value range = 0.18–0.64). In the tibial nail group, a difference was observed in mean ratio of weight distribution (injured:uninjured) favouring the uninjured leg, reaching significance at 0, 15, 30, and 45 s (mean ratio range = 0.88–0.94, p value range = 0.01–0.02). At 60 s, the mean ratio was 0.93 (p = 0.09).

Conclusion
The Aberdeen Weight-Bearing Test (Knee) is an objective, easily reproducible, specific test for anterior knee discomfort. It produces different results in individuals who have undergone anterograde tibial nailing compared to individuals with no knee symptoms.
Original languageEnglish
JournalEuropean Journal of Trauma and Emergency Surgery
Early online date20 Jul 2018
DOIs
Publication statusE-pub ahead of print - 20 Jul 2018

Fingerprint

Weight-Bearing
Knee
Weights and Measures
Leg
Nails
Body Weight

Keywords

  • Outcome measure
  • Clinical assessment
  • Knee
  • Anterior knee pain
  • Tibial pain

Cite this

The Aberdeen Weight-Bearing Test (Knee) : a new objective test for anterior knee discomfort. / MacDonald, David Robert Walker (Corresponding Author); Rehman, Haroon; Carnegie, Carol Ann; Tomas-Hernandez, Jordi; Johnstone, Alan John.

In: European Journal of Trauma and Emergency Surgery, 20.07.2018.

Research output: Contribution to journalArticle

MacDonald, David Robert Walker ; Rehman, Haroon ; Carnegie, Carol Ann ; Tomas-Hernandez, Jordi ; Johnstone, Alan John. / The Aberdeen Weight-Bearing Test (Knee) : a new objective test for anterior knee discomfort. In: European Journal of Trauma and Emergency Surgery. 2018.
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abstract = "PurposeWe present the Aberdeen Weight-Bearing Test (Knee), an objective test specific for anterior knee discomfort assessed via load bearing. We assess its validity by performing it on normal subjects with no knee symptoms and subjects who had undergone anterograde tibial nailing.MethodsTwo scales are placed parallel on the floor with the dials concealed from the subject. The subject then kneels with one knee on each scale. The weight through each knee is recorded at 0, 15, 30, 45, and 60 s. The proportion of total body weight on each leg at each timepoint is calculated, and a ratio calculated from the values. A value of 1 equates to equal weight on each leg. The test was performed on 53 normal subjects and 38 subjects who had undergone tibial nailing.ResultsIn the normal group, no significant difference in mean ratio of weight distribution (left:right) was seen at any timepoint (mean ratio range = 0.98–0.99, p value range = 0.18–0.64). In the tibial nail group, a difference was observed in mean ratio of weight distribution (injured:uninjured) favouring the uninjured leg, reaching significance at 0, 15, 30, and 45 s (mean ratio range = 0.88–0.94, p value range = 0.01–0.02). At 60 s, the mean ratio was 0.93 (p = 0.09).ConclusionThe Aberdeen Weight-Bearing Test (Knee) is an objective, easily reproducible, specific test for anterior knee discomfort. It produces different results in individuals who have undergone anterograde tibial nailing compared to individuals with no knee symptoms.",
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N2 - PurposeWe present the Aberdeen Weight-Bearing Test (Knee), an objective test specific for anterior knee discomfort assessed via load bearing. We assess its validity by performing it on normal subjects with no knee symptoms and subjects who had undergone anterograde tibial nailing.MethodsTwo scales are placed parallel on the floor with the dials concealed from the subject. The subject then kneels with one knee on each scale. The weight through each knee is recorded at 0, 15, 30, 45, and 60 s. The proportion of total body weight on each leg at each timepoint is calculated, and a ratio calculated from the values. A value of 1 equates to equal weight on each leg. The test was performed on 53 normal subjects and 38 subjects who had undergone tibial nailing.ResultsIn the normal group, no significant difference in mean ratio of weight distribution (left:right) was seen at any timepoint (mean ratio range = 0.98–0.99, p value range = 0.18–0.64). In the tibial nail group, a difference was observed in mean ratio of weight distribution (injured:uninjured) favouring the uninjured leg, reaching significance at 0, 15, 30, and 45 s (mean ratio range = 0.88–0.94, p value range = 0.01–0.02). At 60 s, the mean ratio was 0.93 (p = 0.09).ConclusionThe Aberdeen Weight-Bearing Test (Knee) is an objective, easily reproducible, specific test for anterior knee discomfort. It produces different results in individuals who have undergone anterograde tibial nailing compared to individuals with no knee symptoms.

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