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Vol. 23. Issue 4.
Pages 329-336 (01 July 2019)
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Vol. 23. Issue 4.
Pages 329-336 (01 July 2019)
Original Research
DOI: 10.1016/j.bjpt.2018.09.009
Knee crepitus is not associated with the occurrence of total knee replacement in knee osteoarthritis – a longitudinal study with data from the Osteoarthritis Initiative
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Marcella Ferraz Pazzinattoa,b, Danilo de Oliveira Silvaa,b, Fábio Mícolis de Azevedoa,
Corresponding author
micolis@fct.unesp.br

Corresponding author at: Rua Roberto Simonsen, 305, CEP: 19060-900, Presidente Prudente, SP, Brazil.
, Evangelos Pappasc
a Physical Therapy Department, School of Science and Technology, Universidade Estadual Paulista (UNESP), Presidente Prudente, SP, Brazil
b La Trobe Sports and Exercise Medicine Research Centre (LASEM), School of Allied Health, La Trobe University, Bundoora, Australia
c Discipline of Physiotherapy, Faculty of Health Sciences, University of Sydney, Sydney, Australia
Highlights

  • Crepitus is not associated with higher odds of having total knee replacement.

  • Crepitus is associated with decreased quadriceps strength in patients with KOA.

  • Crepitus does not affect physical function and quality of life of patients with KOA.

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Tables (3)
Table 1. Anthropometric characteristics of the participants at baseline.
Table 2. Amount of participants undergone TKR presented by presence of knee crepitus and KL grade at baseline.
Table 3. Interactions and mean (standard deviation) values of the variables with significant interaction.
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Abstract
Objective(s)

To investigate whether the presence of knee crepitus is associated with the occurrence of total knee replacement (TKR), quality of life and deficits in physical function at long-term.

Methods

Setting – This observational study uses longitudinal data (up to 4-year follow-up) from the Osteoarthritis Initiative (OAI). Participants – 4566 participants. Main Outcome Measure(s) – Logistic regression models were used to test if baseline knee crepitus is associated with the occurrence of TKR. Linear mixed models with adjustment for confounding variables (age, gender, BMI and Kellgren–Lawrence grade) were used to test the association between baseline knee crepitus and longitudinal changes in the pain, self-reported physical function, quality of life and performance-based function.

Results

The presence of knee crepitus at baseline does not predict the occurrence of TKR at 36 months (p=0.58 and 0.67 for right and left knees, respectively). The crepitus group presented a slightly knee extension strength decline from baseline to 48 months (p=0.03 for the right and 0.01 for the left knee; between group difference=2% for both right [95%CI=−0.12; −0.01] and left knees [95%CI=−0.13; −0.02]).

Conclusion

The presence of knee crepitus is not associated with the occurrence of TKR in the following three years. Knee crepitus is associated with slightly declines in knee extension strength, but this does not seem to affect physical function and quality of life at long-term.

Keywords:
Knee osteoarthritis
Quality of life
Recovery of function
Knee

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