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Relationships between fatty infiltration in the thigh and calf in women with knee osteoarthritis.
- Source :
-
Aging clinical and experimental research [Aging Clin Exp Res] 2017 Apr; Vol. 29 (2), pp. 291-299. Date of Electronic Publication: 2016 Mar 10. - Publication Year :
- 2017
-
Abstract
- Background: In individuals with knee osteoarthritis (OA), fatty infiltration into thigh muscle is associated with poor physical performance and strength. However, it is not known whether this also occurs in the calf and if this impacts physical function.<br />Aims: We investigated the relationships between volumes of intramuscular fat (intraMF), intermuscular fat (IMF), subcutaneous fat (SCF), lean muscle and muscle adiposity, in the thighs compared to the calves of women with knee OA.<br />Methods: MRI scans of the thigh and calf were acquired from 20 women over 55 years with knee OA (3.0T Discovery MR750, GE Healthcare). Axial IDEAL (iterative decomposition of water and fat with echo asymmetry and least-squares estimation) fat-separated images were segmented to quantify intraMF, IMF, SCF and lean muscle volumes (SliceOmatic 5.0, Tomovision). Correlation and linear regression analyses were run.<br />Results: We found a positive relationship between thigh and calf intraMF (R <superscript>2</superscript>  = 0.592; B = 5.49; p = 0.001), muscle adiposity (R <superscript>2</superscript>  = 0.539; B = 0.567; p = 0.001), and SCF volume (R <superscript>2</superscript>  = 0.699; B = 12.847; p = 0.001), controlling for waist-to-hip ratio. Relationships between thigh and calf IMF (R <superscript>2</superscript>  = 0.239; B = 7.743; p = 0.061), lean muscle (R <superscript>2</superscript>  = 0.245; B = 4.149; p = 0.047) and combined intraMF and IMF volume (R <superscript>2</superscript>  = 0.242; B = 6.162; p = 0.044) were not significant.<br />Discussion: Although a correlation exists between thigh and calf muscle adiposity, intraMF and SCF, this does not hold true for IMF or lean muscle. A greater amount of intraMF infiltration occurs in the thigh compared to the calf of women with knee OA.<br />Conclusion: The calf and thigh may both be involved in pathologic changes in muscle composition in knee OA.
- Subjects :
- Aged
Body Composition
Female
Humans
Magnetic Resonance Imaging methods
Middle Aged
Obesity physiopathology
Statistics as Topic
Adipose Tissue pathology
Leg diagnostic imaging
Leg pathology
Osteoarthritis, Knee pathology
Osteoarthritis, Knee physiopathology
Quadriceps Muscle diagnostic imaging
Quadriceps Muscle pathology
Thigh diagnostic imaging
Thigh pathology
Subjects
Details
- Language :
- English
- ISSN :
- 1720-8319
- Volume :
- 29
- Issue :
- 2
- Database :
- MEDLINE
- Journal :
- Aging clinical and experimental research
- Publication Type :
- Academic Journal
- Accession number :
- 26964549
- Full Text :
- https://doi.org/10.1007/s40520-016-0556-z